Neuropsychological impairment associated with compulsive hoarding

Area of Science:

• Cognitive Psychology
• Clinical Psychology
• Neuroscience

Background:

• Compulsive hoarding is a complex condition characterized by excessive acquisition of items and difficulty discarding them.
• Information-processing deficits in memory, attention, and decision-making are hypothesized to underlie hoarding.
• Understanding these cognitive features is crucial for developing effective interventions.

Purpose of the Study:

• To compare information-processing features in patients with compulsive hoarding versus clinical and nonclinical groups.
• To investigate the relationship between specific cognitive deficits and hoarding symptom severity.
• To examine the role of reaction time, impulsivity, and attention in compulsive hoarding.

Main Methods:

• A laboratory-based study comparing three groups: compulsive hoarding (n=30), mixed clinical (n=30), and nonclinical (n=30).
• Assessment of memory, attention, and decision-making using standardized tests.
• Multiple regression analyses to determine the relationship between cognitive variables and hoarding symptoms, controlling for depression and schizotypy.

Main Results:

• Patients with compulsive hoarding exhibited slower and more variable reaction times, increased impulsivity, and poorer performance on tasks assessing target discrimination and spatial attention compared to control groups.
• Slower reaction time and increased impulsivity were significantly associated with hoarding symptoms, independent of depression, schizotypy, and other obsessive-compulsive disorder symptoms.
• No significant group differences were found in emotion-based decision-making tasks.

Conclusions:

• Information-processing deficits, particularly in executive functions like reaction time and impulsivity, are central to the cognitive profile of compulsive hoarding.
• These findings support cognitive models of compulsive hoarding and suggest potential targets for therapeutic interventions.
• Deficits in emotion-based decision-making do not appear to be a primary feature differentiating compulsive hoarding from other clinical conditions.