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The theory of planned behavior
This article reviews the Theory of Planned Behavior (Ajzen, 1985; Ajzen, 1987). The theory is empirically supported, demonstrating high predictive accuracy of intentions to engage in various behaviors based on attitudes, subjective norms, and perceived behavioral control. These intentions, combined with perceptions of behavioral control, account for a significant portion of the variance in actual behavior. The relationships among attitudes, subjective norms, and perceived behavioral control are linked to specific behavioral, normative, and control beliefs, though the precise nature of these relationships remains uncertain. Expectancy-value formulations partially address these relations, and optimal rescaling of expectancy and value measures is proposed to overcome measurement limitations. Furthermore, incorporating past behavior into the prediction model is suggested as a method to assess the theory’s sufficiency, which remains an unresolved issue. Initial evidence suggests that the theory accurately predicts behavior, subject to limitations in behavioral reliability. [NPID: Planned behavior, behavior, norms, beliefs, predict, behavioral liability]
Year: 1991
