Sameness-difference Judgments of Numerousness by Monkeys: Macaca mulatta and Macaca assamensis

منو

" Sameness-difference Judgments of Numerousness by Monkeys: Macaca mulatta and Macaca assamensis "
Lin, Guobin; Wang, Yanling; Yang, Hua

Document Type	:	AL
Record Number	:	935280
Doc. No	:	LA7zk0d273
Language of Document	:	English
Main Entry	:	Lin, Guobin; Wang, Yanling; Yang, Hua
Title & Author	:	Sameness-difference Judgments of Numerousness by Monkeys: Macaca mulatta and Macaca assamensis [Article]\ Lin, Guobin; Wang, Yanling; Yang, Hua
Title of Periodical	:	International Journal of Comparative Psychology
Volume/ Issue Number	:	3/4
Date	:	1990
Abstract	:	Three of four monkeys were trained successfully on a series of number-related judgment problems ending with ''same'' and ''different'' judgments involving pairs of numerousness discriminanda. The discriminanda were black ''dots'' drawn on cards and constructed using controls to preclude the use of cumulative area or brightness cues and to make specific pattern memorization unlikely. On the final task, all possible same and different pairs of discriminanda representing the numbers 2 through 6 were used, and three monkeys met criterion (two successive sessions of 80% or more correct) in 80, 160, and 200 trials, respectively. Discussion considered possible underlying processes to explain the numerousness judgments as well as the implications of the present work for Piaget's views on conservation of quantity.