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From: vikram
Date: 10/10/00
Time: 5:22:15 PM
Remote Name: 150.216.147.121
We have always found it difficult to use DAF with people who have predominantly silent blocks. The probable reason being that there is no feedback and our latest research suggests that some form of feedback is required to keep the system going. We typically ask the person to use a vowel /a/ and then initiate speech.