This textbook provides a complete overview of motivation and emotion, using an
overarching organizational scheme of how biological, psychological, and environmental …

Where did we come from? What is our connection with other life forms? What are the
mechanisms of mind that define what it means to be a human being? Evolutionary …

In reply to commentary on our target article, we supply further evidence and hypotheses in
the description of ritualized behaviors in humans. Reactions to indirect fitness threats …

Sažetak Sexual jealousy is a basic emotion. Although it lacks a distinctive facial expression
and is unlikely to solve problems of survival, it evolved because it solves adaptive problems …

From 54 articles, 172 effect sizes were meta-analyzed to determine whether men and
women are differentially distressed by emotional versus sexual infidelity. Predictions were …

Infidelity is a common experience within romantic relationships and is closely linked with
relationship dissolution and well-being. Using an intersectionality theoretical framework, we …

Friendships can foster happiness, health, and reproductive fitness. However, friendships
end—even when we might not want them to. A primary reason for this is interference from …

In both humans and nonhuman animals, mating strategies represent a set of evolutionary
adaptations aimed at promoting individual fitness by means of reproduction with the best …

This exploratory study analyzed which types of acts involving the Internet are considered
most severe, sex differences in the perceptions of infidelity, and the evaluation of infidelity …

To the extent that sex differences are mediated by mechanisms such as sex-roles and
beliefs, individual differences in these more proximate traits should account for significant …