An experimental study of psychophysiological and behavioural indicators of nonconscious emotional reactions in a clinical sample
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1
Faculdade de Psicologia, Universidade de Lisboa, Portugal
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2
Universidade Lusófona, Portugal
Emotional automatic reaction in psychopathology have seldom been studied in experimental settings. Comparing three emotion conditions, positive, negative and neutral, we used a subliminal emotion priming paradigm to elicit emotions that the subject was not aware and observed their effects on behavioural reactions of approach/pleasure and avoidance/displeasure expressed and also ERP waveforms elicited by each emotion condition. The experimental paradigm consisted in masking presentation of visual emotion stimuli that were made subliminal by the time of presentation (49ms), by the masking backward and forward and by the task in which the participant’s attention was directed to the mask (non-figurative neutral) stimuli. The sample were 11 participants with BSI scores higher than the clinical criteria value. Behavioural data: as could be expected the more frequent subjective responses of approach/pleasure were associated with the emotion priming positive and negative. The neutral priming elicited displeasure/avoidance behavioural responses. ERPs waveforms recorded, respectively, synchronously with each experimental condition through 64 channels biosemi EEG system. These waveforms were offline averaged and regressed to the mean of the 125ms of baseline pre-stimuli presentation. The amplitude differences in the late latency time windows 390 ms were significant for right Fronto-Temporal and Posterior-Parietal EEG lead. The amplitude modulation was congruent with subjective responses, positive and negative priming condition elicited the higher amplitude of ERP waveforms compared to the neutral condition. In future studies the meaning of this psychophysiological indicator of nonconscious priming will be explored in a correlational study between Behavioural data, ERPS amplitude waveforms and Clinical Self Report Measures
Keywords:
Psychophysiology,
Emotional reactions,
ERP´s,
Symptomatology,
Affective Neuroscience
Conference:
XVI Meeting of the Portuguese Society for Neuroscience (SPN2019), Lisboa, Portugal, 30 May - 1 Jun, 2019.
Presentation Type:
Poster presentation
Topic:
Psychiatric Disorders / Addiction
Citation:
Faustino
B,
Fonseca
I,
Baião
M,
Branco Vasco
A,
Lopes
P and
Oliveira
J
(2019). An experimental study of psychophysiological and behavioural indicators of nonconscious emotional reactions in a clinical sample.
Front. Cell. Neurosci.
Conference Abstract:
XVI Meeting of the Portuguese Society for Neuroscience (SPN2019).
doi: 10.3389/conf.fncel.2019.01.00010
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Received:
28 Feb 2019;
Published Online:
27 Sep 2019.
*
Correspondence:
Dr. Bruno Faustino, Faculdade de Psicologia, Universidade de Lisboa, Lisbon, Portugal, brunofaustino.psicologia@gmail.com