David M. Buss

Sex differences in human mate preferences: Evolutionary hypotheses tested in 37 cultures

Contemporary mate preferences can provide important clues to human reproductive history. Little is known about which characteristics people value in potential mates. Five predictions were made about sex differences in human mate preferences based on evolutionary conceptions of parental investment, sexual selection, human reproductive capacity, and sexual asymmetries regarding certainty of paternity versus maternity. The predictions centered on how each sex valued earning capacity, ambition— industriousness, youth, physical attractiveness, and chastity. Predictions were tested in data from 37 samples drawn from 33 countries located on six continents and five islands (total N = 10,047). For 27 countries, demographic data on actual age at marriage provided a validity check on questionnaire data. Females were found to value cues to resource acquisition in potential mates more highly than males. Characteristics signaling reproductive capacity were valued more by males than by females. These sex differences may reflect different evolutionary selection pressures on human males and females; they provide powerful cross-cultural evidence of current sex differences in reproductive strategies. Discussion focuses on proximate mechanisms underlying mate preferences, consequences for human intrasexual competition, and the limitations of this study.

Sexual Strategies Theory: An Evolutionary Perspective on Human Mating

This article proposes a contextual-evolutionary theory of human mating strategies. Both men and women are hypothesized to have evolved distinct psychological mechanisms that underlie short-term and long-term strategies. Men and women confront different adaptive problems in short-term as opposed to long-term mating contexts. Consequently, different mate preferences become activated from their strategic repertoires. Nine key hypotheses and 22 predictions from Sexual Strategies Theory are outlined and tested empirically. Adaptive problems sensitive to context include sexual accessibility, fertility assessment, commitment seeking and avoidance, immediate and enduring resource procurement, paternity certainty, assessment of mate value, and parental investment. Discussion summarizes 6 additional sources of behavioral data, outlines adaptive problems common to both sexes, and suggests additional contexts likely to cause shifts in mating strategy.

Preferences in Human Mate Selection

In this article we examine preferences in mate choice within the broader context of the human mating system. Specifically, we discuss the consequences of mate preferences for the processes of assortative mating and sexual selection. In Study 1 (N = 184) we document (a) the mate characteristics that are consensually more and less desired, (b) the mate characteristics that show strong sex differences in their preferred value, (c) the degree to which married couples are correlated in selection preferences, and (d) the relations between expressed preferences and the personality and background characteristics of obtained spouses. In Study 2 (N = 100) we replicated the sex differences and consensual ordering of mate preferences found in Study I, using a different methodology and a differently composed sample. Lastly, we present alternative hypotheses to account for the replicated sex differences in preferences for attractiveness and earning potential. Neither men nor women prefer all members of the opposite sex equally. Some are favored over others, and one important research task is to identify the characteristics that prospective mates consider to be important. Although mate choice is clearly a crucial adult decision for more than 90% of the population (Price & Vandenberg, 1980), surprisingly little is known about the characteristics that men and women seek in potential mates (Thiessen & Gregg, 1980). In this article we develop a conception of the role of mate preferences within the human mating system. Specifically, we address the consequences for sexual selection and assortative mating. In two empirical studies we document several basic features of this conception.

Error management theory: A new perspective on biases in cross-sex mind reading.

A new theory of cognitive biases, called error management theory (EMT), proposes that psychological mechanisms are designed to be predictably biased when the costs of false-positive and false-negative errors were asymmetrical over evolutionary history. This theory explains known phenomena such as mens overperception of womens sexual intent, and it predicts new biases in social inference such as womens underestimation of mens commitment. In Study 1 (N = 217), the authors documented the commitment underperception effect predicted by EMT. In Study 2 (N = 289), the authors replicated the commitment bias and documented a condition in which mens sexual overperception bias is corrected. Discussion contrasts EMT with the heuristics and biases approach and suggests additional testable hypotheses based on EMT.

The Evolution of Human Intrasexual Competition: Tactics of Mate Attraction

Darwins theory of sexual selection suggests that individuals compete with members of their own sex for reproductively relevant resources held by members of the opposite sex. Four empirical studies were conducted to identify tactics of intrasexual mate competition and to test four evolution-based hypotheses. A preliminary study yielded a taxonomy of tactics. Study 1 used close-friend observers to report performance frequencies of 23 tactics to test the hypotheses. Study 2 replicated Study 1s results by using a different data source and subject population. Study 3 provided an independent test of the hypotheses in assessing the perceived effectiveness of each tactic for male and female actors. Although the basic hypotheses were supported across all three studies, there were several predictive failures and unanticipated findings. Discussion centers on the heuristic as well as predictive role of evolutionary theory, and on implications for other arenas of intrasexual competition.

