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By: Agata Janiszewska, Samantha Godfrey, and Jessica Marquez

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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  1. 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

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. 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.

  7. 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.

  8. 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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