Learning Set Formation in Thick-Tailed Bush Babies (Galago crassicaudatus) and Comparison of Learning Ability among Four Species

Abstract

Following the studies on Nycticebus coucang, Lemur catta and Tupaia glis, the Visual Discrimination Learning Set was tested on the nocturnal prosimian thick-tailed bush babies (Galago crassicaudatus). Their performance occupied a position between that of Lemur and Tupaia, and was almost the same as that of Nycticebus. The hypothesis behavior analysis was made on the performance of the 4 species. The species differences in performance showed a strong relationship with the degree of neocortex development and eco-ethological characteristics.