Spousal touch during sleep: better sleep unless you're anxiously attached?

Affiliative touch, such as physical affection between relationship partners, activates neural systems associated with reward, relaxation, and attachment. Co-sleeping is a common practice among romantic partners, and the social context of sleep is linked to well-being. The effect of touch during sleep, however, remains largely untested. As a first study, 210 married couples were asked how much they generally touched during sleep and how important it was for them to touch during sleep. I hypothesized that perceptions of more spousal touch during sleep, as well as greater importance placed on that touch, would be associated with better quality of sleep. Given the strong links between touch and attachment, and previous findings of poor sleep associated with attachment anxiety, these effects were expected to be greatest among spouses higher in attachment anxiety (who might benefit most from a sense of security arising from touch). Separate regression analyses were run for husbands and wives, controlling for affective symptoms of depression (which were significant predictors of poor sleep for both spouses). For both spouses, higher reports of amount and importance of touch during sleep predicted better quality of sleep. For wives, the predicted interaction was significant, but in the opposite direction: Reported amount and importance of spousal touch during sleep was positively related to sleep quality only among those with lower attachment anxiety, whereas it was unrelated among those with higher attachment anxiety. Higher attachment anxiety also was related to worse sleep among wives, but not husbands. It may be the case that wives who are lowest in attachment anxiety may feel more comfortable when being touched by their partners. As a result, they may touch more often, place more importance on touch, and be more likely to experience rewards of touch such as better sleep quality. The findings lend support to the idea that social touch can serve a regulatory function, even during sleep.