Continuous vs Discrete Semantic Differential Rating Scales

Abstract

This study examined the equivalence of information obtained from a five-category semantic differential rating scale and a continuous scale of the same length. Data from 176 university students showed that equivalent information was obtained for comparisons of scale means, variances, and shapes of the response distributions. Because continuous rating scales can provide the same aggregate information yet provide greater discrimination at an individual level of measurement, continuous semantic differential rating scales have an advantage in studies where individual differences are important.