A somato-sensory discrimination was presented to 23 nursery school children. The stimuli to be discriminated were not visible to the children but Ss were required to select the positive stimulus on the basis of touch. Choice of the positive stimulus was rewarded by a charm. 15 Ss reached the criterion of learning and were given an additional 16 trials. Ss hand movements on these 16 additional trials revealed that Ss touched the positive stimulus and remained at this stimulus without referral to the negative stimulus. The results were interpreted as supporting a uniprocess conceptualization of discrimination where the process is that of excitation.
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References
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EttlingerG.Discrimination learning theory: Excitatory vs. inhibitory tendencies in monkeys. Quart. J. exp. Psychol., 1960, 12, 41–44.
