Investigators frequently rely on the theory of planned behavior (TPB) as a conceptual framework to explain and predict human behavior in a variety of behavioral domains. Much of this research has focused on predicting behavioral intentions from attitudes, subjective norms and perceived behavioral control, typically by examining the additive effects of these constructs. However, in the original formulation of the TPB, perceived behavioral control was postulated to moderate the influence of attitude and subjective norm on intention. This tenet of the TPB has been drawing increasing attention in recent years. In a preregistered program of research conducted in two European countries (Germany and UK) concerning two different behaviors (exercising and reducing energy consumption), we found empirical support for the postulated moderating effects. The results suggest that as scores on perceived behavioral control increase, the strength of the association between attitude and intention increases as well, whereas the strength of the association between subjective norm and intention decreases. Implications of these findings for theory and future research are discussed.

中文翻译：

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预知行为控制在计划行为理论中的调节作用：一项预先注册的研究

研究人员经常依赖计划行为理论（TPB）作为概念框架来解释和预测各种行为领域中的人类行为。这项研究大部分集中在通过态度，主观规范和感知的行为控制来预测行为意图，通常是通过检查这些构造的累加效应来进行的。但是，在城规会的原始表述中，假定感知的行为控制可以减轻态度和主观规范对意图的影响。近年来，城规会的这一宗旨日益引起人们的关注。在两个欧洲国家（德国和英国）进行的有关两种不同行为（锻炼和减少能源消耗）的预先注册的研究计划中，我们发现了假设的调节效应的经验支持。结果表明，随着感知行为控制得分的增加，态度和意图之间的联系强度也随之增加，而主观规范和意图之间的联系强度则下降。讨论了这些发现对理论和未来研究的意义。