From Vigilance to Violence: Mate Retention Tactics in Married Couples

Although much research has explored the adaptive problems of mate selection and mate attraction, little research has investigated the adaptive problem of mate retention. We tested several evolutionary psychological hypotheses about the determinants of mate retention in 214 married people. We assessed the usage of 19 mate retention tactics ranging from vigilance to violence. Key hypothesized findings include the following: Mens, but not womens, mate retention positively covaried with partners youth and physical attractiveness. Womens, but not mens, mate retention positively covaried with partners income and status striving. Mens mate retention positively covaried with perceived probability of partners infidelity. Men, more than women, reported using resource display, submission and debasement, and intrasexual threats to retain their mates. Women, more than men, reported using appearance enhancement and verbal signals of possession. Discussion includes an evolutionary psychological analysis of mate retention in married couples.

From vigilance to violence: Tactics of mate retention in American undergraduates

Although the attraction and selection of mates are central to human reproduction, the retention of acquired mates is often necessary to actualize the promise of reproductive effort. Three empirical studies used act frequency methods to identify, assess the reported performance frequencies of, and evaluate the perceived effectiveness of 19 tactics and 104 acts of human mate guarding and retention. In Study 1 (N = 105), a hierarchical taxonomy of tactics was developed from a pool of nominated acts. We then assessed the reported performance frequencies of 19 retention tactics and 104 acts and tested three hypotheses derived from evolutionary models in an undergraduate sample (N = 102). Study 2 (N = 46) provided an independent test of these hypotheses by assessing the perceived effectiveness of each tactic. Discussion draws implications for sexual poaching, susceptibility to pair-bond defection, and the power of act frequency methods for preserving the proximate specificity and systemic complexity inherent in human mating processes.

International Preferences in Selecting Mates: A Study of 37 Cultures

This study sought to identify the effects of culture and sex on mate preferences using samples drawn world-wide. Thirty-seven samples were obtained from 33 countries located on six continents and five islands (N = 9,474). Hierarchical multiple regressions revealed strong effects of both culture and sex, moderated by specific mate characteristics. Chastity proved to be the mate characteristic on which cultures varied the most. The preference ordering of each sample was contrasted with an international complement. Each culture displayed a unique preference ordering, but there were some similarities among all cultures as reflected in a positive manifold of the cross-country correlation matrix. Multidimensional scaling of the cultures yielded a five dimensional solution, the first two of which were interpreted. The first dimension was interpreted as Traditional versus Modern, with China, India, Iran, and Nigeria anchoring one end and the Netherlands, Great Britain, Finland, and Sweden anchoring the other. The second dimension involved valuation of education, intelligence, and refinement. Consistent sex differences in value attached to eaming potential and physical attractiveness supported evolution-based hypotheses about the importance of resources and reproductive value in mates. Discussion emphasizes the importance of psychological mate preferences for scientific disciplines ranging from evolutionary biology to sociology.

Selection, evocation, and manipulation.

This article proposes three key mechanisms by which personality and social processes are intrinsically linked. Selection deals with the manner in which individuals choose to enter or avoid existing environments. Evocation is defined by the ways in which individuals unintentionally elicit predictable reactions from others in their social environments. Manipulation deals with the tactics that individuals use intentionally to alter, shape, exploit, or change the social environments they inhabit. Empirical findings from 57 dating couples (undergraduates), and previous research within social, personality, and developmental psychology, are used to illustrate the heuristic value of this framework.

Adaptations, Exaptations, and Spandrels

Adaptation and natural selection are central concepts in the emerging science of evolutionary psychology. Natural selection is the only known causal process capable of producing complex functional organic mechanisms. These adaptations, along with their incidental by-products and a residue of noise, comprise all forms of life. Recently, S. J. Gould (1991) proposed that exaptations and spandrels may be more important than adaptations for evolutionary psychology. These refer to features that did not originally arise for their current use but rather were co-opted for new purposes. He suggested that many important phenomena--such as art, language, commerce, and war--although evolutionary in origin, are incidental spandrels of the large human brain. The authors outline the conceptual and evidentiary standards that apply to adaptations, exaptations, and spandrels and discuss the relative utility of these concepts for psychological science.