The effect of treatment integrity on student achievement a quasi-experimental study

Date of Award


Degree Name

Ed.S. in School Psychology


School of Education and Health Sciences


Advisor: Sawyer Hunley


Previous research suggests that repeated reading interventions improve student reading rate (Strong, Wehby, Falk, & Lane, 2004; Welsch, 2006; Yurick, 2006). However, little research exists in the literature regarding the degree to which the intervention must be implemented in order to obtain positive student outcomes. The current study used a repeated reading intervention at varying levels of treatment integrity with 16 second grade students identified as struggling readers in a quasi-experimental design. The repeated reading intervention was applied to three groups of students at either: 100%, 80%, or 60% integrity, and the results were compared to students in a control group. Three out of four students receiving the intervention at 100% integrity demonstrated positive g-index scores. Only half of students in the 80% and 60% groups, and none of the students in the control group achieved positive g-index scores. Potential implications, suggestions for future research, and limitations are included.


Reading Remedial teaching Methodology, Developmental reading Methodology, Response to intervention (Learning disabled children)

Rights Statement

Copyright 2010, author