Online cognitive-behavioral intervention for stress among English as a second language teachers: implications for school health policy

Introduction Stress is one of the highest-ranked work-related injuries worldwide and has become almost universal among the Nigerian workforce. English as a Second Language (ESL) teachers face enormous work-related threats that lead to occupational stress. When ESL teachers are stressed, students' language development and entire educational progress are at risk. This is mostly underscored as English, though a second language, serves as the language of instruction in Nigerian schools. As a result, managing occupational stress is particularly important for ESL teachers, as it is among the definitive ways of improving ESL learning and overall educational outcomes. This study examined the effectiveness of online cognitive behavioral intervention (o-CBI) in lowering occupational stress among ESL teachers. Method ESL teachers with at least 1 year of experience were among the participants (N = 89). Participants were divided into two groups: the intervention group (N = 44) and the control group (N = 45). For 9 weeks, the experimental group engaged in nine sessions of 2 h of the o-CBI program. The Single Item Stress Questionnaire (SISQ), the Satisfaction with Therapy and Therapist Scale-Revised (STTS–R), and the Teachers' Stress Inventory (TSI) were the measures used to collect primary and secondary data. Four sets of data were collected at baseline, post-test, and follow-up 1 and 2 evaluations. The data were analyzed using mean, standard deviation, t-test statistics, repeated measures ANOVA, and bar charts. Results and discussion Compared to the control group, the o-CBT group had significantly lower TSI scores at the post-test (Time 2) and follow-up evaluations (Times 3 and 4). Between pre-, post-, and follow-up 1 and 2 measurements, there were no significant differences in occupational stress index scores in the control group. It was concluded that o-CBI is effective in job-stress treatment among ESL teachers. In addition, implications for school health policy are discussed. The o-CBI for occupational stress was well received by the participants, showing high acceptability among ESL teachers.

Introduction: Stress is one of the highest-ranked work-related injuries worldwide and has become almost universal among the Nigerian workforce.English as a Second Language (ESL) teachers face enormous work-related threats that lead to occupational stress.When ESL teachers are stressed, students' language development and entire educational progress are at risk.This is mostly underscored as English, though a second language, serves as the language of instruction in Nigerian schools.As a result, managing occupational stress is particularly important for ESL teachers, as it is among the definitive ways of improving ESL learning and overall educational outcomes.This study examined the e ectiveness of online cognitive behavioral intervention (o-CBI) in lowering occupational stress among ESL teachers.
Method: ESL teachers with at least year of experience were among the participants (N = ).Participants were divided into two groups: the intervention group (N = ) and the control group (N = ).For weeks, the experimental group engaged in nine sessions of h of the o-CBI program.The Single Item Stress Questionnaire (SISQ), the Satisfaction with Therapy and Therapist Scale-Revised (STTS-R), and the Teachers' Stress Inventory (TSI) were the measures used to collect primary and secondary data.Four sets of data were collected at baseline, post-test, and follow-up and evaluations.The data were analyzed using mean,

Introduction
Work-related stress constitutes approximately 85% of psychosocial workplace risky exposures (1,2), and chronic stress accounts for increased work-related injuries that endanger workers' health and wellbeing (3-5).Normally, employees become overwhelmed by work-related stress (6) due to a mismatch in time, resources, and work demands from colleagues, bosses, or other structures of the organization (2,7).Psychological stress indicates exposure to intense traumatic experiences that can cause anxiety, anger, and sadness in the workplace (8).Stress associated with the occupation is a common issue, affecting approximately 88% of teachers worldwide (9)(10)(11)(12).Compared to other employees in other occupations, teachers are the most stressed (13)(14)(15), and language teaching tends to add more complications that cause increased stress among teachers (16,17).
In education, stress is defined as a frustrating, emotional experience caused by the process of teaching/learning management and is demonstrated in some emotional conditions, including anger, strain, anxiety/tension, frustration, or depression (18,19).Stress is a chronic negative experience that endangers educators' self-confidence and wellbeing and jeopardizes the educational process (20).Teaching English as a second language (TESL) is even more challenging, and ESL teachers are twice more likely to be stressed than other language teachers and about three times more vulnerable to job stress than other employees (21-23).Teaching English as a second language necessitates high English language skills as well as pedagogical skills, which are most often lacking in teachers who often struggle with English because they are not native English speakers (19,23).ESL teachers may experience heightened stress because of the unique need for appropriately modified training, which can be stressful for instructors (14,20).
Consequently, teachers of ESL tend to be more vulnerable to increased stress due to reduced professional resources (24)(25)(26), poor professional development (27), and poor salaries (28).A survey study (25) found that 80% of ESL teachers in Namibia lack teaching materials and resources that create the learning environment.Nigerian-based studies (29, 30) found similar challenges, exacerbated by little or no contact with first-language English speakers and with no background knowledge to enhance communication in English (31).Such conditions tend to increase teachers' responsibility to build learners' communication skills in English, thereby increasing teachers' job stress (19,25).
Job stress among ESL teachers has negative implications for their psychosocial wellbeing, the students they teach, and the entire education system (20, 23).Extant literature suggests that workplace stress tends to undermine/or weaken teachers' job performance (32)(33)(34)(35)(36). Stress may lead to increased depression cases among teachers (23), which has far-reaching effects on school health outcomes (37).
Similar to the findings in other countries, high stress levels have consistently been the outcome of research on ESL teachers in Nigeria (30).However, studies in the Nigerian context with regard to stress among ESL teachers are very scarce.The few studies available on stress among ESL teachers in Nigeria were survey studies with large samples, suggesting that stress is widespread (29).While most of such studies present similar narratives regarding ESL teachers' stress, not many Nigerian studies have delved into stress management among the population.This suggests the need for stress management intervention among ESL teachers (16,38).With the increasing need for building students' skills in the use of English in Nigeria (21, 30), there is an urgent requirement for supporting teachers in obtaining the maximum output on students' outcomes.In this randomized trial, we employed an online cognitive-behavioral intervention to reduce occupational stress among ESL teachers in Plateau State, Nigeria.This study is expected to benefit both the ESL teachers, the school, and the students, as it will ultimately improve school social, health, and academic outcomes, especially as English is used as a medium of instruction in Nigeria.

