Individual differences in object manipulation in a colony of tufted capuchins

Individual differences in object manipulation were studied in 42 captive tufted capuchins (Cebus apella) in seven social groups. Object manipulation was recorded in the homecage with familiar and novel objects. Juveniles were more manipulative than adults, and no overall sex differences were observed in object manipulation. Baseline manipulation of familiar objects in the homecage was significantly correlated with manipulation of novel objects when they were introduced. Along with a wide range of interest in objects, there was considerable stability in individual differences across situations, such that most animals could be classified as to their ''style'' of object use. The influence of those manipulative styles on whether or not individuals can learn to use tools remains to be explored. (C) 1996 Academic Press Limited