- Reaction time
Reaction time (RT) is the elapsed time between the presentation of a sensory stimulus and the subsequent behavioral response. RT is often used in
experimental psychologyto measure the duration of mental operations, known as mental chronometry. The behavioral response is often a button press but can also be an eye movement, a vocal response, or some other observable behavior.
Types of RT tasks
*Simple reaction time is usually defined as the time required for an observer to detect the presence of a stimulus. For example, an observer might be asked to press a button as soon as a light or sound appears. Mean RT is approximately 180 to 200
milliseconds to detect visual stimuli, whereas for sound it is around 140-160 milliseconds. [http://biae.clemson.edu/bpc/bp/Lab/110/reaction.htm#Type%20of%20Stimulus] Verify credibility|date=August 2008
*Go/No-Go reaction time tasks require that the observer press a button when one stimulus type appears and withhold a response when other stimulus types appear. For example, the observer is to press the button when a red light appears and not respond when a green light appears.
*Choice reaction time tasks require distinct responses for each possible class of stimulus. For example, the observer may be asked to press one button if a red light appears and a different button if a yellow light appears.
Abū Rayhān al-Bīrūnīwas the first to describe the concept of reaction time: [citation|first=Muhammad|last=Iqbal|author-link=Muhammad Iqbal|title= The Reconstruction of Religious Thought in Islam|chapter=The Spirit of Muslim Culture|url=http://www.allamaiqbal.com/works/prose/english/reconstruction|accessdate=2008-01-25] Franciscus Donderswas among the first to systematically analyze human RT to measure the duration of mental operations.
Simple Reaction Time Tests: (note that the hardware/software setup will greatly affect measurements making the scores largely incomparable from user to user)
* [http://humanbenchmark.com/tests/reactiontime/index.php Reaction Time Test (Flash)] by HumanBenchmark
* [http://cognitivelabs.com/mydna_speedtestno.htm Reaction Time Test] by Cognitive Labs
Complex Reaction Time:
* [http://projectimplicit.com Project Implicit] by
Simple Reaction Time:
* [http://www.chss.montclair.edu/psychology/museum/mrt.html Historical Background] by Museum of the History of Reaction Time Research
* [http://hypertextbook.com/facts/2006/reactiontime.shtml Fingertip Reaction Time] by The Physics Factbook
* [http://biae.clemson.edu/bpc/bp/Lab/110/reaction.htm A Literature Review on Reaction Time]
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Look at other dictionaries:
Reaction time — Reaction Re*ac tion (r[ e]*[a^]k sh[u^]n), n. [Cf. F. r[ e]action.] 1. Any action in resisting other action or force; counter tendency; movement in a contrary direction; reverse action. [1913 Webster] 2. (Chem.) The mutual or reciprocal action of … The Collaborative International Dictionary of English
reaction time — n the time elapsing between the beginning of the application of a stimulus and the beginning of an organism s reaction to it * * * the time elapsing between the application of a stimulus and the resulting reaction … Medical dictionary
reaction time — n. Psychol. the lapse of time between stimulation and the beginning of the response … English World dictionary
reaction time — noun the time that elapses between a stimulus and the response to it • Syn: ↑response time, ↑latency, ↑latent period • Hypernyms: ↑time interval, ↑interval * * * noun : the … Useful english dictionary
reaction time — suveikimo trukmė statusas T sritis fizika atitikmenys: angl. reaction time; triggering time vok. Ansprechzeit, f rus. время срабатывания, n pranc. temps de réaction, m … Fizikos terminų žodynas
reaction time — reakcijos laikas statusas T sritis Kūno kultūra ir sportas apibrėžtis Laiko trukmė nuo signalo (dirgiklio) pradžios iki žmogaus organizmo reagavimo į tą signalą. Reakcijos laikas priklauso nuo genetinių veiksnių, dirgiklio modalumo (klausos,… … Sporto terminų žodynas
reaction time — 1. The elapsed time between the initiation of an action and the required response. 2. The time required between the receipt of an order directing an operation and the arrival of the initial element of the force concerned in the designated area … Military dictionary
reaction time — space of time between a stimulus and a response to it … English contemporary dictionary
reaction time — The time required for response to a stimulus, especially in an emergency. 8 Am J2d Auto § 893 … Ballentine's law dictionary
reaction time — Psychol. the interval between stimulation and response. [1875 80] * * * … Universalium