control (redirected from controllability)

control /con·trol/ (kon-trol´)

1. the governing or limitation of certain objects or events.

2. a standard against which experimental observations may be evaluated.

3. the conscious restraint, regulation, or suppression of impulses, instincts, and affects.

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aversive control  in behavior therapy, the use of unpleasant stimuli to change undesirable behavior.

birth control  deliberate limitation of childbearing by measures to control fertility and to prevent conception.

motor control  the systematic transmission of impulses from the motor cortex to motor units, resulting in coordinated muscular contractions.

stimulus control  any influence of the environment on behavior.

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con·trol (kn-trl)

v.

1. To verify or regulate a scientific experiment by conducting a parallel experiment or by comparing with another standard.

2. To hold in restraint; check.

n.

1. A standard of comparison for checking or verifying the results of an experiment.

2. An individual or group used as a standard of comparison in a control experiment.

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control,

n 1. power to direct the outcome of events that occur throughout life. To develop effective problem-solving skills and strategies, one must specifically differentiate between the circumstances that can and cannot be personally managed. For instance, one can direct the events associated with a work but not the outcome of a surgery. In behavioral medicine, it is one of the three unique attitudes associated with stress hardiness.
2. comparison standard as part of comparative test design.
3. the group selected for comparison to a test group in order to assess a hypothesis. See also stress hardiness.

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control

1. the governing or limitation of certain objects or events.

2. a standard against which experimental observations may be evaluated, as a procedure identical to the experimental procedure except for the one factor being studied; a requirement of any planned experimental study. Also, any individual of the group exhibiting the standard characteristics.

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disease control

restraining or reducing the prevalence of individual disease. Includes the range of strategies from limitation of occurrence to eradication. Implies legislative control of notifiable disease.

control elements

nucleotide sequences on DNA that usually precede (upstream) the sequences coding for the structural gene at which regulator proteins act.

control factor

in a comparison between diseases caused by a number of contributing factors it may be necessary to supply controls for one or more of these factors.

control group

the group of animals with which the experimental group is to be matched; the group which has not had its variables manipulated experimentally. The selection of the animals to be included in the two groups may be based on matching them with respect to age, to their history of nutrition or inheritance, or vaccination or prophylactic treatment. Called also controls.

ovulation control

prevention of ovulation by administration of progesterone or stimulation of ovulation by injection of follicle-stimulating hormone are examples.

paired control

comparison between the experimental and control groups is most accurate if the control animal for each experimental animal is selected to be as similar as possible, i.e. a paired control.

control pole

a pole with a noose at the end used to catch and restrain small animals.

control population

a large control group.

population control

a variety of techniques are used with contraception being least used. Permanent surgical interference is common in food, racing and companion animal groups, and termination of pregnancy and estrus synchronization, both by hormonal means, are also extensively practiced. Increasing the culling rate is the standard procedure for dealing with a feed shortage.

x-ray control unit

the controlling mechanisms in an x-ray machine. Include the voltmeter and voltage compensator control, the kilovoltage, milliameter and milliamperage selectors and the timer and exposure control button.