title: Mirror-image matching and mental rotation problem solving by baboons (Papio papio): unilateral input enhances performance.
abstract: Three experiments, using a matching-to-sample procedure, were conducted to examine hemispheric specialization in mirror-image discrimination and mental rotation in baboons (Papio papio). In Experiment 1, no significant difference was found in discrimination of mirror-image and asymmetric pattern stimuli. In Experiment 2, orientation discrimination was assessed within the left (LVF) and right (RVF) visual half-fields. An RVF advantage was found in accuracy for asymmetric patterns, whereas an LVF advantage was found for discrimination of mirror-image stimuli. No significant relation was found between angular disparity of the stimuli and response time. Experiment 3 examined the effect of bilateral visual input on accuracy and response time. Significantly lower accuracy and longer response times were found for bilateral compared with unilateral visual input.
authors.affiliation: Centre National de la Recherche Scientifique Laboratoire de Neurosciences Cognitives, Marseille, France.
authors.forename: W D
authors.initials: WD
authors.lastname: Hopkins
authors.forename: J
authors.initials: J
authors.lastname: Fagot
authors.forename: J
authors.initials: J
authors.lastname: Vauclair
mesh_terms: D000818:Animals; D001288:Attention; D004292:Dominance, Cerebral; D007092:Imagination; D011939:Mental Recall; D009949:Orientation; D010215:Papio / Q000523:psychology*; D010364:Pattern Recognition, Visual; D011340:Problem Solving; D011597:Psychomotor Performance; D011930:Reaction Time