Normative data on Progressive Matrices (1947).

Further normative data on the progressive matrices.

“…For the older children, 2X2 color slides were made of each matrix of the test and projected upon a screen to groups ranging in size from 15 to 30. The group method of administration has been reported previously and found to be reliable with no significant differences between group and individual scores (1).…”

“…The normative data on the colored Progressive Matrices (1) suggest that clinicians should be cautious in the application of Raven's original norms, based on Dumfries, Scotland children (4), to American children. The data from the Rochester, Minnesota, children reported by Green and Ewert (1) were in some respects quite different from the Scottish data and led to the inference that there may have been a notable difference in the intelligence level of children in the Scottish and Minnesota schools, or that there was a difference in the socioeconomic levels of the pupils of the normative sample, or that unidentified factors were producing the difference.…”

The learning and transfer of double-classification skills: A replication and extension

“…The mean difference of 5.0 points between ET and C groups represents approximately 15-24 months of "normal growth" according to available norms (Green & Ewert, 1955;Jacobs &Vandeventer, 1968;Raven, 1963;Sperrazzo & Wilkins, 1958;Tuddenham & Freeman, 1958). Since this "growth" was produced in an hour or less of individualized instruction, it is important to consider both how the procedure that produced it was arrived at and what this finding implies about the trainability of intelligence.…”

An experimental group version for school children of the progressive matrices.

“…Differences between boys and girls in mean scores and in standard deviations for separate grade levels are inconsistent and very small 1 An extended report of this study may be obtained without charge from R. D. Tuddenham, Dept. of Psychology, University of California, Berkeley 4, Calif., or for a fee from the American Documentation Institute.…”