Strategic pluralism

Last updated

Strategic pluralism (also known as the dual-mating strategy) is a theory in evolutionary psychology regarding human mating strategies that suggests women have evolved to evaluate men in two categories: whether they are reliable long term providers, and whether they contain high quality genes. [1] The theory of strategic pluralism was proposed by Steven Gangestad and Jeffry Simpson, two professors of psychology at the University of New Mexico and Texas A&M University, respectively.

Contents

Experiments and studies

Although strategic pluralism is believed to occur for both animals and humans, the majority of experiments have been performed with humans. One experiment concluded that between short term and long-term relationships, males and females prioritized different things. It was shown that both preferred physical attractiveness for short term mates. However, for long term, females preferred males with traits that indicated that they could be better caretakers, whereas the males did not change their priorities. [2]

The experimenters used the following setup: subjects were given an overall 'budget' and asked to assign points to different traits. [3] For long-term mates, women gave more points to social and kindness traits, agreeing with results found in other studies suggesting that females prefer long-term mates who would provide resources and emotional security for them, as opposed to physically attractive mates. [4] [5] The females also prefer males who can offer them more financial security as this would help them raise their offspring. [6]

Females have also chosen males who have more feminine appearances because of a (hypothesized) inverse relationship between a male's facial attractiveness and effort willing to spend in raising offspring. That is, in theory, a more attractive male would put in less work as a caretaker while a less attractive male would put in more work. [7] On average, there is a wider amount of variability in male characteristics than in females. This suggests there are enough of both males more suited for short-term relationships and those more suited for longer relationships. [8]

Criticism

Bellis and Baker calculated that if double-mating strategy does occur, the rate of paternal discrepancy would be between 6.9 and 13.8%. [9] When taking kin selection into account, Gaulin, McBurney, and Brakeman-Wartell hypothesised that mother’s side of family is more certain that the child is their kin and therefore invest more. Based on this matrilateral bias they calculated the rate of cuckoldry to be roughly 13% to 20%. [10] These estimates were refuted by Y-chromosome tracking [11] and HLA tracking [12] [13] that put the estimates between 1-2%. David Buss, prominent evolutionary psychologist, cited this evidence as a reason to be sceptical of dual-mating strategy hypothesis. [14]

See also

Related Research Articles

Evolutionary psychology is a theoretical approach in psychology that examines cognition and behavior from a modern evolutionary perspective. It seeks to identify human psychological adaptations with regards to the ancestral problems they evolved to solve. In this framework, psychological traits and mechanisms are either functional products of natural and sexual selection or non-adaptive by-products of other adaptive traits.

<span class="mw-page-title-main">Sexual attraction</span> Attraction on the basis of sexual desire

Sexual attraction is attraction on the basis of sexual desire or the quality of arousing such interest. Sexual attractiveness or sex appeal is an individual's ability to attract other people sexually, and is a factor in sexual selection or mate choice. The attraction can be to the physical or other qualities or traits of a person, or to such qualities in the context where they appear. The attraction may be to a person's aesthetics, movements, voice, or smell, among other things. The attraction may be enhanced by a person's adornments, clothing, perfume or hair style. It can be influenced by individual genetic, psychological, or cultural factors, or to other, more amorphous qualities. Sexual attraction is also a response to another person that depends on a combination of the person possessing the traits and on the criteria of the person who is attracted.

<span class="mw-page-title-main">Seduction</span> Process of enticing a person to engage in sexual behaviour

In sexuality, seduction means enticing someone into sexual intercourse or other sexual activity.

Sociosexuality, sometimes called sociosexual orientation, is the individual difference in the willingness to engage in sexual activity outside of a committed relationship. Individuals who are more restricted sociosexually are less willing to engage in casual sex; they prefer greater love, commitment and emotional closeness before having sex with romantic partners. Individuals who are more unrestricted sociosexually are more willing to have casual sex and are more comfortable engaging in sex without love, commitment or closeness.

