Mothers and Fathers Perform More Mate Retention Behaviors than Individuals without Children.

Human life history is unique among primates, most notably the extraordinary length of infant dependency and the formation of long-term pair-bonds. Men and women are motivated to remain pair-bonded to maintain the distribution of male-provisioned resources to a woman and her offspring, or to protect offspring from infanticide. Men and women can employ several strategies to retain their mate and prevent their partner from defecting from the relationship, including individual mate retention (behaviors performed alone) and coalitional mate retention (behaviors performed by a close ally).

Risk of death or life-threatening injury for women with children not sired by the abuser.

Women who are abused by their male intimate partners incur many costs, ranging in severity from fleeting physical pain to death. Previous research has linked the presence of children sired by a woman's previous partner to increased risk of woman abuse and to increased risk of femicide. The current research extends this work by securing data from samples of 111 unabused women, 111 less severely abused women, 128 more severely abused women, and 26 victims of intimate partner femicide from the Chicago Women's Health Risk Study to document an ordinal trend in the risk of experiencing more severe forms of violence for women who have children in the household sired by a previous partner.

Romantic jealousy in early adulthood and in later life.

Young men are more distressed by a partner's sexual infidelity, whereas young women are more distressed by a partner's emotional infidelity. The present research investigated (a) whether the sex difference in jealousy replicates in an older sample, and (b) whether younger people differ from older people in their selection of the more distressing infidelity scenario. We presented forced-choice dilemmas to 202 older people (mean age = 67 years) and to 234 younger people (mean age = 20 years).

Methods of filicide: stepparents and genetic parents kill differently.

Stepparents commit filicide at higher rates than do genetic parents. According to M. Daly and M.

Sex differences in sexual psychology produce sex-similar preferences for a short-term mate.

We explored aspects of men's and women's short-term sexual psychology as a function of a potential short-term partner's relationship status. A total of 209 men and 288 women reported how likely they would be to pursue a casual sexual relationship with an attractive member of the opposite sex who was (1) married, (2) not married but has casual sexual partners, or (3) not married and has no casual sexual partners. Guided by sperm competition theory, we predicted and found that men prefer short-term sex partners who are not already involved in relationships and hence present a relatively low risk of sperm competition.