control experiment


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experiment

 [ek-sper´ĭ-ment]
a procedure done in order to discover or demonstrate some fact or general truth. adj., adj experimen´�tal.
control experiment one made under standard conditions, to test the correctness of other observations.

con·trol ex·per·i·ment

an experiment used to check another, to verify the result, or to demonstrate what would have occurred had the factor under study been omitted or held constant.
See also: control, control animal.

con·trol ex·per·i·ment

(kŏn-trōl' eks-per'i-mĕnt)
An experiment used to check another, to verify the result, or to demonstrate what would have occurred had the factor under study been omitted.
See also: control

experiment

a study involving a comparison group in which the investigator intentionally alters one or more risk factors in order to discover or demonstrate some fact or general truth.

control experiment
one made under standard conditions, to test the correctness of other observations.
controlled experiment
one in which an exact replica of the animals experimented on are kept without any treatment in order to show what changes occurred in normal animals, reinforcing the view that the observed changes in the experimental animals were in fact the result of the treatment administered.
factorial experiment
one set up in such a way that all levels of each intervention or treatment occur with each level of response.
field experiment
one carried out in normal circumstances and environment, e.g. on the farm or in the cattery rather than in an experimental institution where many of the factors affecting the occurrence or severity of a disease may not operate.
laboratory experiment
carried out in a laboratory where conditions can be almost completely controlled.
latin square experiment
a method of laying out a field experiment in such a way as to avoid bias by physical location.
prospective experiment
those carried out to see what happens if certain influences are applied to an animal or a group of animals. Retrospective experiments are those which set out to explain events that have already been observed.
References in periodicals archive ?
Meanwhile, the compost manures of the plastic bins and those of the control experiments continued to maintain low pH throughout the composting period.
These effects are, even under the most stringent statistical analysis, significantly above and beyond what were noticeable in the control experiments.
However, although these models exhibit certain hybrid phenomena, they were originally designed for continuous control experiments (e.
Bush built a two-stage activated charcoal cryofilter to remove deuterium and all other gases except helium, and did six control experiments with regular water after the team detected helium in experiments with deuterium.
Errors were nearly as rare asin control experiments using traditional base pairs, the researchers note in their report.
Phosphate rock combined with zeolite resulted in gross yields 4 times higher than control experiments.
In the passion of the moment, scientists are failing to do even simple but crucial control experiments, he adds.
In addition, the following facilities are part of systems for the diagnosis discharge plasma and thin-film materials during their creation and management of computer experiments: Monitor the growing thickness of the layer system for time-and space-resolved optical emission spectroscopy, Langmuir probe system with spatial and temporal resolution chromatographic system for measuring, process gas analyzer and software and hardware for computer control experiments.
The subject of the public contract is to supply one piece deposition device for controlled preparation of thin-film materials with different diagnostics, including vacuum pumping system, plasma (sputtering) sources, circular magnetron with adjustable magnetic field, weight, filters, clusters, substrate holder for holding the sample carrier, a system for the exchange of samples without venting the deposition chamber, inlet working gas, power units, electric probes, USB oscilloscope with the control program, the cooling system, the control system of the deposition apparatus, monitor the thickness of the growing layer and the software and hardware for computer control experiments.