Object attachment and decision-making.

Area of Science:

• Neuroscience
• Behavioral Economics
• Psychology

Background:

• Possessions gain value beyond utility, driven by emotional attachments and conceptual meanings.
• Research on the endowment effect and hoarding disorder (HD) often emphasizes fear of loss.
• Emerging evidence highlights positive appraisals and attachments, involving the brain's reward system, in value perception.

Purpose of the Study:

• To explore the dual role of negative (fear of loss) and positive (attachment) factors in the perceived value of possessions.
• To investigate the neural underpinnings of these valuation processes.
• To examine the continuity of these mechanisms across typical and clinical populations and in relation to other species.

Main Methods:

• Review of existing behavioral and neural evidence from endowment effect and hoarding disorder research.
• Analysis of brain activation patterns (insula, anterior cingulate cortex, nucleus accumbens, orbitofrontal cortex).
• Comparison with animal behaviors (food storing, offspring care) and human reward-related decisions.

Main Results:

• Struggling to relinquish possessions is associated with negative emotions and activation in brain regions like the insula.
• Positive appraisals, motivations, and attachments are linked to activation in the dopaminergic mesolimbocortical system.
• Valuation processes show continuity between typical/clinical humans and other species, suggesting ancient neural system involvement.

Conclusions:

• The perceived value of possessions is influenced by both fear of loss and positive attachments, engaging distinct but interconnected neural systems.
• Attachment to and protection of goods may reflect ancient neural systems, potentially related to offspring care.
• Further research is needed across diverse demographics and with varied task framing to fully understand these complex valuation processes.