Abstract
The need for having tests calibrated on a quality scale arises from difficulties encountered in the classification of borderline personnel into predetermined categories. The proposed scale was studied experimentally from a succession of differently spaced criterion groups. As thus studied, its characteristics indicated that it was admirably suited for the purpose contemplated.
The practicability of the scale was verified through actual use. A new test, called the Biographical Case History, was constructed, calibrated by reference to two contrasting criterion groups, and used successfully for measurement and classification purposes. The nature of further applications that may be made was illustrated.
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