<span class="mw-page-title-main">Physical attractiveness</span> Aesthetic assessment of physical traits

Physical attractiveness is the degree to which a person's physical features are considered aesthetically pleasing or beautiful. The term often implies sexual attractiveness or desirability, but can also be distinct from either. There are many factors which influence one person's attraction to another, with physical aspects being one of them. Physical attraction itself includes universal perceptions common to all human cultures such as facial symmetry, sociocultural dependent attributes, and personal preferences unique to a particular individual.

<span class="mw-page-title-main">David Buss</span> American evolutionary psychologist (born 1953)

David Michael Buss is an American evolutionary psychologist at the University of Texas at Austin, researching human sex differences in mate selection. He is considered one of the founders of evolutionary psychology.

<span class="mw-page-title-main">Parental investment</span> Parental expenditure (e.g. time, energy, resources) that benefits offspring

Parental investment, in evolutionary biology and evolutionary psychology, is any parental expenditure that benefits offspring. Parental investment may be performed by both males and females, females alone or males alone. Care can be provided at any stage of the offspring's life, from pre-natal to post-natal.

<span class="mw-page-title-main">Psychological adaptation</span>

A psychological adaptation is a functional, cognitive or behavioral trait that benefits an organism in its environment. Psychological adaptations fall under the scope of evolved psychological mechanisms (EPMs), however, EPMs refer to a less restricted set. Psychological adaptations include only the functional traits that increase the fitness of an organism, while EPMs refer to any psychological mechanism that developed through the processes of evolution. These additional EPMs are the by-product traits of a species’ evolutionary development, as well as the vestigial traits that no longer benefit the species’ fitness. It can be difficult to tell whether a trait is vestigial or not, so some literature is more lenient and refers to vestigial traits as adaptations, even though they may no longer have adaptive functionality. For example, xenophobic attitudes and behaviors, some have claimed, appear to have certain EPM influences relating to disease aversion, however, in many environments these behaviors will have a detrimental effect on a person's fitness. The principles of psychological adaptation rely on Darwin's theory of evolution and are important to the fields of evolutionary psychology, biology, and cognitive science.

Human male sexuality encompasses a wide variety of feelings and behaviors. Men's feelings of attraction may be caused by various physical and social traits of their potential partner. Men's sexual behavior can be affected by many factors, including evolved predispositions, individual personality, upbringing, and culture. While most men are heterosexual, there are minorities of homosexual men and varying degrees of bisexual men.

Extra-pair copulation (EPC) is a mating behaviour in monogamous species. Monogamy is the practice of having only one sexual partner at any one time, forming a long-term bond and combining efforts to raise offspring together; mating outside this pairing is extra-pair copulation. Across the animal kingdom, extra-pair copulation is common in monogamous species, and only a very few pair-bonded species are thought to be exclusively sexually monogamous. EPC in the animal kingdom has mostly been studied in birds and mammals. Possible benefits of EPC can be investigated within non-human species, such as birds.

<span class="mw-page-title-main">Sexual selection in humans</span> Evolutionary effects of sexual selection on humans

Sexual selection in humans concerns the concept of sexual selection, introduced by Charles Darwin as an element of his theory of natural selection, as it affects humans. Sexual selection is a biological way one sex chooses a mate for the best reproductive success. Most compete with others of the same sex for the best mate to contribute their genome for future generations. This has shaped human evolution for many years, but reasons why humans choose their mates are not fully understood. Sexual selection is quite different in non-human animals than humans as they feel more of the evolutionary pressures to reproduce and can easily reject a mate. The role of sexual selection in human evolution has not been firmly established although neoteny has been cited as being caused by human sexual selection. It has been suggested that sexual selection played a part in the evolution of the anatomically modern human brain, i.e. the structures responsible for social intelligence underwent positive selection as a sexual ornamentation to be used in courtship rather than for survival itself, and that it has developed in ways outlined by Ronald Fisher in the Fisherian runaway model. Fisher also stated that the development of sexual selection was "more favourable" in humans.

