Role Development, Implementation and Evaluation of Nurse Practitioners

A mixed methods design is used to enrich the gathered data, resulting in an integrated approach for addressing the complexity of this study. This method creates the opportunity to triangulate and integrate quantitative and qualitative data resulting in a complete and nuanced understanding of complex phenomena . Several strategies are used to enhance the internal validity of the quantitative part. At first, all questionnaires that will be used will be validated and selected after thorough consideration of several researchers with experience in mixed methods implementation research. Secondly, using a wide range of outcome indicators, increases the ability to distinguish confounding from independent variables. Thirdly, if possible a matched controlled group will be used to compare outcomes. Internal validity of qualitative data will be ensured in the stage of data collection by involving researchers who did not participate in the PAR-process to conduct the interviews and focus group interviews. In the stage of data analysis, internal validity of the qualitative data will be enhanced by systematically organizing and coding data and triangulation (data and researcher). Analysis and comparison of the four different settings will reinforce the external validity and transferability of the findings.