Stimulus attributes and training procedures in learning-set formation of rhesus and cebus monkeys.

Abstract

Assessed the importance of visual capabilities and training procedures in learning-set (LS) comparisons of species with 8 rhesus and 8 cebus monkeys. 2 levels of stimulus attributes, chromatic and achromatic stimuli, and 2 procedural levels, 6 trials/problem and an adjustable trials/problem procedure, were combined. The ranking of the species on rate of approach to a criterion based on Trial 2 performance differed according to the condition of LS training. Asymptotic performance (percentage correct responses on Trial 2) did not differ. Stimulus attributes and training procedures were significant factors in establishing LS (p < .005). Results are considered to be incompatible with the notion that LS performance leads to a consistent ordering of rhesus and cebus monkeys according to their phylogenetic development. (22 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved)