Table 1. Mean proportion of correct responses of the baboons and macaques in each task (and Scale) of the PCTB.
macaques | baboons | |||||||||
Tasks | Trials | n | M (SD) | 95% CI | Ind | n | M (SD) | 95% CI | Ind | Chance |
Space | .54 (.06) | [.51,.58] | .69 (.03) | [.65, .73] | ||||||
Spatial Mem | 6 | 13 | .68 (.22) | [.55, .81] | 7 | 5 | .83 (.12) | [.69, .98] | 4 | .33 |
Object Perm | 18 | 13 | .65 (.08) | [.60, .70] | 13 | 5 | .71 (.06) | [.64, .79] | 5 | .33 |
Rotation | 18 | 13 | .46 (.09) | [.41, .51] | 5 | 5 | .49 (.19) | [.25, .73] | 1 | .33 |
Transposition | 18 | 13 | .39 (.07) | [.35, .44] | 0 | 5 | .73 (.17) | [.52, .95] | 4 | .33 |
Quantity | .67 (.08) | [.62, .72] | .66 (.06) | [.59, .73] | ||||||
Rel Numbers | 16 | 13 | .70 (.13) | [.62, .78] | 4 | 5 | .69 (.15) | [.51, .87] | 1 | .50 |
Add Numbers | 14 | 12 | .64 (.11) | [.57, .71] | 2 | 5 | .63 (.03) | [.59, .67] | 0 | .50 |
Causality | .46 (.05) | [.43, .50] | .46 (.04) | [.41, .51] | ||||||
Noise | 12 | 13 | .56 (.07) | [.51, .60] | 0 | 5 | .50 (.08) | [.40, .60] | 0 | .50 |
Shape | 12 | 13 | .66 (.17) | [.56, .76] | 2 | 5 | .70 (.13) | [.54, .86] | 2 | .50 |
Tool Use | 1 | 13 | 0 | 0 | 5 | 0 | 0 | .00 | ||
Tool Prop | 30 | 13 | .64 (.08) | [.59, .68] | 4 | 5 | .63 (.12) | [.48, .77] | 2 | .50 |
Social learning | 3 | 10 | 0 | 0 | 5 | .07 (.15) | [−.12, .25] | 0 | .00 a | |
Communication | .53 (.13) | [.45, .61] | .69 (.21) | [.42, .95] | ||||||
Comprehension | 18 | 13 | .66 (.17) | [.56, .76] | 4 | 5 | .71(.09) | [.60, .82] | 4 | .50 |
Pointing Cups | 8 | 13 | .69 (.15) | [.60, .78] | 3 | 5 | .90 (.16) | [.70, 1.10] | 4 | .50 |
Attention State | 4 | 13 | .23 (.26) | [.07, .39] | 0 | 5 | .45 (.51) | [−.19, 1.09] | 2 | .00 |
Theory of Mind | .59 (.10) | [.53, .65] | .57 (.13) | [.41, .74] | ||||||
Gaze following | 9 | 13 | .57 (.17) | [.47, .67] | 12 | 5 | .33 (.21) | [.08, .60] | 3 | .10a |
Intention | 12 | 13 | .62 (.14) | [.53, .70] | 2 | 5 | .82 (.11) | [.68, .95] | 3 | .50 |
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;
results of the baseline conditions.