Abstract
Specialised vocabulary development in English for Specific Purposes (ESP) remains a central challenge in preparing learners for professional communication in terminologically dense disciplines. This study examines how the systematic integration of professional texts, genre-based pedagogy, and targeted digital support facilitates lexical depth and transfer within professional discourse, addressing the limited empirical evidence on how these dimensions interact in classroom practice. Drawing on a classroom-based mixed-methods design conducted across three higher education institutions (N = 84 undergraduate students; N = 10 ESP instructors) within medicine-, pharmacy-, engineering- and IT-oriented ESP programmes, the study combines structured classroom observations (24 lessons over eight weeks), instructor questionnaires and semi-structured interviews, student focus-group discussions, and a comparative content analysis of five widely used ESP textbooks. The analysis foregrounds discourse-relevant indicators of specialised lexical competence, including collocational control, register sensitivity, contextual appropriateness, and transfer from text-based input to written and spoken output. Results indicate that sustained engagement with authentic professional genres—such as research abstracts, clinical documentation, pharmaceutical texts, technical manuals, laboratory protocols, and engineering reports—supported by explicit genre scaffolding and digitally mediated noticing activities (e.g., corpus-based exploration and spaced repetition), appears to facilitate deeper lexical internalisation and supports more accurate professional language use. On this basis, an empirically grounded input–processing–output model is proposed, in which professional texts provide genre-mediated input, guided processing supports noticing and consolidation, and output tasks operationalise lexical transfer. The model offers empirically grounded design principles for ESP curricula and teacher development in terminologically dense disciplines.
1 Introduction
In the field of English for Specific Purposes (ESP), the acquisition of specialised vocabulary is not merely an ancillary objective but a central pillar of professional language competence. Unlike general English instruction, which prioritizes everyday communication and broad linguistic fluency, ESP instruction targets the mastery of terminology and discourse practices unique to specific domains such as medicine, law, engineering, and the natural sciences. These domains are characterized by high lexical specificity, functional precision, and often, complex syntactic structures that serve both referential and disciplinary functions. As such, the teaching of ESP vocabulary requires a distinctly different pedagogical framework—one that reflects the realities of professional communication and prepares learners for the linguistic demands of their future academic and workplace environments.
Furthermore, the rise of digital pedagogy has opened new avenues for supporting specialised vocabulary learning. Technologies such as corpus analysis tools, terminology databases, spaced repetition platforms, and AI-assisted annotation systems have enabled educators to deliver more interactive, adaptive, and data-driven vocabulary instruction. These tools not only facilitate access to authentic linguistic input but also allow learners to analyze lexical patterns, track their own progress, and engage in self-directed learning. When combined with genre-based and task-based instructional approaches, technology-enhanced learning environments offer the potential for more robust, personalised, and context-sensitive acquisition of professional vocabulary.
Against this background, the present study addresses these gaps by moving beyond descriptive accounts of professional texts and digital tools toward an integrated, process-oriented examination of specialised vocabulary development in ESP.
Specifically, by empirically tracing how learners engage with specialised vocabulary across instructional stages—from exposure to professional genres, through guided processing, to productive use in writing and speaking—the study provides a detailed account of how lexical depth and contextual appropriateness are developed in classroom practice.
Accordingly, the study is guided by the following research questions:
What classroom techniques are used to teach specialised vocabulary through professional texts in the participating ESP programmes?
How are digital tools integrated to support lexical processing, retention, and transfer?
What patterns of learner response and perceived learning outcomes emerge when instruction is organised around an input–processing–output cycle?
The study contributes to ESP vocabulary research by operationalising lexical transfer as observable movement from text-based input to genre-appropriate spoken and written output, using classroom-derived indicators (collocational control, register-sensitive choices, and stance marking). In addition, it conceptualises digital tools not as add-on resources but as mediating supports embedded within the input–processing–output cycle, showing how technology can facilitate noticing, consolidation, and verification of specialised lexis within professional genres.
2 Literature review
Research in English for Specific Purposes (ESP) has consistently demonstrated that the acquisition of specialised vocabulary is inseparable from learners’ engagement with disciplinary discourse (; ). Early ESP frameworks emphasised that professional language competence is shaped by communicative needs, disciplinary conventions, and the genres through which knowledge is constructed and transmitted (; ). From this perspective, vocabulary learning extends beyond the memorisation of technical terms and involves understanding how lexical items function within conventionalised professional texts. While these early ESP frameworks established the importance of disciplinary discourse, they offered limited guidance on how specialised vocabulary develops as a progressive competence across instructional stages. Vocabulary was typically treated as a component of needs analysis or text selection, rather than as a developmental construct shaped through repeated engagement with professional genres ().
Subsequent research has reinforced the role of genre-based pedagogy in specialised vocabulary development. Genre-oriented approaches argue that terminology is embedded within recurrent rhetorical structures, discourse moves, and epistemic practices characteristic of professional communities. From this perspective, specialised vocabulary is not acquired in isolation but through engagement with professional texts, where linguistic features are shaped by communicative purposes and disciplinary conventions. This view aligns with research highlighting the importance of genre awareness and explicit attention to language in developing L2 writing proficiency ().
