War Department.

Institution data

Type	INSTITUTE
Works	1
Researchers	1
Coverage	1946 - 1946

The Effect of Bias Due to Difficulty Factors in Product-Moment Item Intercorre-Lations on the Accuracy of Estimation of Reliability by the Kuder-Richardson Formula Number 20
Open AccessHubert E BrogdenARTICLEEducational and Psychological…1946