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reaction time

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apperception

apperception  

n. (in psychology) the process by which the qualities of an object, situation, etc., perceived by an individual are correlated with his/her preexisting knowledge.
bit

bit  

Either of the digits 0 or 1 as used in the binary notation. Bits are therefore the basic unit of information in a computer system.
central reaction time

central reaction time  

According to an analysis introduced in 1868 by the Dutch ophthalmologist Franciscus Cornelius Donders (1818–89), the fraction of reaction time that remains after subtracting the time taken up by the ...
choice reaction time

choice reaction time  

Reaction time in a situation in which there are two or more possible stimuli requiring different responses. The usual measure involves a home button surrounded by eight other buttons, arranged in a ...
decision-making

decision-making  

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The process of acting upon the best information available in order to determine the most appropriate course of action.
discrimination reaction time

discrimination reaction time  

Reaction time to differences in an objectively measurable perceptual dimension such as brightness, length, or weight. A common procedure for measuring it involves an observer comparing pairs of ...
divided visual field

divided visual field  

A generic name for a variety of experimental techniques in which a viewer fixates (1) on a point while visual stimuli are flashed briefly in the left or right visual field, and measures of response ...
early responding

early responding  

Anticipation of a stimulus so that a movement can occur at or before the stimulus is given. During a 100 m sprint, for example, early responding may result in a false start when an athlete ...
electromechanical delay

electromechanical delay  

The delay between neural stimulation of a muscle and the development of muscle tension. The delay is partly due to the time required for the contractile elements of muscles to stretch the series ...
Emil Kraepelin

Emil Kraepelin  

(1856–1926).German psychiatrist, educated at Würzburg, who became professor of psychiatry at Dorpat (1886), Heidelberg (1890), and Munich (1903). He was probably the only psychiatrist of his day to ...
Fitts' law

Fitts' law  

In reaction time experiments in which a subject or participant moves a stylus as quickly as possible from a starting position to a target, a relation observed between movement time (MT) on the one ...
foreperiod

foreperiod  

In measurements of reaction time, the interval between the warning signal and the presentation of a stimulus to which the subject is expected to respond. It also refers to the period between a ‘get ...
Hermann Ludwig Ferdinand von Helmholtz

Hermann Ludwig Ferdinand von Helmholtz  

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(1821–94)German physiologist and physicist. In 1850 he measured the speed of a nerve impulse and in 1851 invented the ophthalmoscope. Helmholtz discovered the conservation of energy (1847), giving ...
James Rowland Angell

James Rowland Angell  

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Subject:
Philosophy
(1869–1949).American psychologist. He worked at Harvard with William James, then at Chicago, where he became a founder of the Chicago ‘functionalist’ school which stressed the importance of ...
latent period

latent period  

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(in neurology) the pause of a few milliseconds between the time that a nerve impulse reaches a muscle fibre and the time that the fibre starts to contract.
motor fitness

motor fitness  

The neuromuscular components of fitness, which enable a person to perform successfully at a particular motor skill, game, or activity. Specific motor fitness components include agility, balance, ...
motor outflow time

motor outflow time  

The time period between the change in electrical activity in the motor cortex and the start of electrical activity prior to a movement. It is a component of reaction time.
personal equation

personal equation  

A person's characteristic reaction time, or a correction for it, first investigated after an incident in which Neville Maskelyne (1732–1811), the eighth Astronomer Royal at Greenwich, reported in ...
physical fitness

physical fitness  

The ability to function efficiently and effectively, to enjoy leisure, to be healthy, to resist disease, and to cope with emergency situations. Health-related components of physical fitness include ...
physiological time

physiological time  

The fraction of reaction time taken up by the passage of a nerve impulse from the sensory receptor to the brain and of another nerve impulse from the brain to the muscle. According to an analysis ...

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