However, despite establishing the contextualised nature of specialised vocabulary, genre-based research has largely prioritised rhetorical structure and communicative purpose, while offering limited insight into the systematic organisation of lexical patterning in authentic texts. Early corpus-based studies attempted to address this limitation by analysing specialised language within genre-specific corpora, demonstrating that vocabulary is realised through recurrent collocational and phraseological patterns shaped by disciplinary conventions (). While genres clearly shape phraseological patterns and terminological choices, recent pedagogical research has extended this perspective by examining genre-based instruction in relation to writing development, learner engagement, and disciplinary literacy development rather than the internalisation of specialised vocabulary itself. For example, process-genre research has focused on engagement and writing outcomes, digital genre studies have explored learners’ movement across online and specialised genres, and task-based interventions in scientific writing have reported gains in genre performance and perceived vocabulary growth (; ; ). Within this line of research, the ways in which learners process specialised vocabulary through genre engagement and subsequently transfer it to their own spoken and written production remain comparatively underexplored.
Empirical studies in ESP further indicate that authentic professional texts enhance terminological accuracy and contextualised language use, particularly in medical and scientific domains (; ). These studies predominantly evaluate learning outcomes in terms of improved performance, with comparatively less focus on the processes through which specialised vocabulary is internalised and integrated into learners’ active language use. As a result, while the role of professional texts in supporting vocabulary development is well established, the mechanisms underlying learners’ engagement with such input and the subsequent transformation of vocabulary knowledge into productive use remain insufficiently explored. Classroom-based research in medical ESP contexts has shown that systematic integration of professional texts contributes to improved lexical precision, increased awareness of disciplinary phraseology, and greater confidence in professional communication (). These findings suggest that vocabulary instruction grounded in authentic discourse can bridge the gap between classroom learning and real-world professional language use. At the same time, further research is needed to explore how specialised vocabulary is processed, retained, and transferred into learners’ active language use across different communicative contexts.
Despite these advances, several challenges remain unresolved in ESP vocabulary pedagogy. One persistent issue concerns the balance between authenticity and accessibility. While authentic texts reflect real professional communication, their lexical density and conceptual complexity may pose difficulties for learners unless authenticity is pedagogically scaffolded through pre-task support, guided noticing, and staged progression from semi-authentic to fully authentic genres.
Recent methodological developments have highlighted the potential of technology-enhanced instruction to address these challenges. Corpus-based tools, digital glossaries, and data-driven learning environments enable learners to explore lexical patterns, collocations, and frequency distributions in authentic texts (). Moreover, other research also indicates that the pedagogical effectiveness of such tools depends on their integration into coherent instructional designs rather than their standalone use (). Nevertheless, technology-mediated vocabulary instruction in ESP remains conceptually fragmented. Digital tools are frequently introduced as independent enhancements rather than as components of a coherent instructional sequence that links input, cognitive processing, and output. As a result, their potential to support lexical depth and transfer within professional genres is not always fully realised.
A complementary theoretical line is data-driven learning, where learners inductively notice lexical and phraseological patterns through guided work with corpora and concordances. In ESP, corpus-informed pedagogy has been shown to support collocational control and register sensitivity, particularly when corpus work is integrated into genre-focused tasks rather than treated as an isolated activity (). This perspective is directly relevant to technology-supported vocabulary learning because it frames digital tools as resources for noticing and verification within authentic professional discourse.
Building on these converging theoretical strands, the present study conceptualises specialised vocabulary learning as a genre-mediated developmental process supported by a structured instructional cycle of input, processing, and output. Within this framework, professional texts serve as both linguistic input and cognitive scaffolds, while digital tools function as mediating resources that facilitate noticing, consolidation, and transfer. This perspective positions vocabulary instruction at the intersection of discourse theory, lexical development, and pedagogical design in ESP.
3 Methodology
3.1 Participants and context
The study employed a classroom-based mixed-methods design () in order to capture both the instructional processes involved in specialised vocabulary teaching and the ways these processes are perceived and enacted by participants in ESP contexts. This design is particularly appropriate for research on vocabulary development in professional discourse, where learning outcomes are not limited to measurable gains in vocabulary size but involve qualitative changes in lexical depth (), contextual appropriateness, and genre-sensitive use (). This study was conducted across three higher education institutions: two medical universities and one technical university, all of which offer English for Specific Purposes (ESP) programmes integrated into their core curricula (). A total of 84 undergraduate students participated in the research, with approximately equal representation from each institution. All students were in their second or third year of study and had already completed general English language modules prior to enrollment in ESP courses. Their academic specializations included medicine, pharmacology, biomedical engineering, and information technology—disciplines with a high demand for precise and field-specific English proficiency.
In addition to the student cohort, ten ESP instructors were involved in the study. These instructors had varying levels of teaching experience, ranging from three to fifteen years, and were responsible for the design and delivery of ESP modules within their respective institutions. The instructors represented a diverse methodological background, including traditional vocabulary teaching approaches, task-based learning, and technology-enhanced instruction. Their insights were essential in triangulating the classroom data with pedagogical perspectives.
3.2 Data collection
Data were collected through a combination of textbook analysis, classroom observation, instructor questionnaires and interviews, and student focus-group discussions. This multi-source design was intended to capture both instructional practices and participants’ perceptions of specialised vocabulary learning within ESP contexts.