Job stress
Stress arises if there is a conflict between external demands/events and the individual's capacity to deal with such events or activities (39).There are three major dimensions or models in which stress might be experienced: the stimulus-based model, the response-based model, and the cognitive transactional process model (39, 40).The stimulus-based perspective is of the view that stress occurs when there are objectively activating events called stressors (40).According to this model, stress level is simply a measure of stress sources or stressful events/experiences.
From this perspective, the response-based model is based on the stance that stress is the emotional, physiological, and behavioral reaction/response to the objective stressor.In this regard, an individual's stress level is a combination of stress sources and subjective personal factors/modifiers, such as their interpretation/cognition perspective on the stressor.According to the transaction-based model, stress is caused by negative sensory interpretations/cognitions about the triggering condition (39,41,42).This model holds that stress is the subjective feeling of emotional, behavioral, and physical symptoms that are consequential to the interaction between the stimulus and the response (39,42).In this study, we followed an encompassing approach to define stress as both the process and product of the interaction between stressors, the perception of stressors, and the symptomatic outcomes following the interaction between stressors and the outlook.Based on this eclectic viewpoint, we define job stress, which is our study variable.
Job stress is described as a negative subjective emotion that occurs when a worker's perceived personal and social skills to suitably deal with work demands exceed the needs of the job (43).It is a typical event in the lives of teachers, but it turns negative when they become chronically activated as a result of prolonged exposure to stressors and a dysfunctional attitude toward their work.This results in major consequences for cognitive, bodily, and/or emotional health (44).Job stress can also be explained as damaging bodily and psycho-emotional reactions that follow when an employee lacks the capabilities and resources to cope with their work requirements (12).Operationally, job stress refers to the psycho-physiological condition where the perceived workrelated demands become so overpowering that they have negative effects on employees' emotional and physical health.Thus, job stress includes both the perceived stress sources associated with a job and the symptomatic reactions due to such sources.
Job stress is generally caused by working conditions (e.g., workover/underload, long hours, too many decisions, deadlines, and time pressures); organizational roles (e.g., role ambiguity, role conflict, responsibility for people and things, lack of participation in decision-making, lack of support, and poor standards of performance); poor interpersonal relationships at work (e.g., workover/underload, long hours, too many decisions, deadlines, and time pressures); and poor career development (feelings of getting stagnated, under/over promotion, lack of job security, and fear of redundancy).
Employees' productivity, physical health, and overall wellbeing are jeopardized by increasing occupational stress (34,(44)(45)(46).Job stress leads to both physical and mental health symptoms (47,48), including posttraumatic stress disorders, sleep disorders, depression, and anxiety (49).It is also implicated in fatigue/burnout (10,50,51), absenteeism, inefficiency, attrition (39, 52), and suicidal attempts (53).Physical symptoms such as headaches, decreased immunological function, increased musculoskeletal pain, and cardiovascular disorders have also been linked to occupational stress (54).Thus, in this study, job stress is addressed as a measure of both perceived sources of stress and their symptomatic manifestations.

The Nigerian context regarding the development of English as a second language
Learning English as a second language is challenging and requires complex skills (55).In Nigeria, learning English as a second language has become vital and forms the basis for the entire education system.At the basic education level in Nigeria, two main languages are used in class instruction: the mother tongue and the English language (56,57).While the mother tongue is used for teaching at the junior basic education level, the English language is used from the senior basic education level through the subsequent levels of education (58).Though a second language, the English language is also increasingly used as the official language in Nigeria (57), making it imperative in the education system.Thus, ESL is an integral part of the Nigerian educational system from the primary to the tertiary levels (57,59).
Despite English being the second language in the Nigerian education system, the teaching and learning process faces challenges due to a shortage of qualified English teachers (55), inadequate training for teachers, and poor subject delivery (60-62).However, ESL students may present additional challenges, including those associated with grammar, pronunciation, vocabulary, slang, colloquialisms, and sentence structure (63).Hence, L2 teachers experience great difficulty in making students understand the teaching contents in English (64) and making mindful efforts to build reading and writing proficiency.Consequently, teachers who teach ESL in Nigeria are presented with high levels of demands that can leave them overwhelmed and highly stressed, which requires intervention.

