1. Updated: Hanushek (1986) added to Cluster 3 (Class Size); Cluster 1 effect size corrected to d ≈ 0.10–0.15.
    → Read Cluster 3 →
Updated: Hanushek (1986) added to Cluster 3 (Class Size); Cluster 1 effect size corrected to d ≈ 0.10–0.15.Read Cluster 3 → →
All Clusters
8
CLUSTER 8

Social-Emotional Learning and Non-Cognitive Skills

d = 0.27 (universal SEL, Durlak et al. 2011)
Evidence strength:
Last reviewed May 10, 2026
KEY FINDING

Universal SEL programs reliably improve achievement and behavior. Targeted psychological interventions (grit, growth mindset) show weak effects at scale.

Overview

The role of non-cognitive skills — such as grit, growth mindset, self-control, and social-emotional competencies — in driving student success has garnered substantial attention, though the causal evidence for interventions targeting these skills is heterogeneous. The literature is characterized by a sharp divergence between the strong evidence for universal SEL programs and the weak evidence for targeted psychological interventions.

Universal SEL Programs

Durlak et al. (2011) conducted a highly influential meta-analysis of 213 school-based universal SEL programs, showing that they improved academic achievement by d = 0.27, reduced conduct problems, and improved social skills. These programs, which focus on concrete behavioral skills, classroom climate, and explicit prosocial routines, show consistent positive effects across diverse populations and settings. The CASEL framework emphasizes five core competencies: self-awareness, self-management, social awareness, relationship skills, and responsible decision-making.

Targeted Psychological Interventions: Grit and Growth Mindset

Targeted psychological interventions aimed at shifting specific internal beliefs have faced intense scrutiny. Credé, Tynan, and Harms (2017) conducted a meta-analysis of the grit literature, concluding that grit is largely redundant with conscientiousness and that its incremental validity for predicting performance is near zero. Sisk et al. (2018) found that growth mindset interventions produce very small overall effects (d = 0.08). Yeager et al. (2019) demonstrated in a national experiment that growth mindset interventions only improve achievement in schools where peer norms support challenge-seeking, suggesting that social context is a critical moderator.

POLICY IMPLICATION

The enthusiasm for 'grit' rapidly outpaced the evidence base. The appropriate policy response is to invest in comprehensive, evidence-based SEL programs that build concrete skills and positive classroom climates, rather than in brief, targeted mindset interventions that promise transformative results from minimal inputs. Building concrete behavioral routines is effective; brief psychological 'nudges' to alter internal mindsets are unlikely to produce sustained academic gains at scale.

Key Papers

  • (2017)
    Much Ado About Grit: A Meta-Analytic Synthesis of the Grit Literature
  • Durlak et al. (2011)
    The Impact of Enhancing Students' Social and Emotional Learning: A Meta-Analysis of School-Based Universal Interventions
  • Heckman & Stixrud & Urzua (2006)
    The Effects of Cognitive and Noncognitive Abilities on Labor Market Outcomes and Social Behavior
  • Sisk et al. (2018)
    To What Extent and Under Which Circumstances Are Growth Mind-Sets Important to Academic Achievement? Two Meta-Analyses
  • Yeager et al. (2019)
    A National Experiment Reveals Where a Growth Mindset Improves Achievement