Rasch/Guttman Scenario (RGS) Scales: A Methodological Framework.

Abstract

Rasch/Guttman Scenario (RGS) scales produce scores that map onto interpretable descriptions of individuals at different levels of hierarchically progressive constructs. The unique scenario item format provides actionable and rich content-relevant feedback about (a) respondent status, (b) intervention design, and (c) longitudinal change on a construct. This article presents a seven-step methodological framework for the development of RGS scales. We also reflect on plausible challenges that may arise in the applications of RGS scale development and propose future research directions for the methodology.