<p>Results of the Between and Within-Person Models.</p>

Although the model assumes moment-to-moment within-person variability, most research evidence stems from cross-sectional study designs. Therefore, this study applies Ecological Momentary Assessment (EMA) to test the dynamic interplay between primary and secondary appraisals and fluctuations in perceived stress.

We used EMA data from the TrackYourStress platform to examine both interindividual (“who”) and intraindividual (“when”) associations between primary and secondary appraisals and perceived stress. Bayesian multilevel models were applied to 2,908 observations from 164 participants. These models showed that higher appraisal of situational relevance was associated with increased stress, whereas higher appraisal of coping resources was associated with lower stress levels.