Visual observing behavior in the squirrel monkey

Ten squirrel monkeys were tested to determine whether visual observing behavior could be measured using a technique developed for rhesus monkeys. The Ss engaged in visual observation of a set of projected color slides of other squirrel monkeys to an extent comparable with visual observation by rhesus monkeys. Significant differences in both mean cumulative viewing time and mean frequency of visual observing were found for the different visual incentive conditions used. Previous reports of a low level of visual attention by squirrel monkeys were not confirmed.