A Psychometric Analysis of the Primary Intervention Rating Scale

Social validity focuses on a program's goals, procedures, and outcome, which helps determine if an intervention is socially acceptable and valued. This study represents a conceptual replication of the investigation by Lane and colleagues (2009) regarding the psychometric properties of the Primary Intervention Rating Scale (PIRS), a teacher survey designed to measure social validity of positive behavior support. Lane and colleagues' results indicated the PIRS was a one-factor measure with strong reliability and structural validity. To substantiate these findings, we distributed an adapted version of the PIRS to teachers from a school district in the Mountain West region. We collected data from 153 elementary and middle school teachers and computed results with a series of statistical analyses including confirmatory factor analyses as well as Cronbach's alpha and Raykov's rho. We affirmed the findings of the PIRS as a one-factor measure with strong internal consistency and no significant differences in scores based on the school level. Study limitations and implications are addressed.