title: Auditory--visual cross-modal perception of communicative stimuli in tufted capuchin monkeys (Cebus apella).
abstract: Research on cross-modal performance in nonhuman primates is limited to a small number of sensory modalities and testing methods. To broaden the scope of this research, the authors tested capuchin monkeys (Cebus apella) for a seldom-studied cross-modal capacity in nonhuman primates, auditory-visual recognition. Monkeys were simultaneously played 2 video recordings of a face producing different vocalizations and a sound recording of 1 of the vocalizations. Stimulus sets varied from naturally occurring conspecific vocalizations to experimentally controlled human speech stimuli. The authors found that monkeys preferred to view face recordings that matched presented vocal stimuli. Their preference did not differ significantly across stimulus species or other stimulus features. However, the reliability of the latter set of results may have been limited by sample size. From these results, the authors concluded that capuchin monkeys exhibit auditory-visual cross-modal perception of conspecific vocalizations.
authors.affiliation: Alpha Genesis, Inc., Yemassee, SC, USA. taevans79@yahoo.com
authors.forename: Theodore Avery
authors.initials: TA
authors.lastname: Evans
authors.forename: Sue
authors.initials: S
authors.lastname: Howell
authors.forename: Gregory Charles
authors.initials: GC
authors.lastname: Westergaard
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods; D000818:Animals; D001307:Auditory Perception / Q000502:physiology*; D001522:Behavior, Animal; D002428:Cebus / Q000502:physiology*; D004192:Discrimination, Psychological / Q000502:physiology*; D005260:Female; D008297:Male; D010775:Photic Stimulation / Q000379:methods; D021641:Recognition, Psychology / Q000502:physiology*; D013997:Time Factors; D014796:Visual Perception / Q000502:physiology*