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If one listens to a meaningless syllable that is repeated over and over, he will hear it undergo a variety of changes. These changes are extremely systematic in character and can be described phonetically in terms of reorganizations of the phones constituting the syllable and changes in a restricted set of distinctive features. When a new syllable is presented to a subject after he has listened to a particular syllable that was repeated, he will misreport the new (test) syllable. His misperception of the test syllable is related to the changes occurring in the representation of the original repeated syllable just prior to the presentation of the test syllable.
Lackner et al. (Thu,) studied this question.