Blog
Notes on IQ scores, cognitive test formats, and how to prepare for admission testing.
What Is Standard Deviation? The Number Behind Every IQ Score
Standard deviation, explained plainly: what it measures, why IQ tests are built around one, and how it turns a raw score into a percentile.
Read moreDoes IQ Measure Intelligence? What the Research Actually Shows
A deep dive into what IQ tests capture, how heritable intelligence really is, whether the brain evidence backs it up, and whether training or education can move the number.
Read moreHow IQ Scores Are Calculated
How a raw test score becomes a number like 100 or 130: norm groups, the bell curve, standard deviation, percentiles, and how WAIS, Stanford-Binet, and other major tests compare.
Read moreHow to Prepare for the Mensa Admission Test
What the Mensa admission test actually measures, which question types show up most, and how to practice without over-fitting to one test's specific items.
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