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Research suggests that relationship satisfaction changes in systematic ways over the course of a relationship. In this preregistered study, we tested whether relationship satisfaction changes differently as a function of the eventual outcome of the relationship, that is, whether the relationship lasted, whether it was dissolved, and whether people began a new relationship after separation. Data came from a large longitudinal study (the Longitudinal Study of Generations), including 2,268 participants aged 16–90 years, who were assessed at up to seven waves across 20 years. We used multilevel models to examine change in relationship satisfaction within relationships (i.e., comparing continuing and dissolving relationships) and across relationships (i.e., comparing consecutive relationships of the same persons). The results indicated that satisfaction in dissolving (vs. continuing) relationships was lower and showed a more pronounced decrease over the course of the relationship. Individuals who began a new relationship after separation were more satisfied at the beginning of the new relationship compared to the beginning of the previous relationship. However, satisfaction declined within both relationships (i.e., the previous and the new relationship). Moderator analyses indicated that relationship satisfaction decreased more strongly when participants had children, were in a dissolving relationship of briefer duration, and when the time lag between the previous and current relationship had been shorter. Overall, the findings contribute to understanding change in satisfaction within and across relationships. The Discussion addresses the possibility that couples tend to separate when relationship satisfaction falls below a critical value. (PsycInfo Database Record (c) 2024 APA, all rights reserved)
