Studies in item analysis: I. The effect of two methods of item validation on test reliability

Abstract

Flanagan's correlation method of item analysis was compared with Lawshe's D-value nomograph method in selecting test items from 300 elementary psychology examination questions. More reliable 20-item tests were selected by the Flanagan method, although it did not select shorter tests of higher reliability than the total test, while the D-method appeared superior in selecting tests of 80 or 100 items and produced a 100-item test of greater reliability than the total test. (PsycInfo Database Record (c) 2025 APA, all rights reserved)