The Reliability of Observational Data

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Abstract
Much attention has been directed recently toward the problem of measuring occurrences of stuttering with satisfactory levels of interjudge agreement. This paper reviews the prominent concepts of the stuttering event, arguing that they may be one cause of the stuttering measurement problem. The evidence that has led to concerns about the reliability of stuttering event measurements is also reviewed. Reliability and measurement issues that were discussed in the first paper of this series (Cordes, 1994) emerge as basic to the interpretation of much stuttering research, and it is argued that the stuttering measurement problem is not confined to research on stuttering judgments but actually permeates other important stuttering research areas. Some recent attempts to resolve the stuttering measurement problem are reviewed, and the implications of developing an improved measurement system for this disorder are discussed.

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