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A description is given of an experiment in which an attempt was made to show that audio-visual feedback is more effective in intonation learning than auditory feedback. The factors in the experiment were feedback mode and practice time. The results showed a significant effect of audio-visual feedback over auditory feedback, whereas practice time did not seem to be a major factor. Feedback modality was shown to influence learning behavior. -
Kees de Bot (Sat,) studied this question.