Differential response patterns to disgust-related pictures

Area of Science:

• Cognitive Psychology
• Clinical Psychology
• Neuroscience

Background:

• Obsessive-compulsive disorder (OCD) has various subtypes, including contamination-related OCD (C-OCD).
• Attentional bias is a cognitive mechanism potentially linked to psychological disorders.
• Understanding cognitive predispositions is crucial for C-OCD research.

Purpose of the Study:

• To investigate attentional bias as a predisposing factor for C-OCD.
• To examine how neutral, disgust, and fear stimuli affect attention in individuals with varying C-OC symptoms.
• To explore the role of uncertainty in disgust processing within the context of C-OCD.

Main Methods:

• A visual search task was employed with 50 healthy participants exhibiting subclinical C-OC symptoms.
• Participants identified target images amidst neutral distractors, with stimuli including neutral, disgust, and fear-related pictures.
• Reaction times and confidence levels in identifying emotional stimuli were measured.

Main Results:

• Significant differences in reaction times were observed between emotional and neutral pictures.
• Participants showed higher confidence in identifying fear stimuli compared to disgust stimuli.
• This effect was slightly amplified in individuals with higher C-OC symptoms.

Conclusions:

• Attentional bias, particularly concerning disgust and fear stimuli, may be implicated in C-OCD.
• The findings support the cost-benefit hypothesis, suggesting evolutionary differences in uncertainty associated with disgust versus fear.
• Increased uncertainty in disgust processing could be an underestimated factor in pathological disgust experiences, relevant to C-OCD.