Lozano et al. (2008). Effect of the number of response categories on the reliability and validity of rating scales

Lozano, L., García-Cueto, E., & Muñiz, J. (2008). Effect of the Number of Response Categories on the Reliability and Validity of Rating Scales. Methodology. Notes: p.6: Our results permit the conclusion that, considering criteria of reliability and validity, the minimum number of response categories for items with Likert-type format should be al least of four. As regards the ideal number, the data indicate that from seven categories onwards the gains are scarce from a psychometric point of view, suggesting the use of between four and seven....

December 14, 2015 · 1 min