a Annenberg School for Communication , University of Pennsylvania , Philadelphia , PA , USA.
d Department of Communication , Mississippi State University , Starkville , MS , USA.
Psychol Health. 2018 May;33(5):682-700. doi: 10.1080/08870446.2017.1387261. Epub 2017 Oct 26.
This study examines the effects of a mammography decision intervention on perceived susceptibility to breast cancer (PSBC) and emotion and investigates how these outcomes predict mammography intentions.
Randomised between-subjects online experiment. Participants were stratified into two levels of risk. Within each stratum, conditions included a basic information condition and six decision intervention conditions that included personalised risk estimates and varied according to a 2 (amount of information: brief vs. extended) × 3 (format: expository vs. untailored exemplar vs. tailored exemplar) design. Participants included 2465 US women ages 35-49.
PSBC as a percentage, PSBC as a frequency, worry, fear and mammography intentions.
The intervention resulted in significant reductions in PSBC as a percentage for women in both strata and significant increases in worry and fear for women in the upper risk stratum. Of the possible mediators examined, only PSBC as a percentage was a consistent mediator of the effect of the intervention on mammography intentions.
The results provide insight into the mechanism of action of the intervention by showing that PSBC mediated the effects of the intervention on mammography intentions.
本研究考察了乳腺 X 线摄影决策干预对乳腺癌感知易感性（PSBC）和情绪的影响，并探讨了这些结果如何预测乳腺 X 线摄影意向。
随机分组的在线实验。参与者分为两个风险水平。在每个层次内，条件包括基本信息条件和六个决策干预条件，这些条件包括个性化风险估计，并根据 2（信息量：简要与扩展）×3（格式：说明与非定制范例与定制范例）设计而有所不同。参与者包括 2465 名年龄在 35-49 岁的美国女性。
PSBC 百分比、PSBC 频率、担忧、恐惧和乳腺 X 线摄影意向。
该干预措施导致两个层次中 PSBC 百分比显著降低，且高危组女性的担忧和恐惧显著增加。在所检查的可能中介因素中，只有 PSBC 百分比是干预对乳腺 X 线摄影意向影响的一致中介因素。
这些结果通过显示 PSBC 中介了干预对乳腺 X 线摄影意向的影响，为干预的作用机制提供了深入了解。
