Intonation-contingent adaptation to speech

Contingent adaptation effects have previously been reported with vowel, amplitude, ear, and duration of formant transition. The present study presents evidence that adaptation to place of articulation can be made contingent on intonation contour, as defined by pitch changes occurring during the second half of the vowel portion of the stimuli. It is argued that the most satisfactory account of this effect is that adaptation has induced changes in response bias rather than fatigue of feature detectors.