Long-delay spatial discrimination learning in monkeys (Cebus apella)

Discrimination Reversal Learning in Capuchin Monkeys (Cebus apella)

Spatial Constraints and Regulatory Functions in Monkeys' ( Cebus apella) Search

By means of an apparatus featuring a set of suspended baited containers, search abilities of 4 capuchin monkeys (Cebus apeUa) were evaluated. The experiment featured different spatial configurations of the search space. Results showed that monkeys exhaustively searched 9 containers spatially distributed as a 3 × 3 matrix, a cross, a line, or a circle. Search efficiency was higher when the searc...

Face recognition in capuchin monkeys (Cebus apella).

Primates live in complex social groups that necessitate recognition of the individuals with whom they interact. In humans, faces provide a visual means by which to gain information such as identity, allowing us to distinguish between both familiar and unfamiliar individuals. The current study used a computerized oddity task to investigate whether a New World primate, Cebus apella, can discrimin...

Implicit and explicit category learning by capuchin monkeys (Cebus apella).

Current theories of human categorization differentiate an explicit, rule-based system of category learning from an implicit system that slowly associates regions of perceptual space with response outputs. The researchers extended this theoretical differentiation to the category learning of New World primates. Four capuchins (Cebus apella) learned categories of circular sine-wave gratings that v...

Visual list memory in capuchin monkeys (Cebus apella).

Memory of 3 capuchin monkeys, Cebus apella, was tested with lists of 4 travel-slide pictures and different retention intervals. They touched different areas of a video monitor to indicate whether a test picture was in a list. At short retention intervals (0 s, 1 s, 2 s), memory was good for the last list items (recency effect). At a 10-s retention interval, memory improved for 1st list items (p...