The evolutionary origins of mental accounting and their influence on account operation processes

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Published 2026 in Advances in Psychological Science

ABSTRACT

: The theory of mental accounting posits that individuals create separate mental accounts for different decision-making tasks, each budgeted independently with non-fungible funds. This separate accounting management method reduces the efficiency of resource allocation, and it is thus considered a deviation from economic rationality. Despite being recognized as a cognitive bias or anomaly, mental accounting remains a persistent feature of human behavior. A fundamental question remains unanswered: if mental accounting is inherently inefficient, why has it been widely preserved through evolution? Drawing on evolutionary psychology, this research proposes that mental accounting is an adaptive mechanism shaped by ancestral environments to fulfill fundamental evolutionary goals, namely survival, reproduction, and hedonic well-being. These goals structure both the classification and management of mental accounts. Specifically, they shape the typical categorizations of accounts, while their relative importance and activation levels determine the rigidity of account governance, as evidenced by preferences in resource allocation, reinforcement of resource inputs, and resistance to cross-account transfers. By testing the evolutionary origins hypothesis, this research aims to determine whether mental accounting, despite its apparent inefficiency in modern contexts, embodies a form of ecological rationality with adaptive value. The findings may offer a deeper understanding of the evolutionary functions underlying this seemingly irrational behavior.

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