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Haberman, Shelby J. – ETS Research Report Series, 2008
In educational testing, subscores may be provided based on a portion of the items from a larger test. One consideration in evaluation of such subscores is their ability to predict a criterion score. Two limitations on prediction exist. The first, which is well known, is that the coefficient of determination for linear prediction of the criterion…
Descriptors: Scores, Validity, Educational Testing, Correlation
Boyd, Donald; Grossman, Pamela; Lankford, Hamilton; Loeb, Susanna; Wyckoff, James – National Center for Analysis of Longitudinal Data in Education Research, 2008
Value-added models in education research allow researchers to explore how a wide variety of policies and measured school inputs affect the academic performance of students. Researchers typically quantify the impacts of such interventions in terms of "effect sizes", i.e., the estimated effect of a one standard deviation change in the…
Descriptors: Credentials, Teacher Effectiveness, Models, Teacher Qualifications
Sammon, Susan F. – 1988
A study investigated whether a positive correlation existed between scores obtained by incoming freshman on the recently developed Degrees of Reading Power Test (DRP) and the required Reading Comprehension subtest of the New Jersey College Basic Skills Placement Test (NJCBSPT). The subjects, 217 William Paterson College freshman enrolled in a…
Descriptors: Comparative Analysis, Comparative Testing, Correlation, Educational Testing
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Wiliam, Dylan – Review of Research in Education, 2010
The idea that validity should be considered a property of inferences, rather than of assessments, has developed slowly over the past century. In early writings about the validity of educational assessments, validity was defined as a property of an assessment. The most common definition was that an assessment was valid to the extent that it…
Descriptors: Educational Assessment, Validity, Inferences, Construct Validity