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Admissions exams, gifted programs, national score reports and school testing policy, explained without the spin from either side.
A WISC-V report does not hand back one score. It hands back six — and the headline Full Scale IQ is built from a specific seven of ten subtests, not an average of all five indexes.
When a large Florida district began testing every second grader instead of waiting for a teacher's nomination, the population it identified as gifted changed sharply — not because more students became capable, but because fewer of them had ever been tested at all.
The two tests American schools use most to screen for gifted programmes print their results on scales that differ by one point of standard deviation. At the level where cutoffs are set, that moves the same printed number by most of a percentile.
Verbal subtests measure ability through vocabulary and cultural knowledge acquired in one language, so a test taken in a second language can understate ability on those subtests specifically — not on the test as a whole.
National reading results have dropped again, and around forty per cent of American fourth-graders are now below the NAEP Basic level. That is a fact about an achievement test, and achievement tests are built to show exactly the movement an IQ score is built to hide.
A Finnish cohort followed 260 children from primary school into adolescence and measured cognition at the end. The children who had spent more time on screens did not do worse. On the processing measures they did slightly better.
Two people can perform identically on two different online tests and walk away with scores twenty points apart. The scale, the comparison group and the margin of error are what separate an assessment from a quiz.
The exam is shorter, taken on a screen, and the second half of each section changes difficulty based on how you did in the first. Raw right-answer counts stopped mapping onto scores the way they used to.
An IQ figure is meaningless without the scale it was measured on and the range around it. Every story here reports all three, or says plainly that the source did not.
Each story ends with the studies, datasets and documents it draws on, named and attributed, so you can go and read them yourself.
Spotted an error? Write to corrections@iqmetrics.org. Corrections are made on the story and noted at the bottom of it — never quietly.
Our IIF-certified assessment reports your score with its scale, percentile and confidence range — and a breakdown of the cognitive domains behind it.
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