One measure to measure them all? Commentary on "Ten steps toward a better personality science"

Leising and colleagues (2021) proposed ten steps to improve personality research. We agree with most of these steps and even more with the desired goals but disagree with the proposition to use exactly one measure for one construct. Keeping the same goals in mind, we suggest an alternative solution, based on open data and open materials. An online repository that contains items and data, additional information about the scale (e.g., mode of collection), and information about the sample (e.g., age, culture), would (1) allow detecting jingle-jangle-fallacies, (2) the development of new and useful measures, (3) provide the opportunity to develop equivalent measures based on different items, and (4) could, eventually, still culminate in one measure for one construct. Ideally, each scale used would, in the long run, be identified by an unambiguous identifier that, when submitted to our suggested repository, could recreate the scale, and provide additional, relevant psychometric information.