Correlation of a modified form of Raven's progressive matrices (1938) with the Wechsler adult intelligence scale.

Abstract

"The reliability, item difficulty, and correlation with the WAIS of a modified (30 item) form of Progressive Matrices (1938) was investigated. The following findings are reported. (1) The Kuder-Richardson reliability coefficient for the modified version of Matrices is .864 (N =82). (2) Correlation of modified Matrics with the WAIS Performance Scale score is .705; with the Verbal Scale score, .584; and with the Full Scale score, .721....(3) A severe shortcoming of modified Matrices was its low ceiling....".