Parental Investment Theory
Investment in offspring
Parental Investment Theory, proposed by Robert Trivers, explains how the sex that invests more in offspring will be more discriminating or selective about mating. This theory is based on the idea that the sex with the greater initial investment in offspring will be more choosy about their mates, as they have more to lose if they make a poor choice.
- The sex that invests more in offspring will be more discriminating or selective about mating.
- The sex that invests less in offspring will be more competitive for sexual access to the high-investing sex.
- Parental investment is a key factor in determining mating behaviors.
- Determine the level of parental investmentDetermine the level of parental investment for each sex, including the amount of time, energy, and resources invested in offspring.Pro tipConsider the evolutionary history of the species and the current environmental pressures.WarningBe aware of the potential for deception and manipulation in mating behaviors.
- Assess the level of choosinessAssess the level of choosiness for each sex, including the criteria used to evaluate potential mates.Pro tipConsider the potential benefits and costs of being choosy, including the risk of missing out on potential mates.WarningBe aware of the potential for cultural and social influences on mating behaviors.
- Evaluate the level of competitionEvaluate the level of competition for each sex, including the strategies used to attract and retain mates.Pro tipConsider the potential benefits and costs of competition, including the risk of injury or exhaustion.WarningBe aware of the potential for deception and manipulation in mating behaviors.
In humans, women tend to be more choosy about their mates due to their greater initial investment in offspring. Men, on the other hand, tend to be more competitive for sexual access to women.
The theory was first proposed by Robert Trivers in 1972, as a way to explain the differences in mating behaviors between males and females. Trivers argued that the sex with the greater initial investment in offspring would be more selective about their mates, as they have more to lose if they make a poor choice.