An academic paper summarizing studies on the effect of attitude interventions like those discussed in the OP: https://labs.la.utexas.edu/adrg/files/2013/12/REV

An academic paper summarizing studies on the effect of attitude interventions like those discussed in the OP: https://labs.la.utexas.edu/adrg/files/2013/12/REVIEW-OF-EDUCATIONAL-RESEARCH-2011-Yeager-267-301.pdf https://labs.la.utexas.edu/adrg/files/2013/12/REVIEW-OF-EDUC... Positive feelings of belonging and capability seem to be a surprisingly powerful form of race and class based privilege.