„Achievement motivation is positively related to performance at school and to life satisfaction. On average across OECD countries, students in the top quarter of the index of achievement motivation score 37 points higher in science and reported 0.7 point higher life satisfaction (on a scale from 0 to 10) than students in the bottom quarter of the index.“
OECD (Hrsg.), „PISA 2015. Students’ Well-Being“ (2017), S. 94