Modeling Individual Differences in Within-Person Variation of Negative and Positive Affect in a Mixed Effects Location Scale Model Using BUGS/JAGS
Modeling Individual Differences in Within-Person Variation of Negative and Positive Affect in a Mixed Effects Location Scale Model Using BUGS/JAGS
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DOI：
10.1080/00273171.2012.658328
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发表时间：
2012-01-01
影响因子：
3.8
通讯作者：
Sparks, Catharine
中科院分区：
文献类型：
--
作者：
Rast, Philippe;Hofer, Scott M.;Sparks, Catharine
使用混合效应位置量表模型对测量突发设计中7天内（N = 178）的负面和正面影响的人内变异性的个体差异进行建模和解释。这些数据来自大学本科生，并来自一项连续两年重复的研究。水平和情绪变化的个体差异采用随机截距和随机斜率进行建模，其中允许参与者之间的剩余人内变异性不同。此外，人内变异性的变化被解释为包括一个随时间变化的预测指标，表明日常压力的严重程度。该模型考虑了2个位置和2个规模效应，并提供了证据表明，在日常压力源中报告严重程度较高的个体也表现出较大的影响变异性，但仅适用于表现出较低的整体影响变异性和报告平均负面影响的参与者。总体而言，那些在情感报告中变化更大的人对日常压力源的反应更少，因为他们的情感变化水平仍然很高。我们描述了这个模型的效用，为进一步研究个体的变异和变化。
A mixed effects location scale model was used to model and explain individual differences in within-person variability of negative and positive affect across 7 days (N = 178) within a measurement burst design. The data come from undergraduate university students and are pooled from a study that was repeated at two consecutive years. Individual differences in level and change in mood was modeled with a random intercept and random slope where the residual within-person variability was allowed to vary across participants. Additionally changes in within-person variability were explained by the inclusion of a time-varying predictor indicating the severity of daily stressors. This model accounted for 2 location and 2 scale effects and provided evidence that individuals who reported higher severity in daily stressors also exhibited greater variability in affect-but only for participants who showed low overall affect variability and who reported low average negative affect. Those who were more variable in their affect reports overall were less reactive to daily stressors in the sense that their high levels of affect variability remained high. We describe the utility of this model for further research on individual variation and change.