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Related Concept Videos

What is Natural Selection?01:32

What is Natural Selection?

Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.The Theory of Natural...
Types of Selection01:46

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...
Limits to Natural Selection01:38

Limits to Natural Selection

Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.For one, natural selection can only act upon existing genetic variation. Hypothetically, redtusks may enhance elephant survival by deterring ivory-seeking poachers. However, if there are no gene variants—or alleles—for redtusks, natural selection cannot increase the prevalence of...
Natural Selection and Adaptation01:15

Natural Selection and Adaptation

Natural selection, a fundamental concept in evolutionary biology, is the mechanism by which evolution is driven, favoring organisms that are best adapted to their environments. This process enhances their chances of survival and reproduction. Adaptation, a key outcome of this process, involves genetic modifications that optimize an organism's functionality under specific environmental challenges, such as extreme cold or thinner air at high altitudes.
Beyond physical adaptations, psychological...
Frequency-dependent Selection01:21

Frequency-dependent Selection

When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.Positive Frequency-Dependent SelectionIn positive...
Perception01:28

Perception

Perception is a fundamental psychological process that enables individuals to organize, interpret, and consciously experience sensory information. This process is crucial for understanding and interacting with the world around us. It includes both bottom-up and top-down processing, each playing a distinct role in how we perceive our environment.
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Related Experiment Video

Updated: Jun 10, 2026

Visualizing Visual Adaptation
04:43

Visualizing Visual Adaptation

Published on: April 24, 2017

Natural selection and veridical perceptions.

Justin T Mark1, Brian B Marion, Donald D Hoffman

  • 1Department of Cognitive Science, University of California, Irvine, CA 92697, USA. jtmark@uci.edu

Journal of Theoretical Biology
|July 28, 2010
PubMed
Summary
This summary is machine-generated.

Natural selection may not always favor accurate perceptions. Non-veridical, utility-focused strategies can outperform reality-based ones, suggesting further study into sensory perception evolution is needed.

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Area of Science:

  • Evolutionary Biology
  • Cognitive Science
  • Philosophy of Mind

Background:

  • The common assumption is that natural selection favors veridical perceptions, which accurately represent the environment.
  • This influential claim in perception studies lacks rigorous empirical testing.

Purpose of the Study:

  • To formally test whether natural selection favors veridical perceptions.
  • To investigate the evolutionary dynamics between veridical and non-veridical perceptual strategies.

Main Methods:

  • Formalization of the claim and alternative hypotheses.
  • Introduction of "interface games," a novel class of evolutionary games.
  • Analysis using closed-form solutions and Monte Carlo simulations under frequency-dependent selection.

Main Results:

  • Veridical perceptions can be outcompeted and driven to extinction.
  • Non-veridical strategies, optimized for utility over accuracy, can prevail.
  • Evolutionary game models demonstrate potential selection against veridicality.

Conclusions:

  • Natural selection does not necessarily favor perceptions that accurately depict objective reality.
  • The evolution of sensory perception may be driven by factors other than pure veridicality.
  • Further research is warranted on the evolutionary pressures shaping sensory perception.