Note on an Internal Consistency Estimate for Responses with Multiple Categories
In a recent publication, Wofford (1967) derived a short-cut formula for determining the internal consistency for tests with more than two categories of response. The purpose of this note is to compare the Wofford Formula 9 with the Ferguson Formula 10 from which it was derived. Five questionnaires developed by the author to assess managerial behavior were given to 136 Ss who described the behavior of their industrial supervisors. Each item of the questionnaires had 5 categories of response which were weighted from 0 to 4. Responses of the Ss formed a platykurtic distribution on each of the tests.