School of Psychology, Trinity College Dublin, Dublin 2, Ireland.
Health Educ Res. 2010 Oct;25(5):769-79. doi: 10.1093/her/cyq031. Epub 2010 May 3.
Previous research using the Theory of Planned Behaviour (TPB) for predicting skin cancer-related health behaviours has not adequately incorporated empirical advances in the conceptualization of the perceived behavioural control (PBC) component of the theory. This study examined the role of self-efficacy and controllability for predicting sunscreen and sunbed use intentions. Five hundred and ninety young adults completed a questionnaire on beliefs and intentions regarding sunscreen and sunbed use. Analysis using confirmatory factor analysis and multiple regression supported a conceptual distinction between two PBC subcomponents: controllability and self-efficacy. While self-efficacy--but not controllability--emerged as a significant predictor of intentions to use sunscreen, the opposite pattern was observed for the prediction of intentions to use sunbeds, whereby lower controllability beliefs were associated with higher intentions. Campaigns aimed at influencing health behaviours should consider the differential effects of the components of perceived control.
先前使用计划行为理论（TPB）预测与皮肤癌相关的健康行为的研究，并未充分纳入该理论中感知行为控制（PBC）成分概念化方面的实证进展。本研究考察了自我效能感和可控性在预测防晒霜和日光浴床使用意图方面的作用。590 名年轻成年人完成了一份关于防晒霜和日光浴床使用信念和意图的问卷。使用验证性因素分析和多元回归的分析结果支持了两个 PBC 子成分（可控性和自我效能感）之间的概念区分。虽然自我效能感——而非可控性——成为使用防晒霜意图的重要预测因素，但在预测使用日光浴床的意图时，却出现了相反的模式，即较低的可控性信念与较高的意图相关。旨在影响健康行为的活动应考虑到感知控制成分的不同影响。
