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Career Development1
Classroom Observation…1
Observation1
Reliability1
Statistical Analysis1
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Test Reliability1
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Journal of Educational…1
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Rowley, Glenn1
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The Relationship of Reliability in Classroom Research to the Amount of Observation: An Extension of the Spearman-Brown Formula.
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Rowley, Glenn – Journal of Educational Measurement, 1978
The reliabilities of various observational measures were determined, and the influence of both the number and the length of the observation periods on reliability was examined, both separately and jointly. A single simplifying assumption leads to a variant of the Spearman-Brown formula, which may have wider application. (Author/CTM)
Descriptors: Career Development, Classroom Observation Techniques, Observation, Reliability