Abstract
Nineteen out of 20 ferrets were shown to exhibit spontaneous alternation in a Y maze thus establishing the existence of the phenomenon in another species. In Experiment 2, 16 out of a further 20 ferrets were seen to enter 1st the arm of a Y maze changed to brightness opposite to its brightness when they had been exposed to but barred from entering 1 black and 1 white arm for 5 min. on a previous trial. The results were interpreted as supporting Dember''s "exploration of novelty" explanation.

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