Measuring integrity and fidelity of program implementation: Validating an instrument designed for school renewal.

In this study, we attempted to explore with instrumentation that could provide a good means to measure integrity and fidelity of program implementation. The instrument, High Integrity and Fidelity Implementation for School Renewal, was created using a comprehensive review of the literature to provide insights into the implementation integrity and fidelity when principals renew a school. Data from 1097 teachers were used to examine the instrument for construct validity by means of factorial validity and convergent validity. We used confirmatory factor analysis to compared five factorial structures of the instrument, resulting in the identification of a four-factor structure (coming from the comprehensive review of the literature) as the best fitting structure to the data. Strong convergent validity of the instrument was confirmed by correlating the instrument with a psychometrically established instrument measuring a similar construct. Finally, McDonald's Omega indicated strong internal consistency of the instrument in our reliability analysis.