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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.
Females, due to their biological roles in conception, pregnancy, and nursing, inherently...

Mate Choice

Mate Choice

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.

Facial Feedback Hypothesis

Facial Feedback Hypothesis

Charles Darwin proposed that facial expressions are an evolutionary adaptation for communication. He argued that these expressions are not influenced by culture but are universal across species. For example, a snarling expression with exposed teeth signals a threat in many animals, including humans. Darwin also suggested that displaying an emotion can intensify the feeling. Smiling, for example, could enhance one's sense of happiness. This idea laid the foundation for understanding the role of...

Relationship Formation

Relationship Formation

What do you think is the single most influential factor in determining with whom you become friends and whom you form romantic relationships? You might be surprised to learn that the answer is simple: the people with whom you have the most contact. This most important factor is proximity. You are more likely to be friends with people you have regular contact with. For example, there are decades of research that shows that you are more likely to become friends with people who live in your dorm,...

Types of Selection

Types of Selection

Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...

Evolutionary Psychology

Evolutionary Psychology

Evolutionary psychology explores the origins of human behavior and mental processes by framing them within the context of natural selection, a theory famously propounded by Charles Darwin. This field asserts that many behaviors common across human societies — ranging from instinctive fear reactions to complex social interactions — arose as evolutionary adaptations. These adaptations enhanced the survival and reproductive success of our ancestors, thereby becoming embedded in the human psyche...

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Related Experiment Video

Updated: May 24, 2026

Determining Ultrasonic Vocalization Preferences in Mice using a Two-choice Playback Test

Determining Ultrasonic Vocalization Preferences in Mice using a Two-choice Playback Test

Published on: September 3, 2015

Sexual selection on human faces and voices.

David A Puts¹, Benedict C Jones, Lisa M DeBruine

¹Department of Anthropology, Pennsylvania State University, University Park, PA 16802, USA. dap27@psu.edu

Journal of Sex Research

|March 3, 2012

Summary

Human faces and voices show significant sex differences, likely shaped by sexual selection. Masculine traits in men signal mate value and threat, influencing female choice and male competition.

Area of Science:

Evolutionary biology
Human evolution
Sexual selection

Background:

Humans exhibit pronounced sexual dimorphism, particularly in facial and vocal characteristics.
Sexual selection, favoring traits that enhance mating success, is a key evolutionary mechanism.
Understanding sex differences in humans can illuminate evolutionary pathways.

Purpose of the Study:

To explore how sexual selection shaped human facial and vocal traits.
To investigate the roles of female mate choice and male contests in male evolution.
To demonstrate how masculinity in faces and voices conveys information about mate value and threat potential.

Main Methods:

Review of existing research on human facial and vocal sex differences.
Analysis of evidence for sexual selection acting on male traits.

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Eliciting and Analyzing Male Mouse Ultrasonic Vocalization (USV) Songs

Eliciting and Analyzing Male Mouse Ultrasonic Vocalization (USV) Songs

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Related Experiment Videos

Last Updated: May 24, 2026

Determining Ultrasonic Vocalization Preferences in Mice using a Two-choice Playback Test

Determining Ultrasonic Vocalization Preferences in Mice using a Two-choice Playback Test

Published on: September 3, 2015

Memorization-Based Training and Testing Paradigm for Robust Vocal Identity Recognition in Expressive Speech Using Event-Related Potentials Analysis

Memorization-Based Training and Testing Paradigm for Robust Vocal Identity Recognition in Expressive Speech Using Event-Related Potentials Analysis

Published on: August 9, 2024

Eliciting and Analyzing Male Mouse Ultrasonic Vocalization (USV) Songs

Eliciting and Analyzing Male Mouse Ultrasonic Vocalization (USV) Songs

Published on: May 9, 2017

Examination of women's preferences and men's responses to masculine cues.

Main Results:

Sexual selection has influenced both male and female human traits.
Masculine facial and vocal features signal men's reproductive fitness and competitive ability.
Women's preferences and men's social behavior align with these signals.

Conclusions:

Facial and vocal masculinity are critical in human mating dynamics.
These traits likely evolved through female choice and male-male competition.
Future research should further explore the impact of masculinity on reproductive success.