Abstract
The objective of the investigation was to ascertain the reliability and concurrent validity of a new omnibus mental ability test which has considerably more ceiling than do most group intelligence tests, and which is proposed for use either as a speed or power device, once the appropriate norms are established. When administered to 184 college students under untimed conditions, the test was found to have a split-half reliability coefficient of .84 and a KR-20 reliability coefficient of .85. Regarding validity, the test correlated significantly with grades assigned in the classes which participated in the study (.26) and also with cumulative grade point average based on all courses taken at the university (.40).
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