“…The available evidence paints a different picture of the quality of the SCAMIN preschool/kindergarten form, which was administered in the spring of kindergarten. Thus, Davis, Sellers, and Johnston (1988) analyzed the form's questions using factor analysis and found that they could recover the motivation and self-concept subscales only after disregarding some of the questions, which casts doubt on its construct validity. Moreover, Online Appendix Table A.1 shows that kindergarten motivation scores do not predict any of the measures of educational success studied in the paper, indicating that it has very low (or indeed no) criterion validity.…”