Online cognitive behavioral intervention
The online cognitive behavioral intervention (o-CBI) is based on the cognitive behavioral therapy (CBT) developed by Beck (65).According to Beck's cognitive model, people's perceptions of events (cognition/thought) influence their feelings and behaviors (see Figure 1).What people feel about an event is a product of the way in which they interpret the event itself (65).The intervention model conceptualizes cognition at three levels: core beliefs, dysfunctional assumptions, and negative automatic thoughts (66).Core beliefs are schemas, which are deeply constructed beliefs about oneself, others, and the world.Dysfunctional assumptions are inflexible conditions that people adopt for living, while negative automatic thoughts (NATs) are involuntarily triggered thoughts about certain situations (66).Cognitive behavioral intervention (CBI) teaches clients to become their own therapists by assisting them in making sense of their current thoughts and behavioral patterns and helping them develop the skills needed to change dysfunctional patterns.
Different intervention techniques based on scientific evidence and practical efficacy have been used under cognitive behavioral therapy (CBT) to reduce stress among teachers (67)(68)(69).Internetbased stress-reducing CB intervention has been found to have small to moderate effect sizes compared to controls in both meta-analyses (70) and control trials (71,72).It is not clear how o-CBI can be effective in reaching rural populations.Further investigation into the effect of o-CBI on ESL teachers reporting elevated stress and suffering from stress-related disorders is necessary to ensure the development of a high-quality policy structure for school mental health.Online CB interventions are delivered using electronic media in CBT modalities.Online CBI for stress is a technologybased intervention framework for reducing stress (73).It is meant to draw from occupational experience the skills necessary to develop resilience for managing stress and associated hazards in workplaces (74).
The o-CBI is based on the conviction that health-related reactions to job experiences (including stress) arise following a dysfunctional belief that accrues from work challenges (75).CBT uses psychological tools to argue and attack flawed feelings, fuzzy cognitive dispositions, and dysfunctional behaviors toward work and work experiences and to improve the professional wellbeing of workers (76).Furthermore, given the complex nature of stress-related health challenges and the time and financial cost of face-to-face group intervention, an online intervention approach was recommended for stress management (71,73,(77)(78)(79).In the o-CBI context, online modules of CBT are implemented as either individualized self-help modalities or as a guided program based on either individual or group needs (73,74).
Compared to traditional face-to-face therapy, online cognitive behavioral interventions could provide participants with more flexibility regarding when and where they can access the support program (80).In an undefined setting, it lowers the cost of therapeutic visits and improves support-seeking abilities (81).In this trial, o-CBI was given as a group therapy through videoconferencing, WhatsApp chats, and emails.The online component of treatment is made available in mobile apps to allow clients to participate in therapy and complete homework projects by themselves.Online therapy, according to Ong et al. (82), has the advantages of connectivity, reduced prices, and a relatively low time commitment for both therapists and clients; it helps clients take a more active role in treatment, maintains their motivation and momentum, and facilitates the exchange of information and images between participants and therapists to monitor client progress and improve transparency.

The current study
While ESL teachers report heightened stress, no study has used online CBI programs to help them reduce job stress.Most of the related literature studies were delivered by populations other than ESL teachers.No study in the literature uses the o-CBI to reduce stress among ESL teachers.In addition, there is a lack of empirical information regarding whether ESL teachers would be satisfied with o-CBI.The current study offers insights into using o-CBI for stress reduction in ESL teachers.In addition, participants' satisfaction with o-CBI was explored.

Research questions and hypotheses
The study was guided by the following questions: (i) Will o-CBI lead to a significant reduction in stress among ESL teachers?(ii) Will changes in job stress brought about by exposure to o-CBI among teachers be sustained over follow-up time?We, therefore, hypothesize that o-CBI would lead to a significant reduction in job stress among ESL teachers.We further claim that the o-CBI group will lead to a sustained and significant decrease in job stress in the experimental group over those in the control group.

Materials and methods
Ethical considerations: The Faculty of Educational Research Committee, a university in Nigeria, provided ethical permission for this study.The study was also registered prospectively in the American Economic Association's registry for randomized control trials, with ID AEARCTR-0005471.The study also met the American Psychological Association's (APA) and World Medical Association's (WMA) research ethical standards (83, 84).The study participants also gave their informed written consent.

