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Peer reviewedMayer, John D. – Perceptual and Motor Skills, 1983
Kelly's formula estimates sampling variance of correlation corrected for attenuation by using split-half reliabilities. In some cases, coefficient alpha estimate of reliability is preferable. A simulation study suggests a variation of Kelly's formula can be used appropriately with coefficient alpha. Kelly's formula is modified to accept…
Descriptors: Correlation, Measurement Techniques, Reliability, Sampling
Peer reviewedSilverstein, A. B. – Perceptual and Motor Skills, 1983
Formulas for estimating the validity of random short forms were applied to the standardization data for the Wechsler Adult Intelligence Scale-Revised, the Minnesota Multiphasic Personality Inventory, and the Marlowe-Crowne Social Desirability Scale. These formulas demonstrated how much "better than random" the best short forms of these…
Descriptors: Comparative Analysis, Intelligence Tests, Measures (Individuals), Test Format
Peer reviewedMeredith, Gerald M. – Perceptual and Motor Skills, 1981
The number of rating items preferred by students on an instructional evaluation instrument was investigated. The median length preferred was 25 items. (Author/GK)
Descriptors: College Students, Higher Education, Rating Scales, Student Attitudes
