Review Article

The Fragility of Choice: A Critical Review of Decision Fatigue and the Choice Strain Model

Abstract

The assumption that human choice is a robust, inexhaustible resource underpins much of modern psychological and economic theory. This review challenges that assumption by synthesizing theoretical and empirical literature on decision fatigue and ego depletion. The review also traces the historical development of the strength model of self-control, examine the cognitive and affective mechanisms proposed to underlie decision fatigue, and critically evaluate recent challenges to the depletion effect, including replication failures and alternative theoretical accounts. It is argued that the fragility of choice is not merely a laboratory curiosity but a phenomenon with profound implications for clinical psychology, organizational behavior, and public policy. The review concludes with an integrative framework suggesting that decision fatigue arises from the interaction of cognitive load, motivational shifts, and perceived cost of deciding, rather than from a limited biological resource. After examining each of these mechanisms in depth, the paper proposes the Choice Strain Model (CSM) as a replacement for resource-based accounts. The paper then discusses applied implications across multiple domains and offer specific future directions. Forty-seven references are synthesized to provide a comprehensive conceptual map for future research.