Measures
The single item stress questionnaire One of the inclusion/exclusion criteria for the study was this single-item measure of stress symptoms.In stress studies, the instrument has repeatedly been confirmed to be valid and trustworthy (85,86), showing Chronbach's alpha reliability indices ranging from 0.80 to 0.86.The instrument uses the question, "Stress means a situation when a person feels tense, restless, nervous, anxious, or unable to sleep at night because his or her mind is troubled all the time.Do you feel that kind of stress these days?"The SISQ is scored on a 5-point scale, with 1 being "not at all" and 5 being "very."In this study, low stress was assigned a score of 1-2, moderate stress was assigned a score of 3, and high stress was assigned a score of 4-5.For SISQ, the researcher discovered a Cronbach's alpha reliability index of 0.79 among 20 adult Nigerian workers.

The teachers' stress inventory
This is a questionnaire used by teachers to assess their stress levels.The TSI ( 87) is a 49-item questionnaire with a four-point Likert scale that was employed in this investigation.The instrument has 10 subscales that cover two major stress dimensions: stress sources (SS) and stress manifestations (SM).The SS subscale measures sources of stress and management practices, while the SM subscale measures physiological and psychological symptoms of stress (87).The TSI by Fimian ( 87) is quite old but has remained the best scale for measuring teachers' stress across studies (1).Owing to its unbeatable validity, TSI has been widely used in world-standard contemporary studies (88).In South Africa, the TSI was discovered to have good psychometric properties (89, 90).We also conducted a reliability test to determine the instrument's suitability in Nigeria.In this regard, data from 47 Nigerian instructors were subjected to the Cronbach alpha statistic, which resulted in a good reliability coefficient (=0.81).

The satisfaction with therapy and therapist scale-revised
The participants' satisfaction with the o-CBI was assessed using the STTS-R for group psychotherapy created by Oei and Shuttlewood (91).The STTS-R is a 5-point Likert scale with Strongly Disagree (1), Disagree (2), Neutral (3), Agree (4), and Strongly Agree ( 5) options (6).The measure consists of 13 items that address client satisfaction with the therapy, therapist satisfaction, and overall change in the client's condition.The STTS-R has excellent psychometric properties (91).Though the scale is relatively old, it has also proven valid in more recent studies (92) and is continually valuable in measuring the acceptability of internet therapy (93) and other recent clinical studies (94).The STTS-R was trial tested on 47 Nigerian teachers to validate its applicability in the Nigerian setting.Cronbach's alpha statistics yielded an alpha coefficient of 0.67, indicating that the instrument was trustworthy among Nigerian teachers.

Participants
The study included 89 ESL teachers (men = 29; women = 60) who participated in the study.Table 1 contains detailed demographic information about the individuals.The following criteria were used to choose the participants: (a) the participant must have a stress score of 3-5 on the single-item measure of stress symptoms, indicating a moderate to high level of stress; (b) the teacher must be an English language teacher in primary or secondary schools; (c) the participant must have a personal smartphone with a functional email address and must be connected to WhatsApp; and (d) the participant must be willing to submit personal contacts and phone numbers.
In the first stage, information about the intervention was widely shared through WhatsApp, Facebook, calls, emails, and SMS.While disseminating the information regarding the intervention, fliers and a link to the WhatsApp group were shared so that interested potential participants could join the group.A total of 89 of 104 teachers who volunteered to participate in the study were included.The 104 potential participants were evaluated for eligibility using the previously mentioned eligibility criteria.As a result, 15 potential participants were ruled out for failing to meet the inclusion criteria or for other reasons, and the 89 participants who met the criteria were included to participate (see Figure 2).
Accordingly, during stage two, the 89 teacher participants were randomly assigned to the intervention group (44 participants) or the no-intervention control group (45 participants) (see Table 1).Until the intervention was assigned, the participants were kept in the dark about the randomization method.For better communication about the stages of the intervention, the researcher created two more WhatsApp chat groups (one each for the intervention and the no-intervention control groups) and added the participants accordingly.Stage three involved baseline data collection, where both the intervention and no-intervention control groups were given a pretest utilizing TSI and SRS-18 to determine the baseline (Time 1) data.All data collected at the baseline were compared with the post-and follow-up data.
During stage four, the participants in the intervention group were exposed to o-CBI for a total of nine sessions (see Table 2), while those in the control group were waitlisted and received the intervention after the post-treatment evaluation only on individual request.For the intervention group, the o-CBI module was shared in the group after every 7 days.The participants were made to undergo the sessions alone and completed a practice activity after each session.Each participant was able to access the sessions at their own pace, provided that each session was completed, and all worksheets were completed and submitted to the researchers via email within a week before another session was shared.During the sessions, the therapists could take personalized calls, emails, and private chats to respond to the participants' queries.
During stage five, post-test (time 2) data were collected from both the intervention and the control groups.This occurred 2 weeks following the final intervention session.Furthermore, 3 and 6 months following the post-test evaluation, follow-up online interactions and data collection (Time 3 and 4) were conducted.Finally, the intervention program for the interested waitlisted group began immediately after the 6-month followup examination.The technique was the same as that for the intervention group.One of the researchers, along with four research assistants, conducted and facilitated the intervention (two experts in CBT and two occupational therapists-PhD students who were conversant with online interventions).All of the research assistants were remunerated for their study.To ensure active involvement in the intervention sessions, the researcher sent reminder messages to the participants via the WhatsApp app 1 day before the module completion deadline elapsed.The researcher was also available to answer specific questions and demands of the participants via WhatsApp and phone conversations.All the assessments were completed by completing the module in soft copies and emailing it.The intervention sessions and evaluations were conducted entirely in English.During the analysis, each assessment data point from the intervention group was compared to the data collected from the control group.

