This is untimed educational practice for one applied skill. It is not a clinical, diagnostic, employment, or professionally recognized assessment, it does not produce a score or credential, and for the judgement and safety families it is not a substitute for your employer's own policies, training, or legal duties.
| Item | Choice | Answer |
|---|---|---|
| reaction-time-applied-s01-q01 | C | Press right |
| reaction-time-applied-s01-q02 | A | Make no response |
| reaction-time-applied-s01-q03 | D | Make no response: the tone is a stop signal that overrides the go signal |
| reaction-time-applied-s01-q04 | B | A false alarm: responding when the rule required withholding, because the practised response fires before it can be inhibited |
| reaction-time-applied-s01-q05 | A | Slower and less accurate responses for several trials, because the old mapping still competes with the new one |
| reaction-time-applied-s02-q01 | B | Choice reaction time is longer, and it grows further as the number of alternatives increases |
| reaction-time-applied-s02-q02 | D | Detection and transmission, then response selection, then the movement itself, each stage contributes a meaningful share |
| reaction-time-applied-s02-q03 | C | It shortens the reaction time by allowing preparation, though the benefit fades if the interval is too long or too variable |
| reaction-time-applied-s02-q04 | A | Responses to sound are typically a little faster |
| reaction-time-applied-s02-q05 | B | It is an anticipation error: the response was not caused by the stimulus, and well-designed tests discard or penalise such trials |
| reaction-time-applied-s03-q01 | D | Speed can be exchanged for accuracy in either direction, so a reaction time is uninterpretable without its error rate |
| reaction-time-applied-s03-q02 | C | A: B's 40 ms advantage is bought with nine times the error rate, which is a poor exchange on almost any task |
| reaction-time-applied-s03-q03 | A | The fast incorrect response: it commits you to the wrong action and then costs a correction on top |
| reaction-time-applied-s03-q04 | B | It raises the average and, more consequentially, the variability: the occasional very long lapse is what causes incidents |
| reaction-time-applied-s03-q05 | C | The median together with a measure of spread and the error rate, since a few very long trials distort the mean |
| reaction-time-applied-s04-q01 | A | Because the measured value includes device, browser, and display latency, which vary between machines, so scores are not comparable across setups |
| reaction-time-applied-s04-q02 | B | Hold the device, browser, input method, and conditions constant, and compare medians across many trials |
| reaction-time-applied-s04-q03 | D | It can add up to about 17 ms of variable delay before the stimulus is even visible. A significant share of the differences usually being measured |
| reaction-time-applied-s04-q04 | C | Very little on its own: it is one narrow component, and most real tasks depend far more on decision quality, knowledge, and sustained attention |
| reaction-time-applied-s04-q05 | D | Scores improve noticeably over the first few sessions, so a first attempt is not a stable estimate of anything |