Validity of stage assessment in the adoption and maintenance of physical activity and fruit and vegetable consumption.
Validity of stage assessment in the adoption and maintenance of physical activity and fruit and vegetable consumption.
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DOI：
10.1037/a0012983
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发表时间：
2009-03
影响因子：
4.2
通讯作者：
Velicer, Wayne F.
中科院分区：
文献类型：
--
作者：
Lippke, Sonia;Ziegelmann, Jochen P.;Schwarzer, Ralf;Velicer, Wayne F.
阶段评估进行检查，以开发和测试可用于分类个人的精细测量。对1,850人的身体活动和饮食行为进行了阶段评估。两种行为的阶段与行为和其他测试变量进行比较。计算了误分类、敏感性、特异性、受试者操作曲线和不连续模式。不连续性模式进行了测试，跨阶段的趋势和相邻阶段之间的计划对比。与以前的研究相比，敏感性（70%至80%）和特异性（80%至87%）都很高。当使用较低水平的标准（如强度较低的活动）时，灵敏度较低，而特异性较高。当行为维持评估，结果表明，行动和维护之间的时间截止点是同样最佳的在不同的截止点。应用对比分析，跨阶段的非线性趋势和87%的阶段差异预测的匹配结果。一般支持阶段假设，特别是改进的阶段评估。心理变量的水平（例如，容易、习惯）可以区分阶段以及或甚至比时间阶段定义更好。
Stage assessments are examined to develop and test refined measurements that can be used for classifying individuals. Stages were assessed in 1,850 persons in terms of their physical activity and dietary behaviors. Stages for both behaviors were compared to behavior and other test variables. Misclassification, sensitivity, specificity, receiver-operation-curves, and discontinuity patterns were computed. Discontinuity patterns were tested with trends across stages and planned contrasts between adjacent stages. In comparison to previous studies, sensitivity (70% to 80%) and specificity (80% to 87%) were high. When using lower level criteria (such as less intensive activity), sensitivity was lower, whereas specificity was higher. When behavioral maintenance was assessed, results suggested that the temporal cut-off point between action and maintenance was equally optimal at different cut-off points. Applying contrast analyses, nonlinear trends across the stages and a match of 87% of predictions of stage differences resulted. Stage assumptions are supported in general, and refined stage assessment in particular. Levels of psychological variables (e.g., easiness, habit) may discriminate stages as well as or even better than temporal stage definitions.
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影响因子：
4.2
作者：
MARCUS, BH;ROSSI, JS;ABRAMS, DB
通讯作者：
ABRAMS, DB
影响因子：
2.4
作者：
Lippke, S;Ziegelmann, JP;Schwarzer, R
通讯作者：
Schwarzer, R
影响因子：
4.2
作者：
Velicer, Wayne F.;Redding, Colleen A.;Prochaska, James O.
通讯作者：
Prochaska, James O.
影响因子：
5.1
作者：
Rakowski, W;Ehrich, B;Woolverton, H
通讯作者：
Woolverton, H
影响因子：
5.4
作者：
Rademacher, Jens D. M.;Lippke, Sonta
通讯作者：
Lippke, Sonta