Intervention
The o-CBI intervention comprises nine sessions of weekly online modules of CBT for stress, developed by researchers from earlier studies (66,73,74).The intervention was anchored on using cognitive and behavioral strategies (66) to address ESL teachers' stress by linking them to the explanatory models of stress and stressful experiences in teaching ESL.Based on the perspective used in this study, teachers' high levels of stress reactivity could be linked to their faulty perspective of their experiences rather than a direct result of their job pressures (6,95).To this end, the negative cognitive judgment of job experiences may cause negative emotional and physical reactions (stress), limiting occupational outcomes (75).Changing perceptions toward the job through the cognitive behavioral intervention helped manage the negative reactions associated with job stressors.The o-CBI stress management intervention for ESL teachers is complete without face-to-face therapeutic contact or support but was delivered through an e-learning system, where group intervention meetings were held through videoconferencing and continuous sharing of ideas and materials via WhatsApp and emails.
The program contents are shown in Table 1.The total of nine sessions of the o-CBI program involve tasks relating to psychoeducational stress management and cognitive behavioral therapy.The intervention was planned to develop three basic stress-coping skills: problem-solving, relaxation, and emotion regulation (96).It further involves nine modules that participants work on while engaging in a weekly meeting schedule.Each module is made up of general information, audio and video files, interactive exercises, and worksheets in downloadable format, which participants complete and share with therapists.In addition, participants accessed information on stress-related topics, including time management, worrying, rumination, feelings of psychological indifference to work, sleeping habits, nutrition, social support, and exercise (96).
Participants underwent the o-CBI sessions online from the comfort of anywhere and could complete assignments within the stipulated period.
In the first two sessions, participants were exposed to an understanding of the models of stress coping mechanisms through psychoeducation and cognitive and behavioral techniques (66, 73).
All sessions were held online through Zoom videoconferencing.Modules and activity materials, such as audio and video files, interactive exercises, and worksheets, were shared through email 48 h prior to each session to enable the participants to take the time to engage with the materials before the group interactions.Moreover, the therapist's line was open 24 h a day for individual therapeutic relationships.Though the weekly therapy sessions were held as group sessions, clients could contact the therapists for questions and clarifications via WhatsApp messages, calls, and emails on an individual basis.After each session, the participants were asked to complete all the worksheets in the form of homework assignments, which were submitted at any time before the subsequent session.Participants used the program both synchronously and asynchronously, as it was possible for individuals to access materials at any time, yet they were expected to participate in group meetings each week.Thus, the therapist played the role of a facilitator during the intervention period.Subsequent sessions involved cognitive restructuring and adopting functional, rather than irrational, thought styles, as summarized in Table 1.

Recruitment, response rates, dropouts, and adherence
We obtained informed approval from the potential participants before recruiting.A total of 104 people responded to the request to participate in the study; however, only 89 of them were accepted.Others were turned away because their qualifications did not fulfill the standards.All the 89 participants strictly adhered to the study protocol.The 44 participants in the intervention group completed all the intervention sessions and assignments.However, out of the 45 participants in the waitlisted group, only 20 indicated interest and were exposed to the compensatory intervention thereafter.As a result, there was a high percentage of adherence to this trial.In general, the participants replied quickly to online interactions, with only a few exceptions.Homework assignments were duly completed.

Design and data analyses
With pretest, post-test, and follow-up evaluations, the current investigation used a group-randomized waitlist control trial design (97).The researcher used this design to evaluate the impact of the o-CBI on the occupational stress of ESL teachers.There were two groups of participants: the intervention (o-CBI) and control (waitlisted) groups.Demographic data were presented in numbers and percentages.The baseline data were analyzed using t-test statistics.To compare baseline, post-intervention, and follow-up 1 and 2 data, a repeated measures ANOVA was employed.The effect size of the intervention on the dependent measure was estimated using partial Eta square analysis.Post-hoc analysis was employed to ascertain the group × Time differences in the TSI scores of participants.The percentage was used to analyze the data collected through STTS-R to assess how satisfied the participants were with their therapy.

