Perception of shape from shading in chimpanzees ( Pan troglodytes ) and humans ( Homo sapiens )

1998 ◽  
Vol 1 (1) ◽  
pp. 25-35 ◽  
Author(s):  
Masaki Tomonaga
Keyword(s):  
Pan Troglodytes ◽  
Homo Sapiens ◽  
Shape From Shading

scholarly journals New indices to characterize drawing behavior in humans (Homo sapiens) and chimpanzees (Pan troglodytes)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Lison Martinet ◽  
Cédric Sueur ◽  
Satoshi Hirata ◽  
Jérôme Hosselet ◽  
Tetsuro Matsuzawa ◽  
...  
Keyword(s):  
Pan Troglodytes ◽  
Homo Sapiens ◽  
Ontogenetic Development ◽  
Evolutionary Origins ◽  
Spatial Measures ◽  
Development And Evolution ◽  
Cave Art ◽  
Drawing Skills

AbstractTechniques used in cave art suggest that drawing skills emerged long before the oldest known representative human productions (44,000 years bc). This study seeks to improve our knowledge of the evolutionary origins and the ontogenetic development of drawing behavior by studying drawings of humans (N = 178, 3- to 10-year-old children and adults) and chimpanzees (N = 5). Drawings were characterized with an innovative index based on spatial measures which provides the degree of efficiency for the lines that are drawn. Results showed that this index was lowest in chimpanzees, increased and reached its maximum between 5-year-old and 10-year-old children and decreased in adults, whose drawing efficiency was reduced by the addition of details. Drawings of chimpanzees are not random suggesting that their movements are constrained by cognitive or locomotor aspect and we cannot conclude to the absence of representativeness. We also used indices based on colors and time and asked children about what they drew. These indices can be considered relevant tools to improve our understanding of drawing development and evolution in hominids.

Aping humans: Age and sex effects in chimpanzee (Pan troglodytes) and human (Homo sapiens) personality.

2008 ◽  
Vol 122 (4) ◽  
pp. 418-427 ◽  
Author(s):  
James E. King ◽  
Alexander Weiss ◽  
Melissa M. Sisco
Keyword(s):  
Pan Troglodytes ◽  
Homo Sapiens ◽  
Sex Effects ◽  
Age And Sex
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