Judgmental perception of co-speech gestures in MDD

Area of Science:

• Neuroscience
• Psychology
• Social Cognition

Background:

• Cognitive biases in depression can alter social perception.
• Nonverbal communication, including gestures, is vital for social interaction.
• Gender differences exist in perceiving nonverbal cues, but depression's impact is understudied.

Purpose of the Study:

• To investigate how cognitive bias influences the perception of appraisal in nonverbal communication among individuals with major depressive disorder (MDD).
• To examine the role of gender and context (speech, speaker type) in this perception.

Main Methods:

• 22 patients with MDD and 22 healthy controls watched videos of speakers and indicated perceived appraisal.
• Inter-subject covariance (ISC) measured response consistency across groups.
• Stimuli varied in speech presence and speaker realism (natural vs. stick-figure).

Main Results:

• Significant effects of diagnosis, gender, and their interaction on appraisal perception were found (p < .001).
• Female healthy controls showed higher consistency than other groups.
• Higher depression severity correlated with lower response consistency (negative correlation).
• Natural speaker videos without speech elicited the most consistent responses, driven by co-speech gestures.

Conclusions:

• Cognitive bias in MDD disrupts the perception of appraisal in nonverbal communication, particularly in females.
• Gesture perception consistency is linked to depression severity.
• Understanding gestural communication perception is crucial for mental health rehabilitation.