IQ Test

Na IQ-style test wey you go do by yourself for your browser. E cover five areas wey full intelligence tests dey cover too: reasoning, working memory, processing speed, visual-spatial thinking and word skills. E no be clinical or official IQ test, wey psychologist dey give face-to-face using norms from carefully selected sample. No use the result make decision about school, work or medical matter.

Online scores dey come out small higher too: people wey dem test without supervision score about one-fifth of one standard deviation higher pass people wey dem test for room with supervisor 3. And when person do am again, the score gain about one-third of one standard deviation just from practice 2, so your first try na the fairest one.

The reasoning puzzles come from research question bank wey dem publish. 2,561 young adults wey apply enter medical school for Germany try each puzzle, so we sabi how hard each one be and how well e dey separate people wey reason strong from people wey reason less well 1. We use your answers estimate where you fit stand inside that group, with likely range instead of one number.

That group score pass the general population, so we adjust the estimate make e fit the usual IQ scale (average 100), using education statistics. The adjustment sef na estimate, so the range wey you see include the uncertainty for am too. Dem go show scores below 70 and above 130 only as "below 70" or "above 130": short test no fit place them precisely.

For now, the other four parts show your raw score with "comparison coming". We go show number for IQ scale for one area only when we don get enough first tries to compare am fairly, and overall estimate only when every area get one. People under 16 go see their scores without comparison: the research groups older pass them.

• Reasoning. Pattern puzzles: 3 × 3 grid wey the last square miss. Instead of choosing from small number of answers, you go build the missing square from 20 parts, so guess no go help. Up to 90 seconds for each puzzle. Two practice puzzles first.
• Working memory. Number go flash for screen; type am back, then later type am backward. E go add one digit each time you get am correct, like the classic digit span 4.
• Processing speed. Use key match symbols to digits, do as many as you fit for short quick test. Try the symbol digit test by itself too.
• Visual-spatial. The shape wey turn na the same shape, or na mirror image? E base on classic experiment 5.
• Verbal. Na our own word questions: words wey mean the same thing, pairs of words and the odd one out. Everyday English, no trivia.

Some questions na new ones wey we dey test for future versions. Dem no count for your score.

The reasoning puzzles come from Open Matrices Item Bank by Marco Koch, Frank M. Spinath, Samuel Greiff and Nicolas Becker 1, and anybody fit use am free under the GNU General Public License, version 3. We pick them from the published question data. Na Helibrain write all the other questions.