The textbook analysis focused on five widely used ESP textbooks: three designed for medical English and two for engineering and applied sciences. Each textbook was evaluated using a standardised analytic rubric that examined the level of text authenticity (authentic, semi-authentic, or adapted), the degree of contextualisation of specialised vocabulary, alignment between tasks and professional genres, opportunities for productive lexical transfer, and the presence of integrated digital support materials. The analysis aimed to identify how professional texts and terminology were operationalised in published materials and to benchmark classroom practices against existing instructional resources.
Classroom observations were conducted over an eight-week period across the three participating institutions. A total of twenty-four lessons were observed, with eight lessons per institution. Observations followed a structured protocol focusing on instructional sequencing, types of professional texts used, methods of vocabulary introduction and reinforcement, learner engagement, and opportunities for productive use of specialised terminology. Particular attention was paid to how vocabulary learning progressed from initial exposure to processing and output within genre-based tasks. Observation notes were recorded in analytic field-note format immediately following each session.
Instructor perspectives were collected through questionnaires and semi-structured interviews. Ten ESP instructors completed the questionnaire, which included Likert-scale items addressing the frequency and perceived effectiveness of professional text use, vocabulary teaching strategies, and digital tool integration, as well as open-ended questions exploring pedagogical challenges and institutional conditions. Follow-up interviews were conducted with all participating instructors to elaborate on questionnaire responses and to gain deeper insight into instructional decision-making and methodological rationale.
Student perspectives were gathered through six focus-group discussions, with two focus groups conducted at each institution. Each group consisted of six to eight undergraduate students and lasted between thirty-five and fifty minutes. Discussions followed a semi-structured guide addressing learners’ experiences with professional texts, perceived usefulness of specific vocabulary-related tasks, the role of digital tools in retention and transfer, and challenges associated with terminologically dense genres. Focus groups were conducted primarily in English, with brief use of the participants’ first language where necessary to ensure accuracy of meaning. All sessions were audio-recorded with informed consent and summarised through analytic memos for subsequent thematic analysis.
Together, these data sources provided a comprehensive account of how specialised vocabulary instruction through professional texts is designed, implemented, and perceived in ESP classrooms, allowing for triangulation across materials, instructional practices, and learner experience.
3.3 Analytical approach
Quantitative data from teacher questionnaires were analysed using descriptive statistics to identify prevailing trends in methodology, tool adoption, and vocabulary focus areas. Cross-institutional comparisons were made to assess consistency and variation in practices.
While the quantitative data from teacher questionnaires were analyzed through descriptive statistics to establish general trends, the primary focus of the study remained on the qualitative depth of instructional processes. This approach prioritized the understanding of ‘how’ and ‘why’ specific techniques functioned within the classroom over broad statistical generalization.
Qualitative data from classroom observations and interviews were analysed thematically. The qualitative analysis proceeded in two stages. First, open coding was used to label recurring instructional events and learner responses (e.g., term extraction from text, genre-feature highlighting, collocation noticing, scaffolded pre-reading, output-oriented rewriting, corpus-based verification). Second, codes were grouped into higher-order categories aligned with the study focus: (a) genre-mediated scaffolding, (b) cognitive processing and noticing practices, (c) output/transfer tasks, and (d) technology as mediating support. Coding was conducted across observation notes, interview transcripts, focus-group summaries, and textbook-task descriptions, allowing cross-source comparison and identification of convergent patterns.
Additionally, the textbook content analysis yielded comparative data on how professional texts are integrated into published ESP materials. These findings helped to benchmark classroom practices against available instructional resources and provided insight into potential gaps between curriculum content and real-world communicative needs. To operationalise lexical development within a classroom-based mixed-methods design, the analysis traced observable indicators of specialised vocabulary competence across tasks and data sources. These included (a) accuracy and consistency of term use in student output, (b) emergence of discipline-specific collocations and phraseological patterns, (c) register-appropriate lexical choices and stance markers (including hedging where relevant), and (d) evidence of transfer from text-based input to productive tasks such as summaries, short reports, and oral explanations. These indicators were identified in observation notes and student artefacts where available, and were triangulated with instructor evaluations and student focus-group reflections.
The methodological choices were guided by the study's research questions. Classroom observations and textbook analysis were used to address Research Question 1 by identifying instructional techniques and text-based practices. Instructor questionnaires and interviews informed Research Question 2 by documenting the integration of digital tools and pedagogical rationales. Student focus-group data and observational evidence were analysed in relation to Research Question 3 to explore patterns of learner response and perceived learning outcomes within the input–processing–output cycle. The primary units of analysis included instructional tasks, classroom interaction episodes involving specialised vocabulary, and instances of learner output in spoken and written activities. These units enabled systematic comparison across instructional contexts and facilitated identification of recurring pedagogical patterns.
To enhance the trustworthiness of the findings, methodological triangulation was employed through the combination of observations, interviews, questionnaires, and textbook analysis. Data sources were cross-checked to identify converging patterns, and preliminary interpretations were reviewed and refined through iterative analytic reflection to reduce individual bias. While the study does not aim for statistical generalisation, its analytical depth supports theoretical and pedagogical transferability within comparable ESP contexts.
