reaction time
Definition
Noun: - The time that elapses between a stimulus and the response to it: This is the interval between the presentation of a sensory stimulus and the subsequent behavioral or motor response. It is a measure of the speed of processing and responding.
Usage
- Reaction time is typically measured in milliseconds (ms).
- It is a key concept in psychology, neuroscience, sports science, and human factors engineering.
- It is often used to assess cognitive function, alertness, or the effects of factors like fatigue, age, or substances.
Examples
- Noun:
- A driver's reaction time is critical for avoiding accidents.
- The study measured the average auditory reaction time in young adults.
- Fatigue can significantly slow your reaction time.
Advanced Usage
- Simple reaction time: The time taken to respond to a single, predetermined stimulus with a single, predetermined response.
- Pressing a button as soon as a light appears measures simple reaction time.
- Choice reaction time: The time taken to respond when there are multiple possible stimuli, each requiring a different specific response.
- Pressing a left button for a red light and a right button for a green light measures choice reaction time.
Variants and Related Words
- Response time: Often used synonymously with "reaction time," though it can have broader applications in fields like computing (e.g., server response time).
- Latency: A more technical term often used in physiology and technology to describe a delay between a stimulus and response.
Synonyms
- Response latency
- Response delay
Related Phrases
- Mental chronometry: The scientific study of the time course of mental operations, of which reaction time is a primary measure.
- Stimulus-response time
Notes
- Reaction time is a compound noun. The explanation focuses on the meaning of this specific term as a single unit of meaning. It is not an analysis of the separate words "reaction" and "time" in isolation.
Noun
-
the time that elapses between a stimulus and the response to it
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