I learned about rejection sensitivity in 2012. It seems a useful and under-appreciated concept. Here are notes collected from my brief look into it.
Rejection-sensitive men were reported by their partners to show more jealousy (r = .22, p < .05). Rejection-sensitive women were reported by their partners to be more hostile (r = .26, p < .05) and more emotionally unsupportive (r = .3 l, p < .05 ). For women, the correlation between rejection sensitivity and jealousy was nonsignificant. For men, the correlations between rejection sensitivity and both hostility and emotional support were nonsignificant. None of these results changed appreciably when we recomputed the correlations while controlling for the partners' own levels of rejection sensitivity.
They're studying the effect of rejection sensitivity on relationship satisfaction, so they do regressions to separate the effects of the behaviors (jealousy, hostility, unsupportiveness) from the rejection sensitivity itself. They find that "jealous behavior accounts for 29% of the effect of men's rejection sensitivity on their female partners' relationship dissatisfaction" and "hostility and lack of support account for 41% of the effect of women's rejection sensitivity on their male partners' relationship dissatisfaction".
I'm somewhat distrustful of taking strong conclusions from single studies like these.
Following the presentation of experimentally manipulated ambiguous rejection feedback after interaction with a confederate, high rejection-sensitive
people reported greater feelings of rejection than low rejection-sensitive people. This effect was limited to feelings of rejection, rather than reflecting greater emotional distress in general, and was behaviorally manifest to the experimenter....
Qualitative data from the debriefings further support this conclusion. Rejection-sensitiv
epeople were likely to ruminate over what they had done to cause the confederate to reject them; for example, some of their comments were "I felt so badly. I wondered what I had done wrong" and "I was worried that I had bored him?' People who were low in rejection sensitivity were not concerned with understanding why the confederate did not return. They were also less likely to perceive the confederate's behavior as a rejection, attributing it instead to nonpersonal causes, as in the comment "I thought maybe she was in a rush."