Heightened Distraction under Competition in Obsessive-Compulsive Disorder

Area of Science:

• Neuroscience
• Cognitive Psychology
• Psychopathology

Background:

• Objective measures of mental health are crucial for transdiagnostic psychopathology frameworks.
• Altered visual processing is a potential indicator of psychopathology.
• Affective distractors can impact attentional resources.

Purpose of the Study:

• To quantify the visuocortical impact of affective distractors on attentional resources in obsessive-compulsive disorder (OCD).
• To compare attentional resource allocation in individuals with OCD versus controls under varying distraction conditions.

Main Methods:

• Used steady-state visual evoked potentials (ssVEPs) to measure visuocortical engagement.
• Employed a foreground task (coherent motion detection) overlaid with distractor images (pleasant, neutral, unpleasant, OCD-evoking).
• Applied the distraction under competition (DUC) model to analyze attention selection.

Main Results:

• The OCD group exhibited stronger visuocortical competition, indicating reduced task engagement, especially with unpleasant and OCD-evoking pictures.
• The DUC model effectively captured attentional dynamics in both groups.
• Unpleasant and OCD-evoking stimuli significantly competed for attentional resources in the OCD group.

Conclusions:

• Individuals with OCD demonstrate significant visuocortical competition and impaired attentional resource allocation when exposed to affective and disorder-relevant distractors.
• These findings highlight the role of visual processing alterations in OCD.
• The DUC model provides a valuable framework for understanding attentional deficits in psychopathology.