Discuss sex differences in parental investment Free Essays.

Differential parental investment refers to differences between parents in the amount of resources invested in offspring (Trivers 1972). As either sex increases investment in offspring, they become more selective about choosing mates. Members of the other sex consequently compete to be chosen. In mammals, females have an initially high investment (due to internal gestation and nursing). Because.

Parental investment theory, a term coined by Robert Trivers in 1972, predicts that the sex that invests more in its offspring will be more selective when choosing a mate, and the less-investing sex will have intra-sexual competition for access to mates. This theory has been influential in explaining sex differences in sexual selection and mate.

Parental investment theory addresses sex differences that result from the trade-off between parenting effort and mating effort. For example, relative to men, women spend more time caring for.

Sex differences in psychology are differences in the mental functions and behaviors of the sexes, and are due to a complex interplay of biological, developmental, and cultural factors. Differences have been found in a variety of fields such as mental health, cognitive abilities, personality, emotion, sexuality, and tendency towards aggression.

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Parental investment and physical aggression among males INTRODUCTION Past research has suggested that men may be more physically aggressive or violent than women. Before exploring the reasons of this difference between men and women the first step is to make clear what is meant by the term aggression, and what is meant by violence. First, these.

Discuss sex differences in Parental Investment (24 marks) The biggest and most apparent different in parental investment is that it is much easier for males to pot out o parental investment, than it is for women. Parental investment theory suggests that the sex that makes the larger investment (females) will be more sexually discriminating when.

Parental Investment and Parental Care. Parental investment theory is a branch of life history theory. The earliest consideration of parental investment is given by Fisher (1930), Fisher's principle, wherein Fisher argued that parental expenditure on both sexes of offspring should be equal. Clutton-Brock (1991: 9) expanded the concept of PI to.

The models highlight two areas that merit future attention: first, allowing the parental investment strategy of the parent and the developmental strategy of the offspring to coevolve in an evolutionary game, and second, treating the discrimination of offspring sex by parents as a signalling problem.

Parental Investment and Sexual Selection Introduction Charles Darwin's (1871) treatment of the topic of sexual selection was sometimes confused because he lacked a general framework within which to relate the variables he perceived to be important: sex-linked inheritance, sex ratio at conception, differential.

IDA- Evolutionary explanations are reductionist; Rowe (2002) suggests that an explanation of paternal investment based on evolutionary factors alone is severely limited. Men's parental behavior depends on various personal and social conditions, including the quality of.

Abstract. ABSTRACT Individual differences are explicitly connected to social interaction in Darwin's notion of sexual selection Traits that increase the probability of successful reproduction will tend to increase in frequency This process operates partly through differential choice, by one sex, of certain traits in the other According to the parental investment model, females frequently have.