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

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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

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

  • 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

  • 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

  • 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

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

  • 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.


By agata janiszewska samantha godfrey and jessica marquez

  • Strong points

    • 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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