The main analyses assessed independent associations between threat appraisals, challenge
appraisals, exercise behavior, and day as well as two-way interactions between all of these
variables with positive affect as the dependent variables. The second model was run with negative
affect as the dependent variable. As shown in Table 2, significant and negative associations were
observed between positive affect and the day of data collection. Additionally, the interaction
between day and appraisals of challenge was significantly associated with positive affect,
suggesting that the challenge/positive affect relationship was moderated by the day of datacollection. Based on the results of the unconditional growth curve model described above, we
chose days 1, 7, and 14 as meaningful values of the day variable (i.e., the moderator) to analyze
the simple slopes relating challenge appraisal to positive affect. Results revealed that: (a) the
challenge/positive affect relationship was significant and positive on day 7 [o ¼ :77, tð54Þ ¼ 4:16,
po:001] and day 14 [o ¼ 1:22, tð54Þ ¼ 4:32, po:001] and (b) the challenge simple slope was
significant only on days 4 through 14 of data collection. Taken together, these findings indicate
that the relationship between challenge appraisal and increased positive affect emerged primarily
during the last week of data collection, a period of increasingly frequent academic exams
The main analyses assessed independent associations between threat appraisals, challengeappraisals, exercise behavior, and day as well as two-way interactions between all of thesevariables with positive affect as the dependent variables. The second model was run with negativeaffect as the dependent variable. As shown in Table 2, significant and negative associations wereobserved between positive affect and the day of data collection. Additionally, the interactionbetween day and appraisals of challenge was significantly associated with positive affect,suggesting that the challenge/positive affect relationship was moderated by the day of datacollection. Based on the results of the unconditional growth curve model described above, wechose days 1, 7, and 14 as meaningful values of the day variable (i.e., the moderator) to analyzethe simple slopes relating challenge appraisal to positive affect. Results revealed that: (a) thechallenge/positive affect relationship was significant and positive on day 7 [o ¼ :77, tð54Þ ¼ 4:16,po:001] and day 14 [o ¼ 1:22, tð54Þ ¼ 4:32, po:001] and (b) the challenge simple slope wassignificant only on days 4 through 14 of data collection. Taken together, these findings indicatethat the relationship between challenge appraisal and increased positive affect emerged primarilyduring the last week of data collection, a period of increasingly frequent academic exams
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