Imprinting. The interaction of learned and innate behavior: IV. Generalization and emergent discrimination.

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Abstract
A group of 8 chicks was given imprinting sessions over the first 4 days of life. Following each session, generalization was studied by testing Ss with objects differing in shape and color from the training object. On the fifth day of life each S was tested with the training object and one strange object presented at the same time. The results indicated that no generalization decrement occurred on the first day. On the second day, and thereafter, a generalization decrement occurred; the relative amount of generalization stabilized as imprinting progressed. When Ss were tested with the training and strange objects a progressive selective responding occurred to the training object. This behavior was called "emergent discrimination." (see 34: 822.).

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