Sarah E. Ainsworth

Sex begets violence: mating motives, social dominance, and physical aggression in men

There are sizable gender differences in aggressive behavior, with men displaying a much higher propensity for violence than women. Evolutionary theories suggest that mens more violent nature derives in part from their historically greater need to compete over access to potential mates. The current research investigates this link between mating and male violence and provides rigorous experimental evidence that mating motives cause men to behave violently toward other men. In these studies, men and women were primed with a mating motive and then performed a noise-blast aggression task. Being primed with mating led men, but not women, to deliver more painful blasts of white noise to a same-sex partner (but not an opposite-sex partner). This effect was particularly pronounced among men with an unrestricted sociosexual orientation, for whom competition over access to new mates is an especially relevant concern. Findings also suggest that mating-induced male violence is motivated by a desire to assert ones dominance over other men: when men were given feedback that they had won a competition with their partner (and thus had achieved dominance through nonaggressive means), the effect of the mating prime on aggression was eliminated. These findings provide insight into the motivational roots of male aggression and illustrate the value of testing theories from evolutionary biology with rigorous experimental methods.

Subjective correlates and consequences of belief in free will

Four studies measured or manipulated beliefs in free will to illuminate how such beliefs are linked to other aspects of personality. Study 1 showed that stronger belief in free will was correlated with more gratitude, greater life satisfaction, lower levels of perceived life stress, a greater sense of self-efficacy, greater perceived meaning in life, higher commitment in relationships, and more willingness to forgive relationship partners. Study 2 showed that the belief in free will was a stronger predictor of life satisfaction, meaning in life, gratitude, and self-efficacy than either locus of control or implicit person theory. Study 3 showed that experimentally manipulating disbelief in free will caused a reduction in the perceived meaningfulness of life. Study 4 found that inducing a stronger belief in free will caused people to set more meaningful goals for themselves. The possible concern that believers in free will simply claim all manner of positive traits was contradicted by predicted null findings with regard to sense of humor, empathy, and self-rated attractiveness. Taken together, the present studies show that the belief in free will is a strong predictor of several positive traits and outcomes.

The Making of Might-Have-Beens Effects of Free Will Belief on Counterfactual Thinking

Counterfactual thoughts are based on the assumption that one situation could result in multiple possible outcomes. This assumption underlies most theories of free will and contradicts deterministic views that there is only one possible outcome of any situation. Three studies tested the hypothesis that stronger belief in free will would lead to more counterfactual thinking. Experimental manipulations (Studies 1-2) and a measure (Studies 3-4) of belief in free will were linked to increased counterfactual thinking in response to autobiographical (Studies 1, 3, and 4) and hypothetical (Study 2) events. Belief in free will also predicted the kind of counterfactuals generated. Belief in free will was associated with an increase in the generation of self and upward counterfactuals, which have been shown to be particularly useful for learning. These findings fit the view that belief in free will is promoted by societies because it facilitates learning and culturally valued change.

A meta-analysis of social networking online and social capital.

Social networking sites offer new avenues for interpersonal communication that may enable people to build social capital. The meta-analyses reported in this paper evaluated the relationship between social network site (SNS) use and 2 types of social capital: bridging social capital and bonding social capital. The meta-analyses included data from 58 articles gathered through scholarly databases and a hand search of the early publications of relevant journals. Using a random effects model, the overall effect size of the relationship between SNS use and bridging social capital based on k = 50 studies and N = 22,290 participants was r = .32 (95% CI [.27, .37]), and the overall effect size between SNS use and bonding social capital based on k = 43 studies and N = 19,439 participants was r = .26 (95% CI [.22, .31]). The relationships between SNS use and both types of social capital were stronger in men than in women, and the relationship between SNS use and bridging capital was stronger in Western, individualistic countries than Eastern, collectivistic countries. Additional analyses of specific SNS activities indicated that SNS use promotes social capital by facilitating contact and interaction among people who already know each other offline rather than contact with people who were met online. The implication is that SNSs offer a platform to strengthen existing relationships.

Assailing the Competition Sexual Selection, Proximate Mating Motives, and Aggressive Behavior in Men

Throughout history, men have tended to be more violent than women. Evolutionary theories suggest that this sex difference derives in part from their historically greater need to compete with other men over access to potential mates. In the current research, men and women (Experiment 1) or men only (Experiments 2 and 3) underwent a mating motive prime or control prime, and then performed a task designed to measure aggression toward a same-sex partner. The mating prime increased aggression among men, but not women (Experiment 1). Furthermore, mating-related increases in aggression were directed only toward men who were depicted as viable intrasexual rivals, including a dominant (vs. non-dominant) male partner (Experiment 2) and a man who was depicted as single (versus married) and looking for a mate (Experiment 3). This research provides a picture of male intrasexual aggression as highly selective and aimed strategically at asserting one’s dominance over sexual rivals.

An Active-Learning Approach to Fostering Understanding of Research Methods in Large Classes:

The current investigation tested the effectiveness of an online student research project designed to supplement traditional methods (e.g., lectures, discussions, and assigned readings) of teaching research methods in a large-enrollment Introduction to Psychology course. Over the course of the semester, students completed seven assignments, each representing a stage of the research process. Students formed hypotheses, tested their hypotheses using data from the class, interpreted their results, generated future directions, created PowerPoint slides summarizing their projects, and presented their results in a poster session. We found support for the hypothesis that the research methods intervention would lead to better performance on a research methods quiz compared to students in a nonintervention section taught by the same instructor. This intervention demonstrated that it is feasible to use project-oriented active-learning techniques to foster understanding of research methods in large classes.

Cooperation and fairness depend on self-regulation.

Any evolved disposition for fairness and cooperation would not replace but merely compete with selfish and other antisocial impulses. Therefore, we propose that human cooperation and fairness depend on self-regulation. Evidence shows reductions in fairness and other prosocial tendencies when self-regulation fails.

Differentiating selves facilitates group outcomes

The target article proposed that differentiation of selves is a crucial moderator of group outcomes, such that differentiation of selves contributes to beneficial outcomes of groups while limiting undesirable outcomes. In this response, we aim to complement the target article by refining and expanding several aspects of the theory. We address our conceptualization of optimal group functioning, clarify the term differentiation of selves, comment on the two-step nature of our model, offer theoretical connections and extensions, and discuss applications and opportunities for future research.

Differentiation of individual selves facilitates group-level benefits of ultrasociality.

Gowdy & Kralls target article complements our recent theorizing on group behavior. In our comment, we elucidate complementary aspects of the two theories and highlight the importance of differentiation of selves for human groups to reap the benefits of ultrasociality. We propose that achieving optimal group outcomes depends on the differentiation of individual selves.