School of Social Work, University of Washington, Seattle, WA 98105-6299, USA.
Psychol Health. 2010 Jun;25(5):569-87. doi: 10.1080/08870440902777554.
The current study examines the Theory of Planned Behaviour's (TPB) ability to predict marijuana use among young women who experienced a premarital pregnancy before the age of 18 years, using longitudinal data. The validity of the TPB assumption that all other variables work through TPB constructs is also tested. Indicators of four constructs that have been shown in the literature to be predictive of marijuana use-persistent environmental adversity, emotional distress, adolescent marijuana use and drug use in the social network-were tested as predictors of attitudes, norms and self-efficacy, in a structural equation modelling framework. All paths from distal predictors were through the mediating TPB constructs, in accordance with the tenets of the model. Implications of these findings for the TPB model and for understanding factors that lead to marijuana use are discussed.
本研究使用纵向数据检验了计划行为理论（TPB）在预测 18 岁以下经历过婚前怀孕的年轻女性的大麻使用方面的能力，同时也检验了 TPB 假设的有效性，即所有其他变量都是通过 TPB 结构起作用的。文献中表明与大麻使用相关的四个结构的指标——持续的环境逆境、情绪困扰、青少年大麻使用和社交网络中的药物使用——被测试为态度、规范和自我效能的预测因子，这是在结构方程建模框架中进行的。根据该模型的原则，所有来自远端预测因子的路径都是通过中介 TPB 结构的。讨论了这些发现对 TPB 模型以及理解导致大麻使用的因素的意义。
