Figure 4
From: Cognitive differences between orang-utan species: a test of the cultural intelligence hypothesis
Latencies to taste novel (a,b) and familiar food (c,d). Sumatran subjects took longer to taste novel food than Bornean subjects and an interaction effect of age and species was found within the Sumatran subjects: (LM: NSumatra = 14, NBorneo = 12, Pspecies < 0.001, βspecies = 2.123 ± 0.496, Psex = 0.990, Page = 0.781, Pinteraction: age/species = 0.001, βinteraction: age/species = −0.069 ± 0.020). The familiar food condition showed neither a species nor an age effect (LM: NSumatra = 15, NBorneo = 9, Pspecies = 0.340, Psex = 0.500, Page = 0.257).
