Mean proportion of correct responses of the baboons and macaques in each task (and Scale) of the PCTB.

Note: Significant deviations from chance level are in boldface (α = .05). Performance on the scale level was not compared to chance as this varies between tasks. Trials = Number of trials performed in each task; n = Number of tested individuals; Ind = Number of individuals performing above chance level; CI = confidence interval;aresults of the baseline conditions.