Intelligence Research & Cognitive Science Blog

The 120-year evolution of IQ testing from Alfred Binet's 1905 scale to contemporary computerized assessments, the controversies that shaped the field, and...

A careful examination of Howard Gardner's theory of multiple intelligences, its scientific reception, and the ways in which it has and has not held up over...

A comprehensive look at processing speed as a core cognitive ability, how it is measured, why it declines with age, and what the research shows about impro...

An evidence-based examination of fluid and crystallized intelligence, how they differ, how they develop across the lifespan, and what the research reveals...

An evidence-based examination of attention span claims, the research that contradicts popular headlines, and what the science actually reveals about human...

A research-backed review of working memory training techniques, which exercises produce measurable gains, and how to build routines that translate to real-...

A practical guide to the mnemonic systems used by world memory champions, the cognitive research behind them, and how to apply these techniques to real-wor...

IQ score ranges, percentile rankings, and what each score level means for education, career, and daily life. Complete guide to understanding IQ scores.

James Flynn discovered IQ scores rise 3 points per decade across nations. Explore the forgetting curve of intelligence norms, proposed causes, the Scandina...

A research-backed deep dive into working memory - how it works, how it is measured, why it predicts academic and professional success, and whether it can...

How everyday digital tools can serve as cognitive training. Evidence-based analysis of browser-based tools that challenge working memory and processing speed.

The surprising history of how studying animal cognition influenced the development of modern human intelligence testing methods.