ASA 128th Meeting - Austin, Texas - 1994 Nov 28 .. Dec 02

5pSP26. Lie detection based on phonatory processes.

Dean A. Pollina

Douglas A. Vakoch

Lee H. Wurm

Dept. of Psychol., State Univ. of New York at Stony Brook, Stony Brook, NY 11794-2500

Deception has been shown to be associated with changes in the fundamental frequency (F0) of vocalizations. For example, during attempted deception, F0 typically increases [P. Ekman, W. V. Friesen, and K. R. Scherer, Semiotica 16, 23--27 (1976); L. A. Streeter, R. M. Kraus, V. Geller, C. Olson, and W. Apple, J. Pers. Soc. Psychol. 35, 345--350 (1977)]. The current study examines changes in F0 for the identical utterances at two points in time: prior to establishing any belief about the statement, and after having a belief. By analyzing the same phrase at baseline and after the belief manipulation, more precise measurements corresponding to belief can be made than in previous studies.