To increase analytic reliability, a subset of the data (approximately one-third of observation records and focus-group summaries) was re-coded after a two-week interval, and category definitions were refined where inconsistencies emerged. Disagreements were resolved through discussion focused on aligning codes with observable classroom evidence rather than interpretive assumptions.
To ensure the reliability of the qualitative analysis, the coding process followed a constant comparative method, where new data were continuously checked against established codes. Any ambiguities in category definitions were resolved through iterative refinement, and the use of multiple data sources (triangulation) served to cross-verify the emergent patterns, reducing potential researcher bias.
In the final stage of the analytical process, a cross-case synthesis was conducted to integrate findings from all data sources (observations, interviews, and textbook analysis). To provide a systematic overview of the instructional mechanism, the identified pedagogical patterns were mapped onto a conceptual framework consisting of four interconnected stages: input exposure, cognitive processing, productive output, and teacher/digital mediation. This synthesis aimed to illustrate the functional relationships between specific classroom practices and their corresponding learning outcomes, forming the basis for the integrated ESP vocabulary instruction model presented in the Results section.
4 Results
This section reports the empirical findings of the study, organised around the research questions and interpreted in relation to the instructional cycle of input, processing, and output.
4.1 Text-mediated vocabulary teaching techniques
To address Research Question 1, classroom observations identified a set of recurrent instructional techniques used to teach specialised vocabulary through professional texts. Classroom observations revealed a consistent instructional logic underlying specialised vocabulary teaching across the participating ESP programmes, despite variation in institutional context and instructor experience. Across the observed lessons, vocabulary instruction was most frequently organised around professional texts that functioned as both linguistic input and discourse models.
Text-based vocabulary extraction was observed in twenty-one of the twenty-four lessons. In these sessions, students identified key disciplinary terms directly from professional texts and were guided to analyse their meanings in context rather than relying solely on dictionary definitions. Instructors frequently prompted learners to compare terminological usage across sentences or sections of the same text, fostering sensitivity to collocational patterns and register-specific constraints.
Genre-oriented reading tasks were observed in seventeen lessons, particularly in medical ESP classes. Students worked with clinical case reports, research abstracts, and patient information leaflets, with instructors explicitly highlighting genre-specific discourse moves and their associated lexical patterns. For example, during abstract analysis tasks, attention was consistently drawn to hedging devices and reporting verbs, while case-report tasks foregrounded diagnostic terminology and evaluative stance.
Text-based pre-reading scaffolding was employed in approximately two-thirds of the observed lessons. These activities included semantic mapping, guided prediction tasks, and selective pre-teaching of high-load terminology. Such scaffolding appeared to reduce cognitive overload and enabled more sustained engagement with complex professional texts during subsequent stages of instruction.
Text-driven output activities were a critical site of lexical consolidation. In eighteen lessons, students were required to produce short written outputs—such as case summaries, abstract paraphrases, or problem–solution descriptions—using terminology encountered in the source texts. These tasks consistently prompted more accurate and context-sensitive lexical use than activities limited to recognition or definition.
Collaborative vocabulary practices were observed in fourteen lessons, often supported by digital platforms such as shared documents or online boards. Students collectively curated discipline-specific glossaries, frequently supplementing definitions with example sentences extracted from professional texts. Instructors reported that these collaborative artefacts were reused across lessons, contributing to cumulative lexical development.
These findings indicate that specialised vocabulary instruction in ESP programmes is primarily realised through a combination of text-based extraction, genre-oriented reading, scaffolded pre-reading support, output-oriented consolidation tasks, and collaborative vocabulary practices. At the same time, the effectiveness of these techniques appears to depend not only on classroom implementation but also on the extent to which instructional materials support the integration of professional texts and genre-based tasks.
4.1.1 Textbook support
This analysis provides additional context for Research Question 1 by examining how instructional materials support or constrain the implementation of classroom techniques identified in the observed ESP programmes. The textbook analysis examined five ESP textbooks currently used across participating institutions. All textbooks contained domain-specific vocabulary relevant to their target disciplines; however, the extent to which professional texts were integrated varied considerably.
Three of the textbooks incorporated authentic or semi-authentic materials within thematic units, including excerpts from journal articles, medical charts, and professional reports. In many cases, however, these texts were simplified or abridged, limiting students’ exposure to authentic discourse complexity. Only two textbooks offered activities explicitly aligned with genre-based instruction, such as tasks focusing on the structure of research reports or the communicative function of hedging in professional contexts.
Glossaries were present in all textbooks, yet their pedagogical integration differed. In several instances, glossaries were presented as isolated word lists without reference to contextual usage, which reduced their instructional value. Digital supplements, including QR-linked videos, online term banks, and interactive exercises, appeared in only two of the textbooks and were not consistently integrated into lesson design.
The textbook analysis therefore revealed a noticeable gap between the theoretical emphasis on authentic professional texts in ESP research and their practical implementation in commercially available teaching materials.
4.2 Digital tools in ESP vocabulary instruction: patterns of integration
To address Research Question 2, the analysis focused on how digital tools are integrated across different stages of lexical development, including processing, retention, and transfer, within text-based ESP instruction. Survey data collected from instructors indicated a growing but uneven adoption of digital tools for specialised vocabulary instruction. The most frequently reported technologies included flashcard applications such as Quizlet and Anki, which were used primarily for repetition and spaced learning of terminology. Teachers noted that these tools were particularly effective for self-directed practice outside the classroom. These tools primarily supported retention through repeated exposure to specialised vocabulary. Notably, instructors reported that spaced-repetition tools were most effective when the item set was built from the week's professional texts and when learners were required to apply the same terms in a follow-up output task; when flashcards were used as standalone memorisation, teachers perceived limited transfer to writing and speaking performance.
