Stern R A, Prochaska J O, Velicer W F, Elder J P
University of Rhode Island, Kingston 02881.
Addict Behav. 1987;12(4):319-29. doi: 10.1016/0306-4603(87)90046-3.
A stage model of adolescent cigarette smoking acquisition was developed and an instrument to measure the stages was created. Internal validity was obtained based on principal component analysis, item analysis, and coefficient alpha. Three distinct components were labeled precontemplation, decision-making, and maintenance. The scales had reliability coefficients ranging from .86 to .94. External validity was obtained by relating the scale scores to measures of smoking behavior and intent to smoke. A cluster analysis resulted in nine distinct clusters, including profiles representing precontemplation, contemplation, decision-making, action, and maintenance stages. Further validity was obtained for the clusters by comparing groups on the perceived positive and negative consequences of smoking, and the derived pleasure from smoking.
开发了一个青少年吸烟习得的阶段模型，并创建了一个用于测量这些阶段的工具。基于主成分分析、项目分析和阿尔法系数获得了内部效度。三个不同的成分被标记为前意向、决策和维持。这些量表的信度系数在0.86至0.94之间。通过将量表分数与吸烟行为和吸烟意图的测量结果相关联获得了外部效度。聚类分析产生了九个不同的聚类，包括代表前意向、意向、决策、行动和维持阶段的概况。通过比较不同组在吸烟的感知积极和消极后果以及吸烟产生的愉悦感方面的差异，获得了这些聚类的进一步效度。
