Intelligence Research & Cognitive Science Blog

How does IQ change from childhood to old age? Explore age-specific IQ data tables, the diverging trajectories of fluid and crystallized intelligence, the F...

Complete guide to Raven's Progressive Matrices - the gold-standard nonverbal IQ test. Covers history, SPM/CPM/APM versions, scoring norms, proven practice...

A practical guide to understanding IQ percentiles and score ranges. Learn what makes a 'good' IQ score, how percentiles translate raw numbers into meaningf...

IQ tests measure a narrow slice of cognitive ability, but human intelligence is far broader. Explore the g-factor, multiple intelligences, emotional intell...

A clear, step-by-step explanation of how IQ test scores are calculated. Learn what standard deviation and percentiles mean, how raw answers become standard...

Neuroscience research shows IQ is not fixed at birth. Learn which brain training methods have real evidence behind them, how neuroplasticity supports intel...

Research-based guide to cognitive aging. Which abilities decline, which improve, how to distinguish normal aging from dementia, and evidence-backed ways to stay sharp.

Howard Gardner's theory of multiple intelligences explained. The eight types, scientific evidence, controversies, and practical applications for education and careers.

Evidence-based learning techniques from cognitive science. Spaced repetition, active recall, and interleaving explained - plus why highlighting and rereading fail.

How dyslexia relates to IQ. Research shows dyslexia is neurological, independent of intelligence, and often paired with spatial reasoning and creative strengths.

What research really says about IQ and leadership. The surprising finding that very high intelligence can actually reduce leadership effectiveness.

Which foods actually improve brain performance? Research-based guide to the Mediterranean diet, MIND diet, omega-3s, berries, and debunked brain food myths.