Corpus analysis software, including AntConc, was employed mainly by instructors with linguistics or ESP-specific training. These tools enabled students to observe patterns of word frequency, collocation, and concordance within authentic corpora, supporting data-driven exploration of specialised vocabulary. In these contexts, digital tools supported lexical processing by enabling learners to notice, compare, and analyse vocabulary patterns within authentic texts. Learning Management Systems were also used to deliver reading materials and vocabulary quizzes incorporating professional texts in digital format.
In some contexts, speech recognition tools and AI-assisted writing applications were introduced for pronunciation practice and lexical correction. While these tools offered immediate feedback, instructors expressed concern about potential overreliance and uneven student engagement.
Despite the availability of digital resources, instructors identified several barriers to effective integration. These included limited institutional infrastructure, insufficient training in digital pedagogy, and variability in students’ digital literacy. Nevertheless, instructors who successfully combined professional texts with interactive technologies reported higher levels of learner autonomy, motivation, and lexical awareness.
A critical pattern emerging from the data was that digital tools were most effective when they were integrated into a structured instructional sequence linking processing, retention, and transfer. In classrooms where technology functioned as an isolated add-on, its impact on contextualised vocabulary use remained limited. By contrast, when digital tools supported noticing, consolidation, and application within professional texts, more consistent evidence of lexical uptake and transfer was observed.
4.3 Patterns of learner response and outcomes in the instructional cycle
To address Research Question 3, the analysis examined patterns of learner response and perceived learning outcomes emerging across instructional practices. The findings suggest that these patterns can be meaningfully interpreted in relation to the instructional cycle, linking exposure to professional texts, engagement with vocabulary, and the development of productive lexical use.
Student responses indicated a clear preference for vocabulary instruction anchored in authentic professional texts and meaningful communicative tasks. Across focus-group discussions, learners consistently described professional texts as more motivating and relevant than simplified instructional materials, particularly when tasks mirrored anticipated professional activities. These responses highlight the role of authentic input in sustaining engagement and supporting initial lexical uptake.
At the level of lexical processing, students reported increased confidence in interpreting disciplinary texts, particularly in relation to terminology density and phraseological patterning. In medical ESP groups, repeated exposure to authentic case reports and abstracts appeared to support learners’ ability to anticipate lexical choices associated with specific discourse functions, such as diagnosis, evaluation, and reporting uncertainty. These observations suggest that structured interaction with professional texts facilitates deeper lexical processing through pattern recognition, collocational awareness, and sensitivity to discourse-specific usage constraints. Importantly, these stages did not function independently; rather, learner engagement with input was observed to correlate with the depth of lexical processing, which subsequently informed the quality of productive use.
In terms of productive use, instructor observations and learner feedback indicated qualitative improvements in students’ ability to use specialised vocabulary. Over the eight-week observation period, learners demonstrated increased use of discipline-specific collocations and greater control over register-appropriate terminology in both written and oral tasks. In medical groups, students increasingly employed hedging expressions and reporting structures characteristic of clinical discourse when summarising cases or presenting findings. This transfer was particularly evident in learners’ ability to use collocations and register-appropriate expressions rather than isolated lexical items, suggesting a shift from surface-level recognition to context-sensitive lexical control.
Across these dimensions, a recurring pattern was that vocabulary learning was more effective when learners engaged repeatedly with professional texts and were required to use terminology in context. However, this effect was contingent on the integration of input and output tasks; when exposure to professional texts was not followed by opportunities for contextualised use, evidence of transfer was less consistent. Observational evidence and instructor evaluations further indicated that vocabulary introduced through decontextualised exercises was less reliably retained or transferred compared to vocabulary embedded in authentic discourse.
Students also highlighted the value of digital tools in supporting vocabulary retention, particularly when such tools reinforced terminology encountered in classroom texts rather than introducing isolated word lists. In these cases, digital tools appeared to function as mediating resources that supported consolidation and retrieval within a broader instructional sequence.
Taken together, these findings indicate that specialised vocabulary development in ESP can be understood as a staged and interdependent process, in which engagement with authentic texts, lexical processing, and productive use are closely interconnected. The effectiveness of each stage appears to depend on its integration with the others, supporting the view that lexical development is most robust when instructional design systematically links input, processing, and output.
4.4 Summary of empirical findings
The results indicate consistent patterns across instructional practices, materials, and learner responses. Notably, the analysis revealed a discrepancy between the requirements of authentic professional discourse and the simplified content of commercial ESP textbooks. However, the findings suggest that effective instructional techniques and teacher mediation can successfully bridge this gap by re-contextualizing vocabulary within genre-specific tasks. The integration of professional texts into ESP instruction was associated with higher learner engagement, improved contextualised use of specialised vocabulary, and increased awareness of disciplinary discourse conventions. To synthesise these findings across data sources, recurrent instructional patterns were mapped against observed cognitive processes and learning outcomes. Table 1 presents this cross-case synthesis, illustrating how stages of the instructional cycle corresponded with specific forms of lexical engagement and development.
