Education

Education economics and policy research.

The Heritability of Intelligence: What Twin and Adoption Studies Show

nonacademicresearch.org Editorial · May 10, 2026 · submitted by nonacademicresearch.org Editorial · nar:iirsia2gp6cwmapy52

Twin and adoption studies consistently find that genetic factors explain a substantial portion of variation in measured cognitive ability — heritability estimates of 50–80% in adults. This finding is frequently misunderstood: heritability describes variation within a population, not the proportion of intelligence determined by genes versus environment, and does not imply that group differences in test scores are genetic in origin. Environmental interventions can and do substantially improve cognitive outcomes. The heritability of intelligence is real, important, and consistently misapplied in public debates about inequality and education policy.

Early Childhood Education: What the Evidence Shows About Long-Term Effects

nonacademicresearch.org Editorial · May 10, 2026 · submitted by nonacademicresearch.org Editorial · nar:z7ggznhyduxc72xfve

Early childhood education programs — including Head Start in the US and Perry Preschool, Abecedarian, and similar programs — have been studied for their long-term effects on cognitive development, educational attainment, employment, and social outcomes. The evidence shows that high-quality early childhood programs have lasting positive effects on life outcomes, particularly for disadvantaged children, but that effects on IQ test scores typically fade by early elementary school — the 'fade-out' phenomenon. Long-term benefits manifest in school completion, criminal behavior, employment, and health outcomes rather than sustained IQ gains.

Financial Education: Does It Change Behavior?

nonacademicresearch.org Editorial · May 10, 2026 · submitted by nonacademicresearch.org Editorial · nar:06c85pe6ju27fcna6x

Financial education programs are widely promoted as a solution to poor financial decision-making — excessive debt, low savings, inadequate retirement preparation. The evidence on whether financial education actually changes financial behavior is largely pessimistic. Meta-analyses find that financial education interventions have small effects on knowledge and even smaller effects on actual financial behavior. The effects that do exist decay rapidly. More targeted, just-in-time financial guidance — delivered at the moment of relevant financial decisions — appears more effective than generic financial literacy education.

Screen Time and Children's Development: What the Research Actually Shows

nonacademicresearch.org Editorial · May 10, 2026 · submitted by nonacademicresearch.org Editorial · nar:tfeh8z9dchgii8948z

Concern about children's screen time is widespread among parents and policymakers, but the research evidence is more nuanced than public discourse suggests. The effect of screen time on children's wellbeing and development depends heavily on content type, context, and what screen time replaces. Educational content produces measurable learning gains; passive entertainment has small negative effects on sleep and attention; social media use in early adolescence shows stronger associations with mental health problems, particularly for girls. Universal screen time limits based on hours alone are not well-supported by evidence.

Neuroplasticity and Learning: What the Evidence Shows About the Adaptive Brain

nonacademicresearch.org Editorial · May 9, 2026 · submitted by nonacademicresearch.org Editorial · nar:7mhldckl7aer3heqat

Neuroplasticity — the brain's capacity to reorganize by forming new neural connections throughout life — was a controversial idea through most of the 20th century, when the dominant view held that the adult brain was essentially fixed. The past three decades of neuroscience research have established that significant structural and functional brain reorganization occurs in response to learning, experience, and injury throughout the lifespan. This finding has direct implications for education, rehabilitation, and our understanding of cognitive aging.

The Returns to Education: What Does a Degree Actually Buy?

nonacademicresearch.org Editorial · May 9, 2026 · submitted by nonacademicresearch.org Editorial · nar:t2yq7vx43z4ss63gda

The economic return to completing a college degree — measured as the wage premium relative to workers with only a high school diploma — has been one of the most studied questions in labor economics for 50 years. The central finding is robust: each additional year of schooling is associated with approximately 8–10% higher wages in the United States, with similar magnitudes in other high-income countries. But the aggregate figure conceals substantial variation: returns differ by field of study, institution type, and individual characteristics.