Biological formation of personal relationships ERQ

INTRODUCTION - BIOLOGICAL FORMATION OF RELATIONSHIPS

The biological approach explains relationship formation through evolutionary processes, suggesting that human mating preferences are shaped by natural selection to maximise reproductive success. These preferences differ between males and females due to differences in reproductive roles. This essay will discuss this explanation using Buss et al. (1989) and Clark & Hatfield (1989).

Definition - Evolutionary Theory of Attraction

This theory proposes that mate preferences evolved because they increased reproductive success and survival of offspring.

Definition - Inter-sexual Selection

Refers to how males and females have different preferences in choosing partners based on evolutionary pressures.

Definition - Female Choosiness

The idea that females are more selective in mate choice because reproduction carries higher biological costs (pregnancy, child-rearing).

BUSS ET AL. (1989) - AIM

To investigate whether sex differences in mate preferences are consistent across cultures, supporting an evolutionary explanation.

BUSS ET AL. (1989) - PARTICIPANTS

Over 10,000 participants from 37 cultures across six continents and five islands, with varied sampling methods and a mean age of early 20s.

BUSS ET AL. (1989) - PROCEDURE

Participants completed questionnaires including biographical data, preferred marriage characteristics, and ratings/rankings of traits (e.g. attractiveness, financial prospects). Materials were translated into multiple languages using gender-neutral terms.

BUSS ET AL. (1989) - RESULTS

Males consistently preferred younger and more physically attractive partners. Females preferred partners with financial prospects and ambition across almost all cultures.

BUSS ET AL. (1989) - CONCLUSION

Mate preferences are universal and reflect evolutionary pressures: males prioritise fertility cues, while females prioritise resource acquisition.

BUSS ET AL. (1989) - STRENGTHS

Large cross-cultural sample increases generalisability. Consistent findings across cultures support universality of evolutionary mechanisms. Standardised questionnaires improve reliability.

BUSS ET AL. (1989) - LIMITATIONS

Use of self-report questionnaires may lead to social desirability bias. Cultural differences in interpreting questions may affect validity. Does not account for changing social roles (e.g. women's independence).

CLARK & HATFIELD (1989) - AIM

To investigate gender differences in willingness to engage in casual sexual relationships.

CLARK & HATFIELD (1989) - PARTICIPANTS

96 university students (48 male, 48 female) from Florida, approached on campus.

CLARK & HATFIELD (1989) - PROCEDURE

Confederates (5 college women and 4 college men) approached opposite-sex participants and made one of three requests: go on a date, go to their apartment, or have sex. Responses were recorded. Confederates only approached individuals they found attractive. One trial was conducted in 1978, one in 1982

CLARK & HATFIELD (1989) - RESULTS

Around 50% of both sexes agreed to a date. However, ~70% of men agreed to go to the apartment and ~70-75% agreed to sex, while 0-6% of women agreed to go to the apartment and 0% agreed to sex

CLARK & HATFIELD (1989) - CONCLUSION

Men are less selective and more willing to engage in casual sex, while women are more selective, supporting evolutionary theory and female choosiness.

CLARK & HATFIELD (1989) - STRENGTHS

High ecological validity due to real-life setting. Naïve participants reduce demand characteristics. Replication across years increases reliability.

CLARK & HATFIELD (1989) - LIMITATIONS

Extraneous variables (e.g. attractiveness, relationship status) not controlled. Ethical concerns (potential distress). Cultural bias (US students only). Social norms may influence responses (e.g. men expected to say yes).

HOLISTIC DISCUSSION - Evolutionary explanation of sex differences

Both studies support the idea that males and females have evolved different mating strategies: males maximise reproductive success through quantity, while females prioritise quality due to higher biological investment in offspring.

HOLISTIC DISCUSSION - Role of reproductive biology ("sperm is cheap, eggs are expensive")

The biological cost of reproduction explains female choosiness. Women risk pregnancy and long-term caregiving, so they select partners with resources, whereas men can reproduce with minimal investment, increasing willingness for casual sex.

HOLISTIC DISCUSSION - Cross-cultural universality vs cultural influence

Buss et al. suggests universality of mate preferences, but cultural factors (e.g. gender roles, economic independence) may shape or override biological tendencies, limiting a purely biological explanation.

HOLISTIC DISCUSSION - Social and cultural changes

Modern societal changes (e.g. women's financial independence, contraception) challenge evolutionary explanations, as mate preferences may shift beyond reproductive concerns.

HOLISTIC DISCUSSION - Reductionism of biological explanation

The theory reduces complex human relationships to reproductive instincts, ignoring cognitive, emotional, and social influences such as love, personality, and shared values.

HOLISTIC DISCUSSION - Heteronormative bias

Evolutionary theory focuses on heterosexual reproduction, failing to explain same-sex relationships or relationships not aimed at reproduction, limiting its applicability.

HOLISTIC DISCUSSION - Methodological considerations

Buss et al. relies on self-report (low ecological validity), while Clark & Hatfield has high ecological validity but low control. Together, they provide complementary evidence but also highlight methodological trade-offs.

HOLISTIC DISCUSSION - Ethical considerations

Clark & Hatfield raises ethical concerns (potential embarrassment/distress), highlighting the challenge of studying real-life attraction while protecting participants.

HOLISTIC DISCUSSION - Interaction with cognition and social factors

Human relationships are influenced by higher-order cognition (e.g. decision-making, personal values), suggesting that biology provides a foundation but not a complete explanation.

HOLISTIC DISCUSSION - Overall evaluation

While biological explanations are supported by empirical evidence and provide a strong foundation for understanding attraction, they are incomplete. A full explanation of relationship formation must consider the interaction between biological, cognitive, and sociocultural factors.