Table 1
| Instructional stage | Observed classroom practice | Cognitive process | Learning outcome | Evidence source |
|---|---|---|---|---|
| Input (Exposure) | Reading authentic professional texts; identifying terminology in context | Semantic activation; contextual inference | Improved recognition of discipline-specific terms | Classroom observations (24 lessons); student focus groups |
| Processing (Internalisation) | Semantic mapping; guided genre analysis; collaborative glossaries | Deep lexical encoding; pattern noticing | Increased retention and collocational awareness | Observation notes; instructor interviews |
| Output (Application) | Writing abstracts, case summaries, short reports | Productive retrieval; discourse structuring | Enhanced collocational control and register-appropriate lexical use (e.g., hedging expressions and reporting verbs) | Student artefacts; instructor evaluations |
| Teacher Mediation | Guided questioning; corrective feedback; modelling | Metacognitive awareness; self-monitoring | Improved learner self-regulation | Observations; teacher questionnaires |
| Digital Support | Corpus tools; flashcards; online glossaries | Spaced retrieval; pattern noticing via concordance; multimodal reinforcement | Enhanced lexical recall and transfer | Instructor reports; student feedback |
Empirically observed relationships between instructional stages, classroom practices, and vocabulary learning outcomes.
While the effectiveness of the instructional stages is largely contingent upon the quality of input materials, the observed gap in textbook support necessitates targeted teacher-led scaffolding to maintain professional authenticity.
Table 1 summarises the cross-source pattern observed across the three institutions: the clearest evidence of lexical uptake and transfer was observed when each stage of the cycle was explicitly linked to a subsequent output task, and when digital tools were used for verification and spaced consolidation rather than isolated memorisation. In classroom data, the strongest evidence of development concerned collocational control and register sensitivity, especially in tasks requiring students to recontextualise terminology from professional texts into abstracts, case summaries, and short reports. The synthesis confirms that digital tools reach their maximum pedagogical potential only when they are functionally integrated into the instructional sequence; for instance, when flashcard item sets are derived directly from previously analyzed professional texts rather than used as decontextualized word lists. This synthesis provides the basis for interpreting the instructional mechanism of the model in relation to ESP theory in the Discussion section.
5 Discussion
The findings of this study extend existing ESP research by demonstrating not only that specialised vocabulary acquisition benefits from authentic professional discourse, but also how such discourse mediates cognitive and discursive development across instructional stages. While previous studies have established the value of authenticity and genre awareness in ESP contexts, the present findings highlight the dynamic interaction between input, processing, and output as a mechanism for lexical internalisation within professional genres. The consistent use of professional texts—such as scientific articles, patient records, and technical manuals—provided learners with exposure not only to domain-specific terminology but also to the collocational, syntactic, and pragmatic features that characterize expert communication in their respective fields. Through this integration, vocabulary instruction functions as an entry point into disciplinary thinking, enabling learners to observe how professionals reason, report, and argue within the linguistic conventions of their domain.
From a theoretical perspective, the findings of this study can be interpreted through three complementary strands of ESP research: (a) lexical depth and vocabulary development, (b) genre-based discourse theory, and (c) data-driven and technology-mediated learning. While each of these perspectives has been extensively discussed in ESP literature, they are rarely operationalised together in classroom-based research on specialised vocabulary.
First, the observed patterns align with Nation's distinction between vocabulary size and vocabulary depth, particularly the emphasis on collocational control, register sensitivity, and context-dependent use of specialised terms. The findings suggest that exposure alone is insufficient to develop lexical depth; rather, depth emerges when learners repeatedly process and enact vocabulary within genre-specific tasks.
Second, the results extend genre-based ESP theory (Hyland, Johns) by demonstrating that genre awareness becomes pedagogically effective only when it is linked to productive lexical use. Genre knowledge without opportunities for enactment remains largely receptive, whereas tasks requiring learners to reproduce disciplinary genres activate deeper lexical processing and facilitate transfer from input to output.
Finally, the role of digital tools in this study supports a mediated view of vocabulary learning. Rather than functioning as independent instructional solutions, corpus tools, digital glossaries, and spaced-repetition systems acted as cognitive mediators that enhanced noticing, verification, and consolidation of specialised vocabulary within professional texts. This interactional role of technology has been under-theorised in ESP vocabulary research and is made visible through the instructional cycle identified in the present study.
5.1 The value of genre-based instruction
One of the most salient insights emerging from classroom observations and instructor feedback concerns the pedagogical effectiveness of genre-based instruction. This approach enables students to understand not only what vocabulary is used but why, how, and where it is used within a specific communicative act. In professional contexts, linguistic form is never arbitrary—it serves clear epistemic and rhetorical functions. For example, the frequent use of passive constructions and nominalisation in medical research articles reflects conventions of objectivity and methodological precision, while hedging expressions such as may suggest or possibly associated with illustrate the caution and interpretive nuance inherent to scientific reasoning.
