Figure 7
From: Cognitive differences between orang-utan species: a test of the cultural intelligence hypothesis
Reversal learning task.
Proportion of lids opened of wrong colour corrected for total amount of lids touched in the reversal learning task. Sumatran subjects opened less wrong coloured lids than Bornean subjects, (LM: NSumatra = 16, NBorneo = 8, Pspecies = 0.011, βspecies = −0.092 ± 0.033, Page = 0.899, Psex = 0.475).
