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Perception of Pitch Contours in Scrambled Speech
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Description: The experiment follows up on results from one that compared pitch direction discrimination in speech to nonspeech. We showed that identifying pitch direction as rising, falling, or flat was significantly more difficult in the nonspeech condition, even though the pitch information in both signals was identical. The current experiment tests whether this effect is due to the greater complexity of the speech signal compared to nonspeech, or whether it is because human speech requires additional processing that other signals do not.