Categorization of alphanumeric characters by baboons (papio papio) : within and between class stimulus discrimination

Vauclair, J. & Fagot, J. (1996). Categorization of alphanumeric characters by baboons (Papio papio) : Within and between class stimulus discrimination. Current Psychology of Cognition, 15, 449-462

Abstract – Using a video task requiring the manipulation of a joystick. we explored how baboons categorize alphanumeric characters displayed in various typefaces. Two baboons were trained in a symbolic matching,to-sample task with 21 different fonts of the characters B and 3 as sample forms, and colored squares as comparison forms. After training, there was a
positive transfer of performance ro novel fonts (Experiment 1). This transfer relied on the use of categorical procedures, because an identity matching-to-sample task showed accurate discrimination between exemplars’belonging to the same category (ExperimentZ)