In subscription promotion tests, the basic package against which other promotions are compared
Person(s) or object in an experiment selected to be like the experimental subject except for the variable being tested.
Researchers design experiments to eliminate (control for) the effect of non-experimental variables on the results. For example, a study may compare the outcomes of two groups that differ only because one received the experimental condition and the other did not (the control group). Medication trials are often “placebo controlled” by using a control group that is treated similarly in all ways except they receive a non-active medication (placebo) instead of the active medication being studied.
A standard of comparison by which experimental results are evaluated. A control differs from the experiment in a single variable, and enables the assessment of significance of experimental results.
in the scientific method, a situation in which a comparison can be made between a specific situation and a second situation that differs, ideally, in only one aspect from the first.
In a case-control study, comparison with a group of people who do not suffer from the disease under investigation.
Subject(s) used for comparison who are not given a treatment under study or who do not have a given condition, background, or risk factor that is the object of study. Control conditions may be concurrent (occurring more or less simultaneously with the condition under study) or historical (preceding the condition under study). When the present condition of participants is compared with their own condition on a prior regimen or treatment, the study is considered historically controlled.
in an experiment, a setup duplicating all conditions except the variable being tested.
An inactive substance (also known as a placebo) sometimes given to trial participants. In a vaccine trial, the control group is compared with one or more groups of volunteers given experimental vaccines.
a standard against which other conditions can be compared in a scientific experiment; "the control condition was inappropriate for the conclusions he wished to draw"
verify or regulate by conducting a parallel experiment or comparing with another standard, of scientific experiments; "Are you controlling for the temperature?"
a copy of an experiment in which you do nothing
an additional experimental trial or run
a neutral "reference point" for comparison that allows you to see what changing a variable does by comparing it to not changing anything
a part of an experiment that is designed to use every brain function except the one being studied
a part of the experiment that tests whether the system behaves as it should
a patient who receives a treatment used for comparison with the study drug or treatment
a set of base values against which you compare the data from your experiments
a standard against which experimental observations are evaluated
a treatment or an experiment that you can compare with the results of your test groups
Part of an experiment in which the variable is not changed; it is used to compare and contrast results
In a clinical trial, one therapy must be tested against another to determine if there are any differences between treatments. The control is the treatment being tested against the new therapy and may or may not be a therapy that is already considered standard treatment for the disease.
A standard for comparing, checking or verifying the results of an experiment or activity.
(or statistical control) refers to procedures used with real-world data when the condition of "all other things being equal" cannot be attained by experimental design.
(or Control Group)—in an experiment, it is the group or subject not exposed to the variable or condition (for example, not exposed to oiling or not exposed to cleanup techniques).
A group used as a standard of comparison for checking the results of an experiment.
one setup in an experiment that is exactly the same as the other setup except for the factor being tested
The treatment with which the drug being tested is compared â€“ often placebo or a marketed drug.
In a case-control study, comparison group of persons without disease.
A device used to verify or regulate a scientific experiment or study. A case-control study serves as a useful example. Since patients with a specific illness are examined for various characteristics, a group of healthy individuals who otherwise have as much in common with the patients as possible must be examined in parallel for the same characteristics.
a substance or product included in a trial that is used to compare its effect to that of the vaccine being studied. The control may be an inactive substance ( placebo) or some other vaccine product.
The standard that is compared against. In order to determine if a new treatment is beneficial, it must be compared against a standard. Almost all clinical trials have a control arm.
To test or verify a scientific experiment by a parallel experiment or other standard of comparison
(a) In clinical parapsychology, a procedure undertaken to insure the scientific validity of the experiment by insuring that data results are not unduly influenced by extraneous factors. See also "artefact". (b) A discarnate entity which communicates through a trance medium. Term is derived from the notion that it is the entity which generally controls the trance state.
In experimental parapsychology a procedure undertaken in order to ensure that the experiment is conducted in a standard fashion and so that results are not unduly influenced by extraneous factors.
A comparison group for an experimental agent in a clinical trial. A control group receives standard treatment (if it exists) or a placebo.
A Control is material or preparation used in pre-clinical or clinical studies, for comparison purposes, with the study intervention or drug. Often the control is a placebo or an inert material.
in vaccine clinical trials, the control group is given either the standard treatment for the disease or an inactive substance called a placebo. The control group is compared with one or more groups of volunteers given experimental vaccines to detect any effects of the vaccines.
() ( Yield). The regulation of annual or periodic fellings. See Control, area; Control, basal area; Control, volume. () ( Adm). The comparison of operation carried out in a forest with those prescribed by the working plan. See Control forms. () (Experimental). That part of an experimental series providing a standard of comparison for determining the effects of the treatments. () ( Protec.) A check on the increase of the population of an insect, animal or plant imposed by a single factor or a combination of factors. These may be natural (climate, nutritional factors, parasites or disease) or artificial ( silvicultural practices or direct intervention by biological, mechanical or chemical means). ( BCFT modif.).
In a scientific experiment, the control is the group that serves as a standard of comparison. It is exposed to the same conditions as the experimental group, except for the variable being tested. In the standard lettuce seed bioassay, the control is the set of seeds grown in distilled water rather than in a test solution.
a condition in a scientific experiment that remains the same.
the person or group used for comparison. In a trial (experiment), the control group does not receive the drug or agent being tested.
A control is the standard by which experimental observations are evaluated. In many clinical trials, one group of patients will be given an experimental drug or treatment, while another group (the control) is given either a standard treatment for the illness or a placebo.
A control is a sample or specimen used to normalize an instrument or an experiment. It demonstrates that selected parameters or values are being observed correctly by the measurement system. When stable and identical controls are used, they serve as a basis for comparing observed data from different times and places. Control parameters are not always NIST traceable or certified, but they are usually well known or characterized.
A material having a known history, the performance of which has been established previously, and which is used as a standard of comparison.
A control is a test subject not exposed to the treatment or condition being studied by the experiment. Controls are used to isolate factors or conditions which vary in other subjects under experimentation.
This is a procedure in paranormal psychology that ensures that the experiment is conducted in a standard fashion so that the results will no be influenced by any extraneous factors.
The people in a 'control' group or arm in a controlled trial or a case-control study (also called the comparison group). In a trial, people who are the 'controls' represent the status quo (current standard treatment) or placebo (dummy) treatment, against which the effectiveness of a treatment is tested.
The arm of a randomized trial in which participants receive the standard treatment or a placebo.
Group in a trial or study which does not receive the treatment being evaluated in order for comparative results to be obtained. In the case of MIST II, the control group will not have their PFO closed during the study.
Describes the measures taken in a scientific experiment to account for unsuspected effects of anything other than the thing being tested. For instance, when testing a medical treatment, scientists will have a treatment group as well as a "control" group that is not treated for comparison.
The Spirit that sends messages through a medium in trance.
A standard, which is used to compare experimental results to (A.K.A. benchmark).
(i) A personality purporting to be that of some deceased individual, believed to take control of the medium's actions and speech during trance, and/or who habitually relays messages from the communicator to the sitter. (ii) In the context of scientific investigation, a control is something (a procedure, condition, object, set of subjects, and so on) which is introduced with the purpose of providing a check on (that is, of "controlling for") the influence of unwanted factors.
A control, or control group, serves as a standard or reference for comparison with the group on which the experiment is being conducted.
A comparative condition in an experiment. A control is typically a treatment in an experiment in which no parts are varied, so that other treatments can be compared to this standard and the effect of the variables can be determined.