Abstract
In evolutionary psychology, jealousy is explained as a result of selection pressures maximizing our reproductive capacity. Previous studies have shown gender differences in the perception of jealousy; men generally demonstrate higher response to sexual infidelity (SI), whereas women to emotional infidelity (EI).
Studies on jealousy between homosexual partners showed, that gay men tend to be more sensitive to EI, whereas lesbians expressed more concerns regarding SI. These studies suggest that the type of jealousy might depend on the sex of respondent's partner.
The aim of this study was to explore the experience of jealousy in heterosexuals and homosexuals using an online survey, and to examine whether sexual/emotional jealousy differs depending on a respondent's partner's sex.