Psychological mechanisms in math skillsInhibition, mental set shifting, and memory updating are related to math skills in preschool children. These meta-analytic findings from a research project led by the Luxembourg Centre for Educational Testing and the University of Oslo were published in the Psychological Bulletin. Would you follow the squirrel? Imagine you-re sitting in your first-grade math class while there is an orange squirrel jumping from branch to branch just outside the classroom window.