GewirtzJ. L.BaerD. M.The effect of brief social deprivation on behavior for a social reinforcer. J. abnorm. soc. Psychol., 1958, 56, 49–56.
2.
HanlonC. C.Response variability in children as a function of age, pre-training, and incentive conditions. Unpublished master's thesis, Univer. of Texas, 1959.
3.
HodgdenL. H.Variability as a function of intelligence and incentive. Unpublished doctoral dissertation, Univer. of Texas, 1958.
4.
McCullersJ. C.The effects of verbal reinforcement in a probability learning situation. Unpublished master's thesis, Univer. of Texas, 1960.
5.
StevensonH. W.ZiglerE. F.Probability learning in children. J. exp. Psychol., 1958, 56, 185–192.