Comparative Reliability of the Dogmatism Scale with 2 and 6 Scale Points

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Abstract
Previous research has shown that the variance in Rokeach's Dogmatism Scale is primarily associated with the direction of the response (agree vs disagree) resulting in a high correlation between the original 6-point weighted scoring and a simple count of the number of agree responses. These findings suggest that the Dogmatism Scale could be cast into a 2-point (agree-disagree) format. A 2-point Dogmatism Scale, with instructions to Ss to agree or disagree with each statement, and Rokeach's original 6-point scale were given in a test-retest situation to introductory psychology students. The results indicate that the 2-point scale is as reliable as the original 6-point scale and that the two scales are highly correlated. The 2-point scale offers the additional bonus of convenience and simplicity in administration and scoring.

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