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The Microsoft Reaction Card, developed by Microsoft in 2002 by Joey Benedek and Trish Miner, is a method used to check the emotional response and desirability of a design or product. This method is commonly used in the field of software design .
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In 2001, psychologist Ian J. Deary published the first large-scale study of intelligence and reaction time in a representative population sample across a range of ages, finding a correlation between psychometric intelligence and simple reaction time of –0.31 and four-choice reaction time of –0.49.
Given n equally probable choices, the average reaction time T required to choose among the choices is approximately: T = b ⋅ log 2 ( n + 1 ) {\displaystyle T=b\cdot \log _{2}(n+1)} where b is a constant that can be determined empirically by fitting a line to measured data.
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To measure reaction time (RT), a response mechanism is placed in front of the observer, usually a computer keyboard which is pressed upon detection of a target. Following a set inter-trial interval, usually between 2500 and 5000 ms, the entire paradigm is repeated for a set number of trials predetermined by the experimenter.
Eye movement time 230 ms 70–700 ms Decay half-life of visual image storage 200 ms 90–1000 ms Visual Capacity 17 letters 7–17 letters Decay half-life of auditory storage 1500 ms 900–3500 ms Auditory Capacity 5 letters 4.4–6.2 letters Perceptual processor cycle time 100 ms 50–200 ms Cognitive processor cycle time 70 ms 25–170 ms