Results
The participants' personal demographics are presented in Table 1.Men made up 32.58% of the participants, while women made up 60 (67.42%).The o-CBI group consisted of 15 (16.85%) men and 29 (32.58%)women, while the control group consisted of 14 (15.73 percent) male teachers and 31 (34.83 percent) female teachers.
In addition, within the o-CBI groups, 11 participants (12.35%) had 1-2 years of experience, and 14 participants (15.73%) had 3-5 years of experience.Similarly, within the control group, 14 participants (15.73%) had 1-2 years of experience, 17 participants (19.10%) had 3-5 years of experience, and 14 participants (15.73%) had above 5 years of experience.For the o-CBI and the control group, the average age of the participants was 31 This indicates that both the o-CBI and control groups had similar sources of job-demand perception (o-CBI group = 3.59; control = 3.42, 39).The stress manifestation (SM) ratings of the intervention group and the control group did not also differ significantly at baseline (t = 2.28, p = 0.520; η² p = 0.02).The total TSI rating of participants in the o-CBI and control groups did not differ substantially between the o-CBI group and the control group (t = 2.16, p = 0.492; η² p = 0.001).This difference suggests that the participants in both groups not only perceived their employment as demanding but also had stress-related symptoms, according to the mean ratings of the two groups.The minimal η² p in each case further strengthened the lack of a score difference based on the group.
Table 3 further indicates the scores for SS, SM, and TTSIS of both the o-CBI and control groups during the post-test, follow-up 1, and follow-up 2 assessments.At Time 2, 3, and 4 (post-treatment) evaluations, the data revealed significant effects of o-CBI on all the stress dimensions (SS, SM, and TTSI).The participants in the o-CBI group had a substantially lower mean score in the SS subscale compared to the control group at Time 2 (p = 0.000, η² p = 0.56); Time 3 (p = 0.000, η² p = 0.47); and Time 4 (p = 0.000, η² p = 0.77).Further, the mean rating of the o-CBI group for stress manifestation (SM) decreased significantly as compared to the control groups at Time 2 (p = 0.000, η² p = 0.88); Time 3 (p = 0.000, η² p = 0.85); and Time 4 (p = 0.000, η² p = 0.68).This consistent reduction in the SM score for the o-CBI group indicates that the reduction in stress manifestation was maintained.This suggests that o-CBI could lower individuals' negative perceptions of work-related stress and mitigate their stress symptoms.The total stress score (TTSIS) of the o-CBI group was significantly lower than that of the control group at the post-test (Time 2) (p = 0.000, η² p = 0.79); follow-up 1 (Time 3) (p = 0.000, 2 = 0.72), and follow up 2 (Time 4) (p = 0.000, η² p = 0.71).These primary outcomes provided a detailed description of how o-CBT deflated teachers' stress both in part (both SS and SM dimensions) and globally (TTSIS) from pre-to post-intervention and follow-up tests.
A simple main effect analysis was performed using repeated measures ANOVA only for the total TSI score (TTSIS) and is presented in Table 4.The data in Table 4 further shows that the global stress scores of the o-CBT and control groups did not vary significantly at Time 1-before the intervention (p > 0.001) but varied significantly at the post-test (Time 2), follow-up 1 (Time 3), and follow-up 2 (Time 4), with a p-value of <0.001 for each case.
Taking into account the measures obtained at Times 1, 2, 3, and 4, the within-subject effect analysis in Table 5 shows a significant effect of time on the TSI scores of the o-CBT group (p < 0.001, η² p = 0.46).The partial eta square indicates a relatively high effect size.This indicates that the mean scores of the o-CBI group varied significantly across Times 1, 2, 3, and 4. Further, the Time X Group interaction effect indicated significant values, with a high effect size (p < 0.001, η² p = 0.56) (also see Figure 3).This means that the difference in the group's TSI scores across time was due to the o-CBI intervention and not just because of the time difference.
We also conducted a between-subject effect to ascertain the effects of the group on the mean TSI scores of the participants (Table 6).The data presented in Table 6 show that there was a significant difference in the participants' TSI mean scores based on the group (2.95 × 10 −33 ), with a very high effect size, as indicated by the high value of partial eta square (η² p = 0.81).This suggests that the o-CBI led to a significant difference in the TSI score compared to the control group.
The post-hoc analysis presented in Table 7 shows that the o-CBI group varied significantly in their TSI scores from Time 1 to 2 (mean difference = 1.78; p < 0.001).This indicates that there was a reduction of 1.78 in stress levels following the o-CBI.Further, there were non-significant changes in the TSI scores of the o-CBI group from Time 2 to 3 (mean difference = −0.05;p > 0.001) and from Time 3 to 4 (mean difference = −0.05;p < 0.001).This suggests that the reduction in the level of stress following the o-CBI was relatively stable and sustained; however, this outcome surprisingly showed that, though the improvement was sustained, it did not continue over time.
The data in Table 7 further show that the TSI scores of the control group did not change significantly over Time 1-2 (mean difference = −0.18;p > 0.001); Time 2-3 (mean difference = −0.01;p > 0.001); and Time 3-4 (mean difference = −0.00;p > 0.001).These indicate that the TSI scores of the control group were stable across times of evaluation, strengthening the idea that o-CBI was accountable for the changes that occurred in the intervention group.Figure 3 further demonstrates how TSI scores changed over time in the o-CBI and control groups.This outcome is presented in the bar chart (Figure 3).
To measure the participants' satisfaction with the o-CBI, we collected secondary data using the Satisfaction with Therapy and Therapist Scale-Revised (STTS-R).Table 5 and Figure 4 show the data gathered in this regard.The majority of the participants [81 (91.01%)] expressed high levels of satisfaction with the therapy they received.A total of 76 (85.39%) patients mentioned that they were very happy with their therapists, and 70 (78.65%)patients mentioned that the o-CBI helped them improve their overall health.
According to the participants' ratings in STTS-R (Table 8), 75 of the 89 participants who participated in the intervention (86.2%) were very satisfied with the o-CBI program.These results demonstrate the effectiveness of o-CBI in reducing teachers' levels of stress.Figure 4 shows more information about this outcome.

