ERIC Number: ED030148
Record Type: RIE
Publication Date: 1968-Nov
Reference Count: 0
Differential Weighting: A Survey of Methods and Empirical Studies.
Stanley, Julian C.; Wang, Marilyn D.
The literature on a priori and empirical weighting of test items and test-item options is reviewed. While multiple regression is the best known technique for deriving fixed empirical weights for component variables (such as tests and test items), other methods allow one to derive weights which equalize the effective weights of the component variables (their individual contributions to the variance of the composite). Fixed weighting is most effective, in general, when there are few variables in the composite, and when these variables are not highly correlated. Variable weighting methods are those in which there is no nominal weight, constant over subjects, applied to a single item or response option. Of most interest are variable response-weighting methods such as those recently suggested by de Finetti (1965) and others. To be effective, such weighting methods require that the subject be able to maximize his expected score only if he reports his subjective probabilities honestly. Variable response-weighting methods, perhaps in conjunction with fixed response-weighting methods, show promise for increasing the reliability and validity of test scores. (Author/CJ)
Publication Type: N/A
Education Level: N/A
Sponsor: College Entrance Examination Board, New York, NY.
Authoring Institution: Johns Hopkins Univ., Baltimore, MD. Center for the Study of Social Organization of Schools.