It was the purpose of those conducting this investigation to discover if there were some practical and valuable grouping of psychological tests for college students which would give an index of relative mental ability. Our problem was to find if any group of tests showed correlation with the office grades in college subjects, granting the assumption that grades in college subjects are an indication of the mental ability of the student. The tests were carried out individually on all the students in Reed College, over a space of three years. Three classes received the tests during the sophomore year, and one during the freshman year.A group of experiments was selected for trial which were standard tests for measuring the processes of memory, association, attention, suggestion, imagination and judgment. Both rote memory and logical memory were tested. For the former a series of 42 cards was used for auditory-visualarticulatory presentation, and the experiment was performed and evaluated according to Whipple's 'Manual of Mental and Physical Tests,' pp. 364-66. The logical memory test consisted of the reading twice to the subject of a story of ten logically related incidents, after which he was to write this story in the form in which it was read. As it contained 166 words, it is evident that it could be remembered only by meaning, that is by the dependence of one point on the preceding.Complete success in the logical memory meant 10 points. Failure in one complete section of the ten meant a deduction of 1. Failure in one half a section meant a deduction of 0.5. Attention was measured by three different tests. For studying the range of visual attention, cardboards were prepared 211

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