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Sources of Variation That Affect the Reliability of Reading Classroom Observation Measures. Instructional Research Laboratory Technical Series #R83004.
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Willson, Victor L.; And Others – 1982
Given the complexity of classroom reading observations, maintenance of measurement reliability is a concern to researchers. Sources of variation contributing to the unreliability of many measurements may be either (1) lasting and specific, (2) lasting and general, (3) temporary and specific, or (4) temporary and general. Lasting-specific sources…
Descriptors: Classroom Communication, Classroom Observation Techniques, Data Collection, Error of Measurement