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Complexities of emotional responses to social and non-social affective stimuli in schizophrenia.

Peterman JS, Bekele E, Bian D, Sarkar N, Park S - Front Psychol (2015)

Bottom Line: The two groups did not differ in their labeling of the emotions evoked by the stimuli, but individuals with SZ were more positive in their valence ratings.Negative symptoms in SZ and disorganized schizotypy in CO were associated with reduced mean fEMG.Importantly, these results suggest disrupted self awareness of internal states in SZ and underscore the complexities of emotion processing in health and disease.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, Vanderbilt University, Nashville TN, USA.

ABSTRACT

Background: Adaptive emotional responses are important in interpersonal relationships. We investigated self-reported emotional experience, physiological reactivity, and micro-facial expressivity in relation to the social nature of stimuli in individuals with schizophrenia (SZ).

Method: Galvanic skin response (GSR) and facial electromyography (fEMG) were recorded in medicated outpatients with SZ and demographically matched healthy controls (CO) while they viewed social and non-social images from the International Affective Pictures System. Participants rated the valence and arousal, and selected a label for experienced emotions. Symptom severity in the SZ and psychometric schizotypy in CO were assessed.

Results: The two groups did not differ in their labeling of the emotions evoked by the stimuli, but individuals with SZ were more positive in their valence ratings. Although self-reported arousal was similar in both groups, mean GSR was greater in SZ, suggesting differential awareness, or calibration of internal states. Both groups reported social images to be more arousing than non-social images but their physiological responses to non-social vs. social images were different. Self-reported arousal to neutral social images was correlated with positive symptoms in SZ. Negative symptoms in SZ and disorganized schizotypy in CO were associated with reduced mean fEMG. Greater corrugator mean fEMG activity for positive images in SZ indicates valence-incongruent facial expressions.

Conclusion: The patterns of emotional responses differed between the two groups. While both groups were in broad agreement in self-reported arousal and emotion labels, their mean GSR, and fEMG correlates of emotion diverged in relation to the social nature of the stimuli and clinical measures. Importantly, these results suggest disrupted self awareness of internal states in SZ and underscore the complexities of emotion processing in health and disease.

No MeSH data available.


Related in: MedlinePlus

Procedure of the task. In a trial, participants viewed a block of four images for 40 s (10 s per image). Galvanic skin response (GSR) and facial electromyography (fEMG) were continuously recorded during the viewing. Immediately after the block, they rated the valence and the arousal level using the Self-Assessment Mannikin Scale (SAM). Then, they selected from a choice of six words which emotion they felt during viewing of the images.
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Figure 1: Procedure of the task. In a trial, participants viewed a block of four images for 40 s (10 s per image). Galvanic skin response (GSR) and facial electromyography (fEMG) were continuously recorded during the viewing. Immediately after the block, they rated the valence and the arousal level using the Self-Assessment Mannikin Scale (SAM). Then, they selected from a choice of six words which emotion they felt during viewing of the images.

Mentions: Stimuli were presented on a 24” monitor (1024 × 768 resolution) 70–80 cm from the participant with Unity3D software (Unity Technologies, San Francisco, CA, USA). Stimuli were shown in category blocks of four images, at 10 s per image (40 s per block). Immediately after a block, participants were asked to indicate, with a mouse, their valence and arousal ratings using the Self-Assessment Mannikin Scale (SAM; Lang, 1980). The far left SAM indicated very negative or very unarousing and the far right SAM indicated very positive/pleasant or very arousing (see Figure 1). Then, participants selected the emotion they were experiencing out of six choices (happy, angry, afraid, sad, disgusted, neutral). There were six blocks, one for each category (social positive, social negative, social neutral, non-social positive, non-social negative, non-social neutral). A block design was used to maximize the experience of one category type. The order of presentation of blocks was randomized.


Complexities of emotional responses to social and non-social affective stimuli in schizophrenia.

Peterman JS, Bekele E, Bian D, Sarkar N, Park S - Front Psychol (2015)

Procedure of the task. In a trial, participants viewed a block of four images for 40 s (10 s per image). Galvanic skin response (GSR) and facial electromyography (fEMG) were continuously recorded during the viewing. Immediately after the block, they rated the valence and the arousal level using the Self-Assessment Mannikin Scale (SAM). Then, they selected from a choice of six words which emotion they felt during viewing of the images.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4373273&req=5

Figure 1: Procedure of the task. In a trial, participants viewed a block of four images for 40 s (10 s per image). Galvanic skin response (GSR) and facial electromyography (fEMG) were continuously recorded during the viewing. Immediately after the block, they rated the valence and the arousal level using the Self-Assessment Mannikin Scale (SAM). Then, they selected from a choice of six words which emotion they felt during viewing of the images.
Mentions: Stimuli were presented on a 24” monitor (1024 × 768 resolution) 70–80 cm from the participant with Unity3D software (Unity Technologies, San Francisco, CA, USA). Stimuli were shown in category blocks of four images, at 10 s per image (40 s per block). Immediately after a block, participants were asked to indicate, with a mouse, their valence and arousal ratings using the Self-Assessment Mannikin Scale (SAM; Lang, 1980). The far left SAM indicated very negative or very unarousing and the far right SAM indicated very positive/pleasant or very arousing (see Figure 1). Then, participants selected the emotion they were experiencing out of six choices (happy, angry, afraid, sad, disgusted, neutral). There were six blocks, one for each category (social positive, social negative, social neutral, non-social positive, non-social negative, non-social neutral). A block design was used to maximize the experience of one category type. The order of presentation of blocks was randomized.

Bottom Line: The two groups did not differ in their labeling of the emotions evoked by the stimuli, but individuals with SZ were more positive in their valence ratings.Negative symptoms in SZ and disorganized schizotypy in CO were associated with reduced mean fEMG.Importantly, these results suggest disrupted self awareness of internal states in SZ and underscore the complexities of emotion processing in health and disease.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, Vanderbilt University, Nashville TN, USA.

ABSTRACT

Background: Adaptive emotional responses are important in interpersonal relationships. We investigated self-reported emotional experience, physiological reactivity, and micro-facial expressivity in relation to the social nature of stimuli in individuals with schizophrenia (SZ).

Method: Galvanic skin response (GSR) and facial electromyography (fEMG) were recorded in medicated outpatients with SZ and demographically matched healthy controls (CO) while they viewed social and non-social images from the International Affective Pictures System. Participants rated the valence and arousal, and selected a label for experienced emotions. Symptom severity in the SZ and psychometric schizotypy in CO were assessed.

Results: The two groups did not differ in their labeling of the emotions evoked by the stimuli, but individuals with SZ were more positive in their valence ratings. Although self-reported arousal was similar in both groups, mean GSR was greater in SZ, suggesting differential awareness, or calibration of internal states. Both groups reported social images to be more arousing than non-social images but their physiological responses to non-social vs. social images were different. Self-reported arousal to neutral social images was correlated with positive symptoms in SZ. Negative symptoms in SZ and disorganized schizotypy in CO were associated with reduced mean fEMG. Greater corrugator mean fEMG activity for positive images in SZ indicates valence-incongruent facial expressions.

Conclusion: The patterns of emotional responses differed between the two groups. While both groups were in broad agreement in self-reported arousal and emotion labels, their mean GSR, and fEMG correlates of emotion diverged in relation to the social nature of the stimuli and clinical measures. Importantly, these results suggest disrupted self awareness of internal states in SZ and underscore the complexities of emotion processing in health and disease.

No MeSH data available.


Related in: MedlinePlus