Influence of the task on hand preference: individual differences among gorillas (Gorilla gorilla gorilla) |
| |
Authors: | Pouydebat E Reghem E Gorce P Bels V |
| |
Institution: | Handibio EA 4322, Université du Sud Toulon-Var, La Garde, France. pouydeba@univ-tln.fr |
| |
Abstract: | The degree of task complexity and bimanual complementarity have been proposed as factors affecting lateralization strength in humans. However, a large number of studies have demonstrated group-level lateral hand bias for different manual activities in numerous non-human primate species. However, no study has tested the effects that a variety of tasks may have in inducing differences in hand preference. Here, we aim to test if 3 adult gorillas exhibited a greater hand preference bias performing 4 tasks of varying complexity: grasping small versus large foods, proto-tool use task and tool use task involving greater visuospatial requirements. We found that (1) the complexity of the task does not necessarily induce a right-handed bias and (2) a subject can be right-handed for a complex task and left-handed for another one. These results, complemented by many publications on hand preference in non-human primates, reveal a great variability in hand preference, which makes it very difficult to deduce any details of hominin handedness with artefacts. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|