The scaling method of successive intervals was applied to 9-point rating data based on judgments of frequency of occurrence and on judgments of frequency of endorsement for all items in the booklet form of the MMPI, obtained from 111 college students, divided randomly into groups of 55 and 56 for their respective sets of judgments. Judged frequency of occurrence and judged frequency of endorsement scale values and discriminal dispersions for these items are reported. Evidence was obtained for their stability and certain applications noted and discussed.
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