Discussion
The goal of this study was to confirm the efficacy of o-CBI in lowering job stress among ESL teachers.At baseline, the stress sources (SS) (t = 1.80, p = 0.993), stress manifestation (SM) (t = 2.28, p = 0.120), and total teachers' stress inventory (TTSI) scores (t = 2.16, p = 0.492) of the o-CBI and control groups did not differ substantially.When compared to the control group, the o-CBI resulted in a significant (p = 000) reduction in all dimensions of teachers' stress (SS, SM, and TTSI) at Time 2 (post-test), which was sustained through Time 3 (follow-up 1) and Time 4 (follow-up 2).The findings also demonstrated a significant interaction effect of time and intervention on the measures of participants' stress, suggesting that the decrease in the o-CBI group's stress levels over time was solely due to the o-CBI and not to the passage of time.While the stress levels of the participants in the control group did not alter significantly between baseline, post-intervention, and follow-up assessments, the o-CBI group saw a significant reduction in stress between baseline and post-treatment tests.This indicates that o-CBI alters participants' self-defeating cognition associated with work experience.
The significant reduction in ESL teachers' job stress following the o-CBI demonstrates that, even when objective working conditions remain the same, ESL teachers can change their perceptions regarding stressful experiences, resulting in reduced stress symptoms.The outcomes of this study strengthen other prior studies which show that CBI is effective for stress management.For instance, a number of studies have established the efficacy of cognitive behavioral interventions for stress reduction across the population (71,75,76,88,98).Further studies (74,99) have shown that CBT-based stress management interventions are not only effective for stress but also for anxiety, hardiness, and self-efficacy.
A study by Leung et al. (67) used a brief cognitive-behavioral stress management program for secondary school teachers and found that the intervention effectively reduced stress.Though the result of Lueng and colleagues' study strengthens that of the present study, they used a face-to-face modality of CBI, while the present study intervention was delivered online.With increasing recommendations for the use of telemedicine and online treatment for mental health issues (100, 101), online cognitive behavioral intervention is being widely accepted for the treatment of stress and other mental disorders (93).In a preliminary study, Shirotsuki et al. ( 73 Cognitive behavioral interventions are responsive to managing stress through three stress models: stimulus-based, response-based, and transaction-based models (40).CBI therapeutic modalities may be used to describe stress from all three perspectives, relieving the teachers.According to the stimulus-based model, stress arises when an objectively activating situation called a stressor occurs, whereas stress, according to the response-based model, occurs when emotional, physiological, and behavioral reactions to the stressor occur.Finally, transaction-based research suggests that stress is caused by negative subjective interpretations/cognitions and perspectives regarding a situation/stressor (A) (39,41,42).
The CBI modality lends itself to stress reduction by working on the transactional relationships across the three stress models, including stress as a stimulus, a reaction, and stress as a result of the stimulus (stressor) and response's transactional interactions (perceptions).Hence, CBI provides a framework for disputing negative perceptions of work experiences that lead to stress and has been a valuable approach to stress reduction and building employees' resources for stress management.With online CBI, participants tend to gain more expertise in stress management as they continue to employ these learned skills, and their perceptions of occupations become less stressful (104).
As a result, a previous study (105) found that a positive shift in stress perception can decrease physiological and psychological symptoms linked with job stress.Reduced job stress reduces psychopathological symptoms such as headaches, anxiety, and musculoskeletal difficulties, which can reduce employee effectiveness (106).As a result, reducing stress among ESL teachers may be a functional way to improve their health and classroom effectiveness (34).Improving the job effectiveness of ESL teachers translates to positive health and academic outcomes for the ESL students they teach.Online CBI is a low-cost program that improves the wellbeing and outcomes of instructors of ESL teachers and their students.This study has contributed to the existing pool  The o-CBI intervention was shown to be well liked among participants in the study.Only a few studies have examined treatment preferences, expectations, usefulness, and satisfaction with mixed psychiatric treatments (107).Simon et al. (93) found internet-based CBT agreeable to participants based on a review of empirical studies.The therapy and study protocols were favorably regarded in other trials (93, 108).Participants in the o-CBI can access treatment materials and exercises from the comfort of their homes during online sessions and at their convenience, which reduces the cost of meetings (109).Furthermore, when compared to traditional face-to-face sessions, the o-CBI saves therapists' time.

