Figure 3
From: Cognitive differences between orang-utan species: a test of the cultural intelligence hypothesis
Proportion correctly solved tubes in tube trap task.
Sumatran individuals achieved significantly more correct tubes than Borneans (LM: NSumatra = 14, NBorneo = 8, Pspecies = 0.011, βspecies = 0.127 ± 0.045, Page = 0.123, Psex = 0.737).
