Journal
AFFECTIVE SCIENCE
Volume 3, Issue 2, Pages 341-352Publisher
SPRINGERNATURE
DOI: 10.1007/s42761-021-00076-4
Keywords
Positive affect; Close relationships; Cortisol; Emotions; Couple conflict
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Sleep deprivation has a causal negative impact on couples' conflicts, as indicated by higher cortisol levels during conflict and decreased positive affect before and after conflict.
Although poor sleep has been found to correlate with deteriorations in romantic relationships, its causal impact on interpersonal conflict has not previously been studied. Therefore, 30 couples were randomly assigned to either a single night of total sleep deprivation or a night of normal sleep to test the effects of sleep deprivation on couples' conflict. After the experimental night, all participants discussed a topic of recurrent conflict for 15 min. We collected pre- and post-conflict measures of cortisol, self-reports of feelings, and satisfaction with the conflictual discussion. Multilevel analyses revealed higher cortisol levels during conflict and less positive affect prior to and after the conflict for sleep-deprived couples compared to couples in the control condition. These findings provide initial evidence for a causal negative impact of sleep deprivation on couples' conflicts.
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