. Author manuscript; available in PMC: 2012 May 1.

Published in final edited form as: J Am Acad Child Adolesc Psychiatry. 2011 Feb 25;50(5):508–518. doi: 10.1016/j.jaac.2011.01.009

Table 1.

Participant characteristics

Subjects
Species	Group	N	Age (years +/− standard deviation)	% male
Chimpanzee	Site 1	11	22.6 +/− 12.0	36.4
Chimpanzee	Site 2	7	20.3 +/− 0.5	14.3
Chimpanzee	Site 3	11	18.9 +/− 12.8	27.3
Human	Typical	10	10.6 +/− 1.2	90
Human	ASD	10	10.5 +/− 1.4	90
Raters
Site	Roles	N	Time at site (years)
1	Caretakers, researcher	5	0.25 –5
2	Caretakers, research assistants	3	5–15
3	Zoological manager, caretakers	5	1–8

Note: ASD = Autism Spectrum Disorder (human subjects).