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Life Histories

Life Histories

Applications of Life Tables

Applications of Life Tables

Life tables are versatile across various fields, providing a quantitative basis for analyzing mortality and survival rates. Whether used by demographers, actuaries, epidemiologists, or sociologists, life tables offer valuable insights into the dynamics of life and death, facilitating informed decisions in public health, insurance, conservation, and beyond. Their broad applicability highlights the interconnectedness of demographic data with practical outcomes in everyday life and strategic...

Natural Selection and Mating Preferences

Natural Selection and Mating Preferences

The principle of natural selection posits that organisms better adapted to their environment are more likely to survive and reproduce. This principle is closely intertwined with mating preferences, a key aspect of sexual selection, which evolutionary psychologists believe is driven by instincts to propagate one's genes. Such instincts significantly influence mating behaviors and preferences between genders.
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Longitudinal Research

Longitudinal Research

Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...

Criticisms of the Evolutionary Perspective

Criticisms of the Evolutionary Perspective

In a study where individuals posing as strangers offered compliments and proposed casual sex to students, the responses differed significantly based on gender. Not a single woman accepted the proposal, while 70% of the men agreed. This outcome provides a useful scenario to explore through the lens of evolutionary psychology and social learning theory, highlighting the diverse perspectives on human sexual behaviors.
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Mate Choice

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Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.

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Using the California Q-sort Measure of Life History Strategy to Predict Sexual Behavioral Outcomes.

Curtis S Dunkel¹, Lauren A Summerville, Eugene W Mathes

¹Department of Psychology, Western Illinois University, Macomb, 61455, IL, USA, c-dunkel@wiu.edu.

Archives of Sexual Behavior

|December 18, 2014

Summary

The California Q-set measure of life history (LH) strategy is a stable and valid predictor of reproductive behaviors from adolescence through early adulthood. This tool reliably forecasts outcomes like age of sexual debut and number of children.

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Area of Science:

Developmental Psychology
Behavioral Science
Human Reproduction

Background:

Life history (LH) strategy is a theoretical framework explaining individual differences in reproductive timing and investment.
The California Q-set is a tool used to assess personality and behavioral constructs.
Assessing the validity of LH strategy measures is crucial for understanding reproductive decision-making.

Purpose of the Study:

To examine the validity of the California Q-set measure of life history (LH) strategy.
To assess the stability of LH strategy ratings over time.
To determine if LH strategy ratings predict reproductive behaviors.

Main Methods:

Secondary analysis of longitudinal data.
Utilized the California Q-set measure of LH strategy at multiple ages.
Included six measures of reproductive behavior.
Sample size (N = 106) at base year.

Main Results:

LH strategy Q-sort ratings demonstrated stability between ages 14 and 23.
LH strategy ratings were significant prospective and concurrent predictors of reproductive behaviors.
LH strategy at age 14 predicted age of sexual debut, number of sexual partners, intercourse frequency, abortions, age at first birth, and risk of venereal disease up to age 32.

Conclusions:

The California Q-set measure of LH strategy is a valid and stable construct.
The measure effectively predicts a range of reproductive behaviors.
Future research should aim to streamline the measure while maintaining predictive power.