Further studies of the middleness concept with the chimpanzee

摘要: Summary In a previous experiment chimpanzee was trained to select the middle of 3, 5, 7, 9, 11, 13, 15 and 17 objects when were 1·25 in. diameter pipe plugs placed adjacent one another on WGTA. present study, retention for task tested then subject object 9 11 stimulus they asymmetrically arranged separated by from 1 6 positions. The results showed 50 per cent saving score in that with an increase number distance between groups objects, there corresponding difficulty discriminate objects. However, as difference increased (a 9-object problem 4–5 arrangement would have 8–1 we difference, 7) discrimination became easier.