By explicitly drawing learners’ attention to these conventions, instructors transform vocabulary from a static collection of terms into a dynamic system of meaning-making resources. Students begin to perceive words as functional instruments that construct disciplinary arguments, express evidence-based reasoning, and mark social alignment within their professional community. Reconstructive tasks—such as rewriting sections of published reports, paraphrasing diagnostic findings, or composing abstracts modeled on authentic examples— were perceived by instructors as effective, appearing to encourage learners to reproduce professional discourse patterns while maintaining lexical accuracy and stylistic appropriateness. This fusion of imitation and creativity supported deeper cognitive processing, resulting in longer-term lexical retention and a more authentic professional voice.
From a theoretical perspective, these findings resonate with genre-based views of ESP that conceptualise vocabulary as a functional component of disciplinary meaning-making rather than as an autonomous linguistic unit. However, the present study adds to this perspective by showing that genre awareness alone is insufficient unless learners are systematically guided to reproduce genre-specific lexical patterns through productive tasks. This suggests a shift from genre exposure toward genre enactment as a critical condition for specialised vocabulary development.
5.2 Integration of technology: opportunities and challenges
The integration of digital tools emerged as both an enabling factor and a challenge in specialised vocabulary instruction. Applications such as Quizlet and Anki enhanced memorization through spaced repetition and gamified review, particularly for lower-frequency medical or technical terms. Corpus analysis software allowed students to observe genuine language use, discover collocations, and identify lexical patterns characteristic of professional registers. When combined with multimedia glossaries and AI-based feedback tools, technology expanded the boundaries of the classroom, transforming vocabulary learning into an adaptive, data-driven process.
However, this potential was limited by several structural and pedagogical barriers. The study revealed significant disparities in teachers’ digital literacy, institutional infrastructure, and students’ access to technological resources. In some universities, learning platforms and digital repositories were effectively integrated into ESP curricula; in others, instruction relied solely on printed materials. Without systematic training and institutional support, even the most sophisticated tools remained underutilized. These challenges highlight a key pedagogical implication: technology alone does not guarantee instructional effectiveness. It must be pedagogically contextualized, goal-oriented, and supported by teacher training that aligns digital methods with cognitive principles of vocabulary learning.
Importantly, the role of technology in this study was not conceptualised as a separate instructional component but as a mediating layer within discourse-based vocabulary learning. Digital tools proved most effective when they supported learners’ engagement with professional texts by enhancing noticing, comparison, and reflection. This finding aligns with views of technology as a cognitive amplifier rather than a substitute for pedagogical design.
5.3 The role of professional texts in motivation and identity formation
An important finding concerns the motivational and identity-related function of professional texts. When students encountered authentic materials—clinical reports, pharmaceutical guidelines, or engineering documentation—they expressed heightened interest and emotional engagement. Such materials were perceived not merely as exercises in language learning but as mirrors of their future professional reality. Students frequently described the experience as “stepping into their profession,” associating vocabulary learning with a sense of belonging to an expert community.
This phenomenon reflects a deeper process of disciplinary socialization: through engagement with authentic discourse, learners gradually internalize not only the language but also the epistemological values and communicative norms of their field. Reading a case report, interpreting a patient history, or summarizing an experiment in English thus becomes an act of identity construction. Vocabulary functions as a linguistic bridge connecting academic learning with professional practice, fostering both motivation and confidence. Consequently, ESP instruction serves a dual purpose—linguistic competence and professional enculturation—both of which are essential for preparing students for participation in international scientific communication.
This identity-related dimension of vocabulary learning supports sociocognitive views of ESP, according to which language development is inseparable from participation in disciplinary practices. The findings suggest that specialised vocabulary functions not only as a linguistic resource but also as a marker of professional membership, reinforcing the idea that ESP instruction contributes to learners’ gradual socialisation into expert communities.
5.4 Toward a pedagogical framework for vocabulary instruction
Synthesising the empirical findings, the study proposes a discourse-mediated input–processing–output model for specialised vocabulary development in ESP. Unlike linear or component-based approaches to vocabulary teaching, this model conceptualises lexical development as a recursive process embedded in professional discourse and genre enactment. Within the model, input is represented by authentic professional texts that introduce specialised vocabulary in its natural discursive environment. Processing involves guided cognitive engagement through genre analysis, semantic mapping, collaborative meaning negotiation, and technology-supported noticing. Output requires learners to enact specialised vocabulary in discipline-specific genres through writing and speaking tasks, enabling lexical transfer and stabilisation. Crucially, the model positions teacher mediation and digital tools as cross-cutting mechanisms rather than separate instructional stages. Teacher scaffolding supports metacognitive awareness and genre sensitivity, while digital resources function as mediating tools that enhance pattern recognition, consolidation, and self-regulated learning. Vocabulary development thus emerges from the interaction between discourse, cognition, and pedagogical design rather than from isolated exposure or memorisation.
Authentic professional texts must be carefully selected to represent the communicative genres most relevant to learners’ future professional contexts—clinical reports, scientific abstracts, laboratory protocols, or technical manuals. Vocabulary instruction should extend beyond definitional learning to encompass semantic networks, collocational behavior, and pragmatic use. The ultimate goal is to enable learners to use terminology as a tool of reasoning, interaction, and problem-solving.
Pedagogical tasks should stimulate higher-order cognitive processes such as analysis, synthesis, and reformulation. Such tasks include, for instance, summarising technical documentation for non-specialist audiences, annotating research abstracts to identify hedging and modality, transforming written terminology into oral case presentations, and producing reflective commentaries comparing professional discourse across languages, thereby promoting not only lexical precision but also discourse adaptability and metacognitive awareness.
