Published online by Cambridge University Press: 01 January 2025
This paper reports on the third of a series of four experiments using similar concepts and methods for objective personality measurement, and overlapping test batteries. One hundred students were measured with 115 tests. The scores were correlated and factored by a re-iterated multiple group centroid method. The 17 factors thus obtained were rotated toward a clear simple structure. The relation of the rotated factors to earlier ones is indicated, but no extensive interpretation is attempted.
The Institute for Personality and Ability Testing, 1608 Coronado Drive, Champaign, Illinois, is planning to publish these tests and their instruction booklets, during 1954, beginning with the tests of highest factor loading.
It will be noted that some communalities are in excess of the corresponding estimates of reliability. There is, of course, a margin of error in both estimates. In addition, communality estimates including the contribution of chance loaxtings on a number of factors should be expected to exceed reliability estimates based on the assumption of a single common factor.