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Related Concept Videos

Relationship with Other Adult Family Members and Siblings01:29

Relationship with Other Adult Family Members and Siblings

Other adult family members and siblings play a crucial role in shaping children’s social and emotional development. While parents or primary caregivers are often the central figures in early attachment and socialization, other adults in a child’s life, such as grandparents, aunts, and uncles, can significantly influence developmental outcomes. These influences depend on each adult’s personality and may help compensate when a primary caregiver is emotionally distant or inconsistent. For...
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Related Experiment Video

Updated: Jun 30, 2026

Assessing the Coherence of Parents' Short Narratives Regarding their Child Using the Five-Minute Speech Sample Procedure
07:56

Assessing the Coherence of Parents' Short Narratives Regarding their Child Using the Five-Minute Speech Sample Procedure

Published on: September 19, 2019

Efficacy and honesty in communication between relatives.

R A Johnstone1

  • 1Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, United Kingdom.

The American Naturalist
|September 25, 2008
PubMed
Summary

This study models honest communication with perceptual errors, finding a stable signaling equilibrium where costly signals evolve even with related individuals. Signal cost varies with relatedness and noise levels.

Area of Science:

  • Evolutionary Game Theory
  • Animal Communication
  • Behavioral Ecology

Background:

  • Honest communication models often neglect noise and perceptual errors.
  • Previous strategic models of signaling did not incorporate signal detection challenges.

Purpose of the Study:

  • To analyze how perceptual error affects the evolution of honest signaling in a strategic model.
  • To extend Maynard Smith's Philip Sidney game by including noise in signal transmission.

Main Methods:

  • Utilized an extended version of Maynard Smith's strategic model of signaling (Philip Sidney game).
  • Incorporated the possibility of perceptual error and noise into the signaling game between relatives.

Main Results:

  • Identified a unique, continuously stable signaling equilibrium under noise.

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  • Signal cost is inversely related to relatedness (r) and the probability of being needy.
  • Signaling stability is sensitive to noise levels, being unstable at both very high and very low noise.

    • Conclusions:

    • Costly signaling can evolve and remain stable despite perceptual errors and relatedness.
    • Signal cost serves dual roles: enhancing communication efficacy and deterring deceit.
    • Optimal noise levels are crucial for stable honest signaling equilibria.