Key evidence an nummers
| Published task | Sample | Mean measurt latency |
|---|---|---|
| Simple visual reaction, Woods Experiment 1 | 1,469 adults, ages 18–65 | 231 ms |
| Visual choice reaction, Woods Experiment 1 | 1,466 adults, ages 18–65 | 550 ms |
| Choice task, age 18–24 group | 86 participants | 472 ms |
| Choice task, age 59–65 group | 246 participants | 590 ms |
The figures for the simple task are in its sample summary; the choice-task age groups an means are in Table 2. The studies share a research setting but uise different stimuli an task demands. Subtractin their grand means is descriptive arithmetic, no a pure measure o ae mental processin stage. Woods et al., 2015 Woods et al., 2015
Whit chynges whan a choice is addit?
In a simple task, the participant can get the same movement ready afore ilk signal. A choice task needs ye tae identify whit appeared an match it tae an action. Classic experiments bi Hick an Hyman link response time tae the information in the alternatives, includin the nummer an probabilities o the possible signals. Hick, 1952 Hyman, 1953
That’s why a body can respond quick tae a licht but need langer tae choose the richt move in a gemme. There’s nae contradiction: the tasks ask different questions. The laboratory choice task an aa controls whit alternatives are available, somethin a real-warld gemme or drivin situation cannae reduce tae ae universal reaction-time benchmark. Woods et al., 2015
Hou shuid age an sex be understood?
The age-group values abuin come fae a cross-sectional sample, no fae followin the same fowk for decades. They shaw the task’s context but cannae predict hou muckle ae person’s score will chyng ilka year. Nor dae they set age-specific browser percentiles or a fixed adjustment for sex. Thae wad need the same protocol an suitable norms. Woods et al., 2015 Woods et al., 2015
Whit affects it?
Scorin includes errors as weel as speed
Guessin quick can lower response time while increasin errors. A choice task maun therefore say whit counts as a richt response, a missed response or a premature response. Mean time fae richt responses cannae be understood withoot considerin whether accuracy chynged. The Woods choice study reports several outcomes, insteid o treatin latency as a hale account o performance. Woods et al., 2015
Extremely slow or fast responses, an hou missed trials are handled, can chyng the summary an aa. The method for dealin wi outliers is pairt o the score definition; twa websites wi different rules can gie different values for similar behaviour. Ratcliff, 1993
Why online results differ fae the table
Displays, input devices an browser systems add their ain delays an timing variation. Experimental comparisons shaw that fine-grained software timestamps dinnae get rid o thae differences. A phone choice task compared wi a moose-based simple task mixes response selection wi differences in equipment an movement. Anwyl-Irvine et al., 2020 Bridges et al., 2020
For a useful informal comparison, keep the equipment the same an read the instructions for baith tasks. Expect a task-specific difference, no treatin either nummer as a general speed rating. Reliability research warns an aa that a strang average task effect disnae automatically mak a person’s difference score a stable trait. Hedge et al., 2017
Practice micht mak the links atween stimuli an responses mair familiar. That can be real learnin o the task withoot showin a general improvement in decision-makin. The scientifically useful outcome is better performance on a clearly defined procedure, keepin its errors an conditions in view. Woods et al., 2015 Hick, 1952
Gie the related free test a try
Reaction time test
Start wi the reaction time test tae see a simple response task. If ye try a choice-based test an aa, sic as the Stroop test, compare its instructions an accuracy rules afore ye compare times. The difference is no a validated measure o yer intelligence or decision-makin ability.
Common questions
Which task is maist like gemmin?
Gemmes aften need choices, prediction an movement. A controlled choice task captures ae aspect, but naither task is a full test o gemmin performance. Woods et al., 2015
Does twice as mony options double reaction time?
The classic findins are aboot the information in the alternatives, no a universal dooble-it rule. The matchin, probabilities an task design matter. Hick, 1952 Hyman, 1953
Can A subtract ma scores tae measure thinkin time?
The subtraction mixes task an measurement differences unless a design has controlled them. It disnae automatically gie a pure estimate o ae processin stage. Woods et al., 2015 Anwyl-Irvine et al., 2020
Sources
- Woods et al. (2015). Factors that influence the latency o simple reaction time.
- Woods et al. (2015). Age-related slowin o response selection an production in a visual choice reaction time task.
- Hick (1952). On the rate o gain o information.
- Hyman (1953). Stimulus information as a determinant o reaction time.
- Ratcliff (1993). Methods for dealin wi reaction time outliers.
- Anwyl-Irvine et al. (2020). Realistic precision an accuracy o online experiment platforms, web browsers, an devices.
- Bridges et al. (2020). The timing mega-study: comparin a range o experiment generators, baith lab-based an online.
- Hedge et al. (2017). The reliability paradox: why robust cognitive tasks dinnae produce reliable individual differences.
Cite this page: Whit’s the difference atween simple an choice reaction time?. Helibrain. 2026. https://helibrain.com/sco/answers/simple-vs-choice-reaction-time. CC BY 4.0.
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