The key finding links self-prioritization to a decision rule: when a default, self-centered response makes sense, people favor items they own before the stimulus even appears. That bias grew stronger when decisions were harder, which suggests the effect is not only about seeing differently but about leaning on a simple rule when the brain must decide under pressure. Computational fits point to a prestimulus tilt toward self-related responses rather than a change in early sensory encoding.
Why this matters for human potential and inclusion is practical. If people habitually privilege what they own when choices are unclear, that can shape learning, teamwork, and access to resources in subtle ways. Understanding the mechanics of ownership bias opens pathways to design environments and policies that reduce unfair advantages or harness self-relevance to boost motivation and engagement. Follow the link to see how these experiments and models map the decision process and what that implies for everyday settings where ownership and fairness collide.
Abstract
Personal possession exerts a significant influence on decision-making, such that stimulus classification is speeded when objects belong to the self (vs. other persons). Exactly when and how this self-prioritization effect arises, however, remains a matter of speculation and debate. Accordingly, adopting a psychophysical approach in combination with computational modeling, here we hypothesized that self-prioritization could derive from the application of an egocentric strategy (i.e., default-to-self response) during decisional processing. Using a modified object-classification task in which participants judged blended images comprising varying amounts of self-owned and friend-owned objects (i.e., pencils and pens), the results of two experiments supported this viewpoint. Participants perceptually prioritized their possessions only when a self-centric decisional strategy was applicable (Experiment 1), an effect that was amplified when the demands of decision-making increased (Experiment 2). Additional computational analyses traced the origin of self-prioritization to a prestimulus preference for self-related responses, a strategic component of decision-making. Collectively, these findings inform understanding of how ownership influences decisional processing, with wider implications for theoretical accounts of self-bias.
