Psychology

Behavioral science and psychological research.

Does Psychotherapy Work? What 50 Years of Research Shows

nonacademicresearch.org Editorial · May 10, 2026 · submitted by nonacademicresearch.org Editorial · nar:6iwmml9e7kxqm9ihoq

Psychotherapy is among the most rigorously evaluated treatments in medicine — and the evidence is largely positive. Cognitive behavioral therapy (CBT) has the most evidence across the widest range of conditions. The 'Dodo Bird' verdict — the controversial claim that all bona fide therapies produce equivalent outcomes — remains debated but has shaped research priorities. Therapy works, but not equally for everyone, and access barriers remain the largest obstacle to its benefits being realized.

Video Games and Wellbeing: Separating Moral Panic from Evidence

nonacademicresearch.org Editorial · May 10, 2026 · submitted by nonacademicresearch.org Editorial · nar:6qakbf1gm8ocqqqthc

Despite decades of concern about video games' effects on aggression, mental health, and academic performance, the evidence shows effects are small, context-dependent, and frequently overstated in public discourse. Some gaming — particularly action gaming in moderate amounts — may improve certain cognitive abilities. Problem gaming (gaming disorder) affects a small minority of players. The blanket framing of video games as harmful is not supported by the best available evidence.

Loneliness and Physical Health: Is Social Isolation as Harmful as Smoking?

nonacademicresearch.org Editorial · May 10, 2026 · submitted by nonacademicresearch.org Editorial · nar:c9nw28e3hlaajis291

A growing body of epidemiological research has established that loneliness and social isolation are associated with substantially elevated risks of mortality, cardiovascular disease, cognitive decline, and compromised immune function. Meta-analyses have found that the mortality risk associated with social isolation is comparable in magnitude to smoking 15 cigarettes per day — a striking comparison that has entered popular discussion of the 'loneliness epidemic.' Causal mechanisms include disrupted sleep, elevated cortisol, increased inflammation, and reduced engagement with health behaviors. The evidence supports treating social connection as a health-relevant factor, while the policy implications remain actively debated.

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.

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.

Antidepressants: What the Evidence Shows About Efficacy and the Serotonin Hypothesis

nonacademicresearch.org Editorial · May 10, 2026 · submitted by nonacademicresearch.org Editorial · nar:unx5bw4v261j6ft3ei

Antidepressants are among the most widely prescribed medications in the world, yet their efficacy and mechanism of action remain contested. The serotonin hypothesis — that depression is caused by low serotonin levels corrected by SSRIs — is not well-supported by current evidence. However, antidepressants do produce statistically significant and clinically meaningful symptom reductions for moderate-to-severe depression, though their effects for mild depression are modest and close to placebo. The science is more nuanced than both proponents and critics often acknowledge.

Online Misinformation: What the Evidence Shows About Spread and Effects

nonacademicresearch.org Editorial · May 9, 2026 · submitted by nonacademicresearch.org Editorial · nar:696w5ct9ayucxylb6n

Concern about the spread of false information online has prompted extensive empirical research over the past decade. A major MIT study found that false news spread faster and wider on Twitter than true news, driven by novelty and emotional content rather than bots. However, subsequent research has found that consumption of political misinformation is concentrated among a small fraction of users, and that the relationship between misinformation exposure and belief or behavior change is weaker than often assumed. Correcting misconceptions is possible but requires sustained, credible sources.

Social Media and Mental Health: What the Evidence Actually Shows

nonacademicresearch.org Editorial · May 9, 2026 · submitted by nonacademicresearch.org Editorial · nar:c1dkuupp6lq5fkqxy3

Public concern that social media use damages mental health — particularly among adolescents — has grown substantially since the mid-2010s. The empirical evidence is more mixed than public discourse suggests. While some longitudinal studies find associations between heavy social media use and depression or anxiety, effect sizes are typically small, causality is difficult to establish, and experimental studies have produced inconsistent results. Understanding what the evidence does and does not support is essential for sound policy.

Childhood Adversity and Adult Health: The Evidence for Long-Term Effects

nonacademicresearch.org Editorial · May 9, 2026 · submitted by nonacademicresearch.org Editorial · nar:ys3r8x0gonuwoadl0l

The Adverse Childhood Experiences (ACE) study, first published in 1998, found strong dose-response relationships between childhood maltreatment and neglect and adult rates of heart disease, cancer, mental illness, and substance use. Subsequent research has reinforced the finding that early adversity has lasting biological consequences, identifying mechanisms including epigenetic modification, HPA axis dysregulation, and chronic inflammation. The robustness of these effects across populations and the identification of biological pathways have made ACEs one of the most cited frameworks in public health.

Cognitive Biases in Real-World Decisions: How Robust Is the Evidence?

nonacademicresearch.org Editorial · May 9, 2026 · submitted by nonacademicresearch.org Editorial · nar:jtx6g8m3kled1cqval

Behavioral economics and cognitive psychology have documented dozens of systematic biases in human judgment and decision-making — anchoring, availability, representativeness, loss aversion, and many others. These findings, many originating in laboratory experiments by Kahneman and Tversky, have been widely applied in policy, design, and business. But the replication crisis has reached this literature too. Some classic findings have replicated reliably; others have not. This report reviews which biases are most robustly documented in real-world settings and which remain primarily laboratory phenomena.