What the research actually says
Short, sourced answers to the questions people ask after a test. Every figure links to its study.
What is the average human reaction time? About 230 ms for a simple visual signal. The lab figure, the online figure, the effect of age, choice and device, and a full percentile table from 70,940 games. Why your reaction time is slower on a phone Touchscreens add 50 to 200 ms of latency, and phone users score slower on reaction tests. Where the delay comes from and how Headgame corrects for it. What changes your reaction time Your device, your age, your attention and practice all move your reaction time. What each factor does in the studies, and what is not proven. The Stroop effect, explained Why naming the ink of the word RED printed in blue is so hard. The 1935 experiment, why reading wins, and why it is a poor measure of one person. Can a chimpanzee beat you at memory? In 2007 a young chimpanzee named Ayumu beat humans on a brief numeral memory task. In 2009 trained humans matched him. What the studies show and do not show. Working memory, what it is and how it is measured Working memory holds a few items in mind while you use them. The magic number seven, the 1887 digit span, the classic tests and the effect of age. Schulte table benefits, what the research says Speed reading, peripheral vision, focus? We looked for studies on the Schulte table itself and found none. Here is what the research shows instead. Are online brain tests accurate? Some online brain tests are reliable once averaged, others are not even in a lab. Test retest reliability by task, the device effect and how to read your score. Can a one minute game measure your IQ or brain age? No. A reaction or memory game measures a performance on one task, not general intelligence. Why IQ needs a standard setting, and where brain age comes from.
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