Argument-Based Approach to Validity: Developing a Living Document and Incorporating Preregistration

I propose two practical advances to the argument-based approach to validity: developing a living document and incorporating preregistration. First, I present a potential structure for the living document that includes an up-to-date summary of the validity argument. As the validation process may span across multiple studies, the living document allows future users of the instrument to access the entire validity argument in one place. Second, I describe how preregistration can be incorporated in the argument-based approach. Specifically, I distinguish between two types of preregistration: preregistration of the argument and preregistration of validation studies. Preregistration of the argument is a single preregistration that is specified for the entire validation process. Here, the developer specifies interpretations, uses, and claims before collecting validity evidence. Preregistration of a validation study refers to preregistering a single validation study that aims to evaluate a set of claims. Here, the developer describes study components (e.g., research design, data collection, data analysis, etc.), before collecting data. Both preregistration types have the potential to reduce the risk of bias (e.g., hindsight and confirmation biases), as well as to allow others to evaluate the risk of bias and, hence, calibrate confidence, in the developer's evaluation of the validity argument.