Learn about IQ testing, brain training, and cognitive science
Mensa IQ Requirements: What Score Qualifies and How to Apply Mensa has exactly one membership requirement, and it is not an IQ number. It is a percentile: a score at or above the 98th percentile on an...
The Stanford-Binet Intelligence Scale: History and Modern Use The Stanford-Binet Intelligence Scale is the oldest IQ test still in professional use. It began as a practical screening tool built in Par...
Raven's Progressive Matrices: The Non-Verbal IQ Test Raven's Progressive Matrices is the best-known non-verbal reasoning test in psychology. It presents an incomplete grid of abstract shapes and asks ...
The WAIS-IV: Structure, Subtests, and What It Measures The Wechsler Adult Intelligence Scale, Fourth Edition — the WAIS-IV — is the most widely used individually administered intelligence test for adu...
Giftedness Explained: What High Cognitive Ability Looks Like Giftedness is one of the most used and least agreed-upon terms in the whole of psychology. To a school district it may be an administrative...
Twice-Exceptional (2E): High Ability Alongside Learning Differences Twice-exceptional — often shortened to 2E — describes individuals who show both high cognitive ability in one or more areas and one ...
Is IQ Genetic or Environmental? What Twin Studies Reveal The question of whether IQ is "in the genes" or shaped by upbringing is one of the most studied — and most misunderstood — topics in behavioral...
IQ and Income: What Longitudinal Studies Have Found Does a higher IQ lead to higher earnings? It is a question that surfaces in popular media, policy debates, and personal curiosity alike. Longitudina...
IQ and Career Outcomes: The Correlations and Their Limits The idea that IQ predicts career success is one of the most cited — and most misunderstood — claims in psychology. The research is real: cogni...
IQ and Academic Performance: What the Research Shows IQ and academic performance are related — but exactly how strongly, through what mechanisms, and with what limitations is a more nuanced story than...
Adult IQ Testing: What to Expect After Age 18 Most people associate IQ testing with childhood — school psychologists, gifted programs, early diagnosis. But adults take IQ tests too, and the experience...
IQ Tests for Children: Age-Appropriate Assessment Explained IQ testing for children is not a single event or a single number — it is a carefully structured process that looks very different depending ...
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