Development of script concordance test for assessment of clinical reasoning in nursing: Lessons learned regarding construct validity

Abstract

BackgroundThe script concordance test (SCT) has been shown to be an effective tool to assess the clinical reasoning skills of nursing students. Various nursing studies have demonstrated the construct validity of this test. However, studies on the barriers that may impede construct validity during the development process are limited. ObjectiveThis evaluation describes the barriers to the development of SCT for Bachelor's nursing students and the lessons learned regarding construct validity. MethodsWe conducted a descriptive evaluation of the SCT development and a validation process was performed. The evaluation was based on written comments during the assessment (N = 327), a Student's Perspective Questionnaire (N = 100), and student feedback during three live review sessions (N = 27). ResultsDespite consideration of the guidelines during SCT development, we encountered three main barriers that may impede construct validity. We undertook the necessary efforts to recruit an appropriate expert panel. We overestimated the experts' and students' understanding of the SCT methodology. Additionally, four potential causes of invalid item construction were identified. These possible causes were ‘questionable intervention, hypothesis, or investigation’, ‘blurred data in new information’, ‘regression to the middle’, and ‘misinterpretation of the midpoint’. ConclusionThe three lessons learned are as follows: 1) The recruitment of an appropriate expert panel must not be underestimated. Besides clinical expertise, experts need training in SCT methodology, including awareness of possible pitfalls; 2) SCT training is a prerequisite for SCT as an assessment; and 3) student feedback may offer a deeper understanding of potential hidden script errors and causes for misinterpretation of SCT. Further studies are necessary to identify additional causes which may impede the construct validity of SCT in nursing education.