In sexual relationships, concepts of age disparity, including what defines an age disparity, have developed over time and vary among societies. Differences in age preferences for mates can stem from partner availability, gender roles, and evolutionary mating strategies, and age preferences in sexual partners may vary cross-culturally. There are also social theories for age differences in relationships as well as suggested reasons for 'alternative' age-hypogamous relationships. Age-disparate relationships have been documented for most of recorded history and have been regarded with a wide range of attitudes dependent on sociocultural norms and legal systems.

Mate preferences in humans refers to why one human chooses or chooses not to mate with another human and their reasoning why. Men and women have been observed having different criteria as what makes a good or ideal mate. A potential mate's socioeconomic status has also been seen important, especially in developing areas where social status is more emphasized.

The Sociosexual Orientation Inventory(SOI-R) is a 9-item self-report questionnaire designed to measure individuals differences in the tendency to have casual, uncommitted sexual relationships. This tendency, termed sociosexuality or sociosexual orientation, is divided into three facets measured by the inventory: behavior, attitude and desire. The most recent revision is from 2008.

<span class="mw-page-title-main">Human mating strategies</span> Courtship behavior of humans

In evolutionary psychology and behavioral ecology, human mating strategies are a set of behaviors used by individuals to select, attract, and retain mates. Mating strategies overlap with reproductive strategies, which encompass a broader set of behaviors involving the timing of reproduction and the trade-off between quantity and quality of offspring.

<span class="mw-page-title-main">Extended female sexuality</span>

Extended female sexuality is where the female of a species mates despite being infertile. In most species, the female only engages in copulation when she is fertile. However, extended sexuality has been documented in Old World primates, pair bonded birds and some insects. Extended sexuality is most prominent in human females who exhibit no change in copulation rate across the ovarian cycle.

Mate value is derived from Charles Darwin's theory of evolution and sexual selection, as well as the social exchange theory of relationships. Mate value is defined as the sum of traits that are perceived as desirable, representing genetic quality and/or fitness, an indication of a potential mate's reproductive success. Based on mate desirability and mate preference, mate value underpins mate selection and the formation of romantic relationships.

Female intrasexual competition is competition between women over a potential mate. Such competition might include self-promotion, derogation of other women, and direct and indirect aggression toward other women. Factors that influence female intrasexual competition include the genetic quality of available mates, hormone levels, and interpersonal dynamics.

<span class="mw-page-title-main">Mate guarding in humans</span> Behaviours used to retain a mate

Human mate guarding refers to behaviours employed by both males and females with the aim of maintaining reproductive opportunities and sexual access to a mate. It involves discouraging the current mate from abandoning the relationship whilst also warding off intrasexual rivals. It has been observed in many non-human animals, as well as humans. Sexual jealousy is a prime example of mate guarding behaviour. Both males and females use different strategies to retain a mate and there is evidence that suggests resistance to mate guarding also exists.

The ovulatory shift hypothesis holds that women experience evolutionarily adaptive changes in subconscious thoughts and behaviors related to mating during different parts of the ovulatory cycle. It suggests that what women want, in terms of men, changes throughout the menstrual cycle. Two meta-analyses published in 2014 reached opposing conclusions on whether the existing evidence was robust enough to support the prediction that women's mate preferences change across the cycle. A newer 2018 review does not show women changing the type of men they desire at different times in their fertility cycle.

