From Construct to Validated Scale: A Practical Guide Scale Development with jamovi

From Construct to Validated Scale is a practical, step-by-step guide for researchers, graduate students, educators, and thesis or dissertation writers who want to develop and validate measurement scales with greater clarity and confidence.Rather than treating scale development as a series of statistical procedures, this book shows you how to move from a clearly defined construct to a defensible set of items, and then to evidence supporting the interpretation and use of the resulting scores. Using a continuous worked example and jamovi-based analyses, it explains not only what to do, but also why each decision matters.Inside, you will learn how to define and delimit a construct, generate and refine items, conduct expert content validation and cognitive pretesting, examine item performance, perform exploratory factor analysis, confirm a measurement model through CFA, and evaluate reliability, convergent evidence, discriminant evidence, and score interpretation.Special attention is given to the decisions researchers often find difficult: choosing appropriate thresholds, deciding when to retain or remove items, interpreting factor loadings and model-fit indices, avoiding mechanical use of cutoffs, and reporting results in a clear and publication-ready manner.Written in an accessible and conversational style, this book is designed to help you move beyond simply creating a questionnaire toward developing a measurement instrument that is theoretically grounded, empirically supported, and responsibly interpreted.Ideal for: - Graduate and postgraduate researchers- Thesis and dissertation writers- Faculty members and research advisers- Educational and social science researchers- Researchers using jamovi for EFA, CFA, reliability, and validity analysis