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From: Jean Sawyer
Date: 20 Oct 2011
Time: 12:47:47 -0500
Remote Name: 138.87.142.51
One of the reasons you find a wide range of children reported to recover is that different methodologies were used in various studies. For example, if the sample of children are older, researchers will have missed younger children who recover, thus lowering the percentages. If researchers are relying on parental report, rather than looking at children's speech directly, the data may not be reliable. The Illinois studies under the direction of Ehud Yairi and Nicki Ambrose, followed over 100 young children near the onset of stuttering for several years, collecting speech samples and reports from parents every few months. These studies found a high rate of recovery, near 80%, and were very thorough. Another study in Denmark by Mansson found similarly high levels of recovery. I worked in Yairi's lab, and I know that this was a well-funded, well designed study.