By agata janiszewska samantha godfrey and jessica marquez for dr mill s psych 310 class spring 2011
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Puts, D. A., Gaulin S. J. C., & Verdolini, K. (2006). Dominance and the evolution of sexual dimorphism in human voice pitch. Evolution and Human Behavior, 27, 283 – 296. By: Agata Janiszewska, Samantha Godfrey, and Jessica Marquez For Dr. Mill’s Psych 310 Class, Spring 2011. Voice Pitch.

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By agata janiszewska samantha godfrey and jessica marquez for dr mill s psych 310 class spring 2011

Puts, D. A., Gaulin S. J. C., & Verdolini, K. (2006). Dominance and the evolution of sexual dimorphism in human voice pitch. Evolution and Human Behavior, 27, 283 – 296.

By: Agata Janiszewska, Samantha Godfrey, and Jessica Marquez

For Dr. Mill’s Psych 310 Class, Spring 2011


Voice pitch
Voice Pitch Dominance and the evolution of sexual dimorphism in human voice pitch.

Pu, D.A., Gaulin S.J., & Verdolini, K. (2006). Dominance and the evolution of sexual dimorphism in human voice pith. Evolution and Human Behavior, 27, 283 - 296.


Study
Study Dominance and the evolution of sexual dimorphism in human voice pitch.

  • Evolution of voice pitch dimorphism

  • Male pitch suggests dominance

    • Intrasexual selection

    • Intersexual selection

Pu, D.A., Gaulin S.J., & Verdolini, K. (2006). Dominance and the evolution of sexual dimorphism in human voice pith. Evolution and Human Behavior, 27, 283 - 296.


Methods
Methods Dominance and the evolution of sexual dimorphism in human voice pitch.

  • 3 predictions:

    • Does voice pitch signal dominance to other males?

    • Is voice pitch change in response to circumstantial dominance?

    • Does voice pitch increase mating success?

      2 Groups: Raters & Participants

      Participants answered a survey read a passage out loud and then competed for a date.

      Raters answered questions on the participant’s dominance

Pu, D.A., Gaulin S.J., & Verdolini, K. (2006). Dominance and the evolution of sexual dimorphism in human voice pith. Evolution and Human Behavior, 27, 283 - 296.


Manipulation
Manipulation Dominance and the evolution of sexual dimorphism in human voice pitch.

  • The recordings of participants

    • Lowered version

    • Original version

    • Higher version

Pu, D.A., Gaulin S.J., & Verdolini, K. (2006). Dominance and the evolution of sexual dimorphism in human voice pith. Evolution and Human Behavior, 27, 283 - 296.


Results
Results Dominance and the evolution of sexual dimorphism in human voice pitch.

Adapted from Puts et. al.

Pu, D.A., Gaulin S.J., & Verdolini, K. (2006). Dominance and the evolution of sexual dimorphism in human voice pith. Evolution and Human Behavior, 27, 283 - 296.


Conclusions
Conclusions Dominance and the evolution of sexual dimorphism in human voice pitch.

  • Intra sexual selection had an influence on evolution of the dimorphic voice pitch

  • Only the male voice pitch evolved (female baseline)

    • Lead to increased mating success

    • Made males better competitors for resources

Pu, D.A., Gaulin S.J., & Verdolini, K. (2006). Dominance and the evolution of sexual dimorphism in human voice pith. Evolution and Human Behavior, 27, 283 - 296.


  • Strong points Dominance and the evolution of sexual dimorphism in human voice pitch.

    • The extra information about voice pitch and the equation

    • voice pitch might be nervousness and relaxation rather than a dominance display

    • We found the manipulation of voice pitch with the computer software very interesting

  • Weak Points

    • The measure of mating success is likely to be biased

    • The study might have benefitted from having a female control group

    • We questioned the ratings of dominance. The scale might have been to sensitive (0-100)

Pu, D.A., Gaulin S.J., & Verdolini, K. (2006). Dominance and the evolution of sexual dimorphism in human voice pith. Evolution and Human Behavior, 27, 283 - 296.


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