References

  1. Steven, Gangestad (2000). "The evolution of human mating: Trade-offs and strategic pluralism" (PDF). Behavioral and Brain Sciences. 23 (4): 573–644. doi:10.1017/S0140525X0000337X. PMID   11301543. S2CID   33245508. Archived from the original (PDF) on 2018-07-06 via Cambridge University Press.
  2. Li, Norman P.; Kenrick, Douglas T. (2006). "Sex similarities and differences in preferences for short-term mates: What, whether, and why". Journal of Personality and Social Psychology. 90 (3): 468–489. doi:10.1037/0022-3514.90.3.468. ISSN   1939-1315. PMID   16594832. S2CID   16627278.
  3. Li, Norman P.; Bailey, J. Michael; Kenrick, Douglas T.; Linsenmeier, Joan A. W. (2002). "The necessities and luxuries of mate preferences: Testing the tradeoffs". Journal of Personality and Social Psychology. 82 (6): 947–955. doi:10.1037/0022-3514.82.6.947. ISSN   1939-1315. PMID   12051582.
  4. Baize, Harold; Schroeder, Jonathan (1995). "Personality and Mate Selection in Personal Ads: Evolutionary Preferences in a Public Mate Selection Process". Journal of Social Behavior & Personality. 10: 517–536.
  5. Landolt, Monica A.; Lalumière, Martin L.; Quinsey, Vernon L. (January 1995). "Sex differences in intra-sex variations in human mating tactics: An evolutionary approach". Ethology and Sociobiology. 16 (1): 3–23. doi:10.1016/0162-3095(94)00012-v. ISSN   0162-3095.
  6. Hendrickson., Eagly, Alice (1987). Sex differences in social behavior : a social-role interpretation. Hillsdale, N.J.: L. Erlbaum Associates. ISBN   978-0898598049. OCLC   15084713.{{cite book}}: CS1 maint: multiple names: authors list (link)
  7. Penton-Voak, I; Cahill, S; Pound, N; Kempe, V; Schaeffler, S; Schaeffler, F (Summer 2007). "Male facial attractiveness, perceived personality, and child-directed speech". Evolution and Human Behavior. 28 (4): 253–259. Bibcode:2007EHumB..28..253P. doi:10.1016/j.evolhumbehav.2007.03.002. ISSN   1090-5138.
  8. Archer, John; Mehdikhani, Mani (2003). "Variability among males in sexually selected attributes". Review of General Psychology. 7 (3): 219–236. doi:10.1037/1089-2680.7.3.219. ISSN   1089-2680. S2CID   145329732.
  9. Bellis, Mark A.; Baker, R. Robin (1990). "Do females promote sperm competition? Data for humans". Animal Behaviour. 40 (5): 997–999. doi:10.1016/S0003-3472(05)81008-5.
  10. Gaulin, Steven J.C.; McBurney, Donald H.; Brakeman-Wartell, Stephanie L. (1997). "Matrilateral biases in the investment of aunts and uncles". Human Nature. 8 (2): 139–151. doi:10.1007/s12110-997-1008-4. PMID   26196775.
  11. Larmuseau, M. H. D.; Vanoverbeke, J.; Van Geystelen, A.; Defraene, G.; Vanderheyden, N.; Matthys, K.; Wenseleers, T.; Decorte, R. (7 December 2013). "Low historical rates of cuckoldry in a Western European human population traced by Y-chromosome and genealogical data". Proceedings of the Royal Society B: Biological Sciences. 280 (1772): 20132400. doi:10.1098/rspb.2013.2400. PMC   3813347 . PMID   24266034.
  12. Wolf, Michael; Musch, Jochen; Enczmann, Juergen; Fischer, Johannes (1 June 2012). "Estimating the Prevalence of Nonpaternity in Germany". Human Nature. 23 (2): 208–217. doi:10.1007/s12110-012-9143-y. PMID   22688803.
  13. Sasse, Georg; Müller, Hansjakob; Chakraborty, Ranajit; Ott, Jürg (1994). "Estimating the Frequency of Nonpaternity in Switzerland". Human Heredity. 44 (6): 337–343. doi:10.1159/000154241.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  14. Buss, David (November 14, 2017). "Sexual Conflict in Human Mating" (video). youtube.com. TEDx Talks.