Diurnal Rhythms in Co-Sleeping Couples: Does Being "In Sync" Matter?
AuthorHasler, Brant P.
AdvisorBootzin, Richard R.
Committee ChairBootzin, Richard R.
MetadataShow full item record
PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
AbstractSubjective feeling, or mood, is not just a product of situational and dispositional factors, but is also based in part on underlying circadian rhythms. Notably, accumulating evidence suggests that circadian patterning is limited to positive affect, possibly as an adaptive manifestation of an appetitive motivational system. Furthermore, dispositional factors may influence the observed patterning, such as blunting the rhythm in positive affect when depression is present. The present study sought to examine further these phenomenon at an individual-level, as well as to explore circadian and affective interactions at a couple-level for perhaps the first time by monitoring mood, interpersonal interactions, sleep, activity, and light in 31 bed-sharing cohabitating couples over the course of 7 days. Participants' depression, well-being, relationship satisfaction, and morningness-eveningness were also assessed. Systematic daily patterning was found in all three measures of affect, and was moderated by depression, well-being, and morningness-eveningness. Within-couple affective synchrony (covariation) was positively associated with relationship satisfaction, within-couple morningness-eveningness similarity, and synchrony of sleep timing. Finally, day-to-day within-couple sleep timing synchrony predicted the tenor of the following day's partner interactions and affect. These data provide further evidence of potentially important interactions between sleep, circadian, affective processes both within- and between-individuals.