Some pictorial artifacts in studies of African children's pictorial depth perception.
D002657:Child Development; D003867:Depth Perception; D003906:Developing Countries; D004522:Educational Status; D005260:Female; D005556:Form Perception; D006801:Humans; D008297:Male; D009949:Orientation; D012424:Rural Population; D013636:Tanzania; D014505:Urban Population