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 psychology to 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
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- 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 appears. Simple RT to detect the onset of a light flash is approximately 200 to 300 milliseconds[1].
- 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 green light appears.
F.C. Donders was among the first to systematically analyze human RT to measure the duration of mental operations.
See also
External links
Simple Reaction Time:
- Reaction Time Test (Flash) by HumanBenchmark
- Reaction Time Test by Cognitive Labs
Complex Reaction Time: