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Journal of Positive Behavior Interventions
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Preliminary Validation of the Implementation Phases Inventory for Assessing Fidelity of Schoolwide Positive Behavior Supports

Catherine P. Bradshaw

John Hopkins Bloomberg School of Public Health

Katrina Debnam

John Hopkins Bloomberg School of Public Health

Christine W. Koth

John Hopkins Bloomberg School of Public Health

Philip Leaf

John Hopkins Bloomberg School of Public Health

Schoolwide positive behavioral interventions and supports (SWPBIS) are becoming increasingly popular with schools across the country to help create safer learning environments for students. An important aspect of SWPBIS is the ongoing monitoring and evaluation of implementation fidelity. Although a few measures have been created to assess the degree to which schools are implementing the key aspects of SWPBIS, there remains a need for a tool to categorize a school's overall phase of implementation and document the schools' progression toward sustainability of SWPBIS. The present study examines the reliability and validity of the Implementation Phases Inventory (IPI), a new measure of SWPBIS implementation fidelity. The findings indicate that the IPI is an internally consistent measure with adequate test—retest reliability, interrater reliability, and concurrent validity. These findings provide preliminary evidence that supports the use of the IPI to assess phase of SWPBIS implementation.

Key Words: positive behavior supports • fidelity • implementation • evaluation • measurement

This version was published on July 1, 2009

Journal of Positive Behavior Interventions, Vol. 11, No. 3, 145-160 (2009)
DOI: 10.1177/1098300708319126
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