DavisR. T.Problem-solving behavior of monkeys as a function of work variables. J. comp. physiol. Psychol., 1956, 49, 499–506.
2.
DavisR. T.McDowellA. A., & ThorsonN.Four-trial object-quality discrimination learning by monkeys. Proc. So. Dak. Acad. Sci., 1953, 32, 132–142.
3.
HarlowH. F.Learning set and error factor theory. In KochS. (Ed.), Psychology: a study of a science.Vol. 2. New York: McGraw-Hill, 1959.
4.
HarlowH. F.HarlowM. K.RuepingR. R., & MasonW. A.Performance of infant rhesus monkeys on discrimination learning, delayed response, and discrimination learning set. J. comp. physiol. Psychol., 1960, 53, 113–121.
5.
LevineM.LevinsonB., & HarlowH. F.Trials per problem as a variable in the acquisition of discrimination learning set. J. comp. physiol. Psychol., 1959, 52, 396–398.
6.
WarrenJ. M., & HallJ. F.Discrimination of visual patterns as a function of motivation and frequency of reinforcement. J. genet. Psychol., 1956, 88, 143–151.