The joint memory effect: challenging the selfish stigma in Huntington's disease?

Area of Science:

• Neuroscience
• Social Psychology
• Genetics

Background:

• Huntington's disease (HD) is often associated with the belief of selfish behavior and disregard for others.
• Patient advocacy groups and clinical experts question this prevalent notion.
• Investigating social cognition in early-stage HD is crucial to understand their social interactions.

Purpose of the Study:

• To investigate whether individuals with Huntington's disease (HD) can attend to others.
• To examine social cognition and memory in early-stage HD patients during a joint memory task.
• To challenge the assumption of inherent selfishness in HD.

Main Methods:

• A joint memory task was conducted with 69 early-stage HD patients and 56 healthy controls.
• Participants completed a semantic categorization task alone or with a partner (examiner).
• A surprise free recall task assessed memory for assigned, partner's assigned, and unassigned (socially irrelevant) words.

Main Results:

• Both groups exhibited self-prioritization, recalling their assigned words better than others'.
• A joint memory effect was observed: socially relevant words (assigned to self or partner) were recalled better than irrelevant words.
• Recall performance correlated with cognitive function; the joint memory effect correlated with right orbitofrontal grey matter density in HD patients.

Conclusions:

• Findings challenge the notion that HD patients are inherently selfish or disinterested in others.
• Individuals with HD demonstrate the capacity to process information about their partners.
• Social difficulties in HD may stem from factors beyond social cognition deficits, warranting further ecological assessments.