Here's my poster for MPIG 2013.
ABSTRACT:
Gestural communication is thought to be a precursor to the origin of human language. Since human language is lateralized between brain hemispheres, is there also a lateralization in gestural communication in nonhuman primates?
This preliminary study sought to elucidate whether the hamadryas baboon (
Papio hamadryas) troop at the Prospect Park Zoo in Brooklyn, New York exhibits hand preference in gestural communication. Two types of gestural communication were examined: hand slapping and muzzle wiping. An all occurrence sampling method was completed in 3 weeks with a total of 24 hours of observation and data collection. The Handedness Index (HI) for each individual (N=7) was calculated for both hand slapping and muzzle wiping.
This study revealed that most
P. hamadryas individuals at the Prospect Park Zoo exhibit a right hand preference for hand slapping, but exhibit no hand preference for muzzle wiping. These results are consistent with previous studies on another baboon species, olive baboons (
Papio anubis) (Vauclair et al., 2005; Meguerditchian & Vauclair, 2006; Meguerditchian & Vauclair, 2009). Results from this preliminary study can contribute to the study of nonhuman primate handedness, as well as the evolution of language.