Study limitations and suggestions for future studies
This study is not without limitations.First, this study used a relatively small sample, which may limit the generalization of the study's results.Further study could apply a larger sample to confirm the effectiveness of the o-CBI.This study did not analyze data based on any mediating variable; future studies may fill this gap by considering mediating variables such as gender, experience, and level of education of the participants.
Intention-to-treat or per-protocol analyses were not conducted; future studies may fill this gap.The o-CBI package could also be tested on different groups of employees who are suffering from chronic stress.Future research could compare the o-CBI and the traditional face-to-face CBI, as the current study did not look into this.Therapists who deal with teachers could consider using o-CBI to manage stress and provide the necessary intervention and support for ESL teachers.This study did not explore secondary outcome data such as depressive symptoms.Further studies can evaluate the presence of depressive symptoms that can result from the high levels of work-related stress among ESL teachers.Future studies could take similar studies further to evaluate depression in ESL teachers using Beck's Depression Inventory (BDI).

Implications of the study for school health policy
The importance of this study for school health cannot be overestimated.The study findings have shown that online cognitive behavioral interventions can be useful for stress reduction in schools, especially for teachers.This may be relevant for the modification of mental health practices in schools in Nigeria and provides a theoretical basis for future policymaking with respect to physical and mental health policies in Nigerian schools.Stress is among the major health-threatening conditions experienced by both teachers and students in Nigeria (45,(110)(111)(112)(113), and schools scarcely have or implement policies regarding stress management.Though the National Ministry of Education has set a comprehensive implementation plan for school safety through Education on Emergencies (114), there is still no policy regarding mental health crises such as stress in schools.
Currently, there is no regular framework to manage teachers' mental health in the Nigerian school system (115).According to Oshodi et al. (116), only 11.1% of school stakeholders had a form of school mental health service in their school; 75.8% confirmed the non-existence of mental health services, while 13.1% were unsure of the existence of mental health services.With the present study showing that o-CBI can effectively minimize stress, this can be built into school stress management policies for improved school health and increased academic performance.Techniques such as e-mental health can be adopted within the school policy system to cure the malaise of stress in Nigerian schools.This means that Nigerian public sector employees can benefit from routine stress management using o-CBI, which is cost-effective and evidencebased.Therefore, this study's outcome presents a viable implication for a new school health policy that will benefit both the teachers and the students.This is specifically important for those stressed about teaching English, which is not their local language.

Conclusion
We conclude that the o-CBI is effective in reducing occupational stress among ESL teachers.The o-CBI for occupational stress was well received by the participants.The o-CBI for occupational stress was well received by the participants, showing high acceptability in the context.

FIGURE
FIGURECBT formulation model of EFL teachers' stress.

FIGURE
FIGUREBar chart showing participants' satisfaction with therapy.
TABLE Summary of the cognitive behavioral therapy session content.

TABLE Participants '
demographic information.
.02 and 33.31, respectively.A total of 51 (57.30%) participants were teachers in elementary schools, while 38 (42.70%) were teachers in secondary Table3displays the t-test statistics of the participants based on TSI subscales (SS, SM, and TTSIS) at the different evaluation times.At Time 1, the mean stress sources (SS) score of the experimental (o-CBI) group and the control group (waitlisted) were non-significantly different (t = 2.05, p = 0.693; η² p = 0.001).

TABLE T -
test analysis of the baseline data on participants' TSI dimensions (SS, SM, and TSI).TABLE Repeated measure ANOVA for the simple main e ects of the o-CBT intervention on the participants' stress scores.Type III Sum of Squares.N, number in group; SD, standard deviation; Df, Degree of Freedom; p, probability value; η²p = partial eta square/effect size.TABLE Repeated measure ANOVA for within-subject e ects.SD, standard deviation; Df, Degree of Freedom; p, probability value; η²p, partial eta square/effect size, ω 2 , Cohen' d effect size.
FIGUREMain e ect of time and intervention on participants' TSI scores.

TABLE Repeated measure
ANOVA for between-subject e ects.

TABLE Post -
) found internet-based cognitive behavior therapy effective in reducing stress among adults.Puertas-Gonzalez et al. (72) used online cognitive behavioral therapy as a psychological vaccine against stress during COVID-19.Kumar et al. (77) found hoc analyses indicating the di erence between groups and times for the global TSI scores.
TABLE Frequency and percentage of participants satisfaction with therapy.knowledge about the efficacy of o-CBI in a non-clinical group setting for stress reduction.It has helped to establish that groupbased o-CBI is valuable for stress treatment among ESL teachers in Nigeria.This outcome can be verified in different locations. of