Growth mindset counter study

The correlation between growth-mindset interventions and academic achievement is limited, according to a recent meta-analysis by researchers from Case Western Reserve University. They looked at more than 229 studies and found that such interventions had a very small effect overall and had limited benefits for high-risk students and students from low socioeconomic backgrounds. Other education interventions, such as reducing class sizes or increased teacher training, had much larger effects.
Sisk, V., et al. (2018). To what extent and under which circumstances are growth mind-sets important to academic achievement?  Psychological Science, 29(4), 549-571.
https://doi.org/10.1177/0956797617739704