Digital tools, meanwhile, should be embedded strategically rather than superficially. Learning Management Systems can integrate glossaries, corpora, and self-assessment tools into a unified environment. Mobile learning platforms can extend practice beyond the classroom, enabling micro-learning and immediate feedback. Artificial intelligence applications—particularly automated text analysis and adaptive vocabulary trainers—offer new opportunities for personalization and progress tracking. Yet, their integration must follow pedagogical objectives, ensuring that technology enhances, rather than replaces, cognitive engagement.
Unlike linear models of vocabulary instruction, this framework conceptualises learning as a recursive process in which exposure, processing, and output continuously inform one another within genre-specific contexts. Its empirical grounding distinguishes it from prescriptive teaching models by anchoring instructional stages in observed classroom practices and learner responses.
5.5 Limitations of the study
While the findings provide meaningful insights into specialized vocabulary development in ESP, several limitations should be acknowledged. First, the study's duration was limited to eight weeks, which may be insufficient to observe the long-term retention of acquired terminology. Second, the assessment of learning outcomes relied primarily on classroom observations and participant self-reports (interviews and focus groups) rather than objective longitudinal measurements or standardized pre- and post-tests. Therefore, the observed improvements should be interpreted as perceived gains rather than definitive evidence of increased vocabulary size. Finally, given the specific institutional contexts in Uzbekistan and the relatively small sample size (N = 84), the findings may have limited generalizability to other geographical regions or significantly different academic disciplines.
6 Conclusion
This study set out to examine how specialised vocabulary can be taught more effectively in ESP contexts through the integration of professional texts, genre-based pedagogy, and digital support. Drawing on classroom-based empirical data, the findings demonstrate that vocabulary development is most successful when instructional practices align lexical learning with disciplinary discourse and authentic communicative purposes.
The integration of authentic professional texts not only supports vocabulary acquisition but also facilitates learners’ exposure to the discourse practices, rhetorical structures, and pragmatic norms of their future professions. These texts provide a linguistically rich environment in which students encounter terminology in situ—within the context of real-world problems, reasoning, and documentation. As a result, learners are better positioned to comprehend and produce field-specific communication in academic, clinical, and technical settings.
The primary contribution of this study lies in the formulation and empirical grounding of a discourse-mediated input–processing–output model for specialised vocabulary development in ESP. The model reconceptualises specialised vocabulary not as a discrete linguistic component but as a functional resource that develops through genre enactment, cognitive processing, and pedagogical mediation. By demonstrating how professional texts, learner output, and digital tools interact within a coherent instructional logic, the study offers both a theoretical contribution to ESP research and a transferable pedagogical framework for designing discourse-oriented vocabulary instruction in terminologically dense disciplines.
Based on these findings, the study highlights several pedagogical implications. ESP curricula benefit from the systematic inclusion of authentic professional texts that reflect the communicative practices of the target field. Instructor training in genre analysis, corpus-informed pedagogy, and digital tool integration further supports effective vocabulary instruction. In addition, instructional materials increasingly require a genre-driven, task-based orientation, while institutional investment in digital infrastructure remains a key condition for sustainable technology-enhanced vocabulary learning, particularly in resource-limited contexts.
Future research may adopt longitudinal and experimental designs to measure the impact of these instructional strategies on student performance over time. Studies might also explore the scalability of genre-based and digitally supported vocabulary instruction across different academic disciplines, cultural contexts, and proficiency levels.
In conclusion, teaching specialised vocabulary through professional texts is not merely a matter of lexical enrichment; it represents a strategic approach to preparing learners for the demands of professional communication in a globalised academic and professional environment. By positioning specialised vocabulary as a functional resource for professional thinking and communication, this study underscores the central role of discourse-oriented instruction in preparing ESP learners for participation in global academic and professional communities.
Statements
Data availability statement
The raw data supporting the conclusions of this article will be made available by the authors, without undue reservation.
Ethics statement
Ethical review and approval was not required for the study on human participants in accordance with the local legislation and institutional requirements. Written informed consent from the participants was not required to participate in this study in accordance with the national legislation and the institutional requirements.
Author contributions
II: Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing.
Funding
The author(s) declared that financial support was not received for this work and/or its publication.
Conflict of interest
The author(s) declared that this work was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
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Summary
Keywords
English for specific purposes, lexical transfer, professional genres, specialised vocabulary, technology-mediated learning
Citation
Israilova I (2026) Developing specialised vocabulary in ESP through professional texts: a genre-informed, technology-supported input-processing-output model. Front. Educ. 11:1829270. doi: 10.3389/feduc.2026.1829270
Received
12 March 2026
Revised
12 May 2026
Accepted
13 May 2026
Published
28 May 2026
Volume
11 - 2026
Edited by
Nabiha El Khatib, Lebanese International University, Lebanon
Reviewed by
Hazleena Baharun, Islamic Science University of Malaysia, Malaysia
Yasser Alrefaee, Albaydha University, Yemen
Updates
Copyright
© 2026 Israilova.
This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
*Correspondence: Ilona Israilova ilona1israilova@gmail.com
Disclaimer
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.