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Evaluation of Auditory Brainstem Response in Chicken Hatchlings
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Chickens prefer beautiful humans.

Stefano Ghirlanda1, Liselotte Jansson2, Magnus Enquist2

  • 1Stockholm University, Sweden. stefano@zool.su.se.

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|July 21, 2015
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Summary
This summary is machine-generated.

Chickens learned to prefer human faces similar to those preferred by humans. This suggests that human sexual preferences may stem from general nervous system properties, not just specialized adaptations.

Keywords:
Facial attractivenessHandicap principleReceiver biasSexual selection

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Area of Science:

  • Comparative psychology
  • Neuroscience
  • Evolutionary biology

Background:

  • Human sexual preferences are complex and their origins are debated.
  • Existing theories propose both general nervous system properties and face-specific adaptations.

Purpose of the Study:

  • To investigate the fundamental basis of human facial preferences.
  • To determine if non-human animals can exhibit preferences mirroring human sexual preferences.
  • To test the hypothesis that preferences arise from general neural mechanisms.

Main Methods:

  • Chickens were trained to discriminate between average male and female human faces.
  • Preference tests were conducted to assess animal choices.
  • Animal preferences were compared with human sexual preference data.

Main Results:

  • Chickens demonstrated preferences for faces aligning with human sexual preferences.
  • The trained preference was specific to the trained face type (male or female).

Conclusions:

  • Human sexual preferences may be rooted in general properties of nervous systems.
  • Findings challenge the notion that preferences are solely due to face-specific evolutionary adaptations.
  • Suggests a broader biological basis for mate selection cues.