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ERIC Number: ED233062
Record Type: Non-Journal
Publication Date: 1982
Pages: 14
Abstractor: N/A
Reference Count: N/A
A Note on the Incremental Validity of Aggregate Predictors.
Day, H. D.; Marshall, David
Three computer simulations were conducted to show that very high aggregate predictive validity coefficients can occur when the across-case variability in absolute score stability occurring in both the predictor and criterion matrices is quite small. In light of the increase in internal consistency reliability achieved by the method of aggregation and consequent increase in predictive validity, such high aggregate validity coefficients are expected. The particular value of the demonstrations reported here is that they show that in some applications of the method of aggregation, high aggregate validity coefficients can occur even though the actual variability in the predicted aggregate score is trivially small; in other words, little may be gained in the explanation of the variability in the criterion measure by predicting the aggregate criterion score since this predicted criterion score is so close to the overall mean of the criterion scores. The routine reporting of the standard deviation of the predicted aggregate score was recommended for all applications of the aggregation method in the study of personality. (PN)
Publication Type: Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A