Pointing by apes is near-ubiquitous in captivity, yet rare in their natural habitats. This has implications for understanding both the ontogeny and heritability of pointing, conceived as a behavioral phenotype. The data suggest that the cognitive capacity for manual deixis was possessed by the last common ancestor of humans and the great apes. In this review, nonverbal reference is distinguished from symbolic reference. An operational definition of intentional communication is delineated, citing published or forthcoming examples for each of the defining (...) criteria from studies of manual gestures in apes. Claims that chimpanzees do not point amongst themselves or do not gesture declaratively are refuted with published examples. Links between pointing and cognitive milestones in other domains relating means to ends are discussed. Finally, an evolutionary scenario of pointing as an adaptation to changes in hominid development is briefly sketched. (shrink)

Joint attention is the ability to intentionally co-orient towards a common focus. This ability develops in a protracted, mosaic fashion in humans. We review evidence of joint attention in humans and great apes, finding that great apes display every phenomenon described as joint attention in humans, although there is consid-erable variation among apes of different rearing histories. We conclude that there is little evidence for human species-unique cognitive adaptations in the non-verbal communication of humans in the first 18 months of (...) life. This conclusion is consistent with the Narrative Practice Hypothesis because the NPH posits training in folk psychological narratives as a basis for folk psychological competence. (shrink)