Measuring Teacher Dispositions Toward Teaching Sustainable Systems: A Mixed Methods Approach for Instrument Development and Psychometric Testing

representations that are created by the researcher as a conceptualization of an unobservable variable using item scores. In essence construct validity is the perceived measure of the overall quality of the instrument, and its ability to measure the latent constructs presented. One method used to test the consistency of a measure’s construct and the proposed theoretical framework is through a confirmatory factor analysis (CFA). The CFA is designed to test the multi-dimensionality of theoretical constructs and is