IQ Test

This is an IQ-style test ye tak yersel, in yer browser. It covers five airts that full intelligence tests cover an aw: reasoning, workin memory, processin speed, visual-spatial thinkin and verbal skills. It isnae a clinical or official IQ test, which is gien in person by a psychologist wi norms fae a thochtfully chosen sample. Dinna uise the result for schuil, wark or medical decisions.

Online scores tend tae be a wee bit higher an aw: folk tested wi nae supervision score aboot a fifth o a standard deviation higher than folk tested in a room wi an invigilator 3. And a retake gains aboot a third o a standard deviation through practice alane 2, sae yer first try is the fairer yin.

The reasoning puzzles come fae a published research item bank. Each puzzle wis tried by 2,561 young adults applyin tae medical schuil in Germany, sae we ken hou hard ilk yin is and hou weel it sorts stronger frae weaker reasoners 1. Fa the answers ye gie, we estimate whaur ye wad staun in that group, wi a likely range insteid o ae nummer.

That group scores abuin the general population, sae we shift the estimate ontae the usual IQ scale (average 100) wi an adjustment based on education statistics. The adjustment itsel is an estimate, sae the range ye see taks in its uncertainty an aw. Scores ahint 70 and abuin 130 are shown juist as "below 70" or "above 130": a short test cannae place them precisely.

The ither fower pairts show yer raw score for noo, wi "comparison coming". We only show a nummer on the IQ scale for an airt ance we hae eneuch first tries tae compare it fairly, and an overall estimate only ance ilk airt has yin. Folk under 16 see their scores wi nae comparison: the research groups were aulder.

• Reasoning. Pattern puzzles: a 3 × 3 grid wi the last square missin. Instaed o pickin fae a wheen answers, ye big the missin square fae 20 pairts, sae guessin disnae help. Up tae 90 seconds for ilk puzzle. Twa practice puzzles first.
• Workin memory. A nummer flashes up; type it back, then later in reverse order. It grows by ae digit ilk time ye get it richt, like the classic digit span 4.
• Processin speed. Match symbols tae nummers wi a key, as mony as ye can in a short sprint. Try the symbol digit test on its ain an aw.
• Visual-spatial. Is the turned shape the same, or its mirror image? Based on a classic experiment 5.
• Verbal. Oor ain wird questions: wirds wi the same meanin, wird pairs and the ane that disnae belang. Everyday English, nae trivia.

A wheen questions are new yin we’re tryin oot for future versions. They dinnae count towards yer score.

The reasoning puzzles are fae the Open Matrices Item Bank by Marco Koch, Frank M. Spinath, Samuel Greiff and Nicolas Becker 1, free tae uise under the GNU General Public License, version 3. We tak them fae the published item data. Aw ither questions were written for Helibrain.