Effects of Speech Rate on Personality Perception

Abstract

Using the voices of six subjects, representing various social and educational backgrounds, fifty-four synthetic voices were generated by computer. Each normal voice was both increased and decreased in rate by 121/2, 25, 371/2, and 50 per cent. Judges evaluated the fifty-four voices using a series of adjectives representing two major personality factors of " competence " and " benevolence ". Several statistical analyses were performed, and it was found that the competence factor was much more sensitive to rate manipulations than was the benevolence factor. Ratings of competence were found to increase as rate increases and decrease as rate decreases, in a linear fashion. Benevolence had an inverted U-relationship with speech rate; the highest benevolence ratings occurred with normal speech rate.

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