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Why is it wrong for a researcher to assign the first subjects to show up for an experiment to the experimental group and the second group of subjects to arrive to the control group?
Wiki User
∙ 9y ago
Because then the grouping is (technically) not random. In order for an experiment to yield proper results, the grouping must be random. If the researcher assigns subjects to groups in the order in which they arrive, then the randomness of the experiment is not present.
cw: There are experiments on experiments that show that the first half of subjects are different from the second half of subjects. Why is another question. So you should randomize the allotment of subjects to treatments (groups).
Wiki User
∙ 9y ago
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The group that does not receive the experimental treatment in an experiment is the?
control group
Are control groups and experimental groups the same thing?
In a controlled experiment, there are two groups. The control group is a group that nothing happens to. The experimental group is the group that you subject to the variable with which you are experimenting. At the end of the experiment, you test the differences between the control group, for whom nothing happened, and the experimental group, which received the variable. The difference (or similarities) between the two groups is how your results are measured.A control group is the group used for comparison in an experiment. One group receives the treatment that is being tested by the experiment; another group (the control group) has the exact same controlled environment, but does not receive this treatment. The effectiveness of the treatment can then be established by comparison with the control group.
What is an experiment in which neither the participants nor the individuals running the experiment know if participants are in the experimental or the control group until after the results are tallied?
That is referred to a double blind study.
How would someone equalize the intelligence of members of the experimental and the control group in a experiment?
Random assignment is used to equalize the intelligence of members of the experiment and the control group. By employing random assignment the results are attributed to the treatment and not a characteristic if the individuals in a group.
The procedure designed to ensure that the experimental and control groups do not differ in any way that might affect thee experiment's results is called?
random assignment Random assignment ensures that bias does not cause differences in representative samples divided into experimental and control groups.
In an experiment the subjects or items being investigated are divided into the experimental group and?
the control group
What part of the experiment is the researcher manipulates?
I'm doing my homework and i looked up this question but I am putting the answer as the experimental variable
In an experiment the group that is exposed to the variable to be tested is called the?
control group
What is the difference between control and experimental variables?
Control Variable = kept in constant in a experiment Experimental Variable = changes in a experiment
Why is it important to control an experiment?
The control experiment allows a standard of comparison for the experimental group
What is the name for an experiment in which a control group is compared with an experimental group?
The control group.
What is an experimental and control group?
it is the groups in experiment
What are two ways that researcher can avoid a biased sample?
experimental and control groups
What variable did the researcher change during this experiment?
Control Variable
In a controlled experiment what is the experimental group compared to?
The control group.
What is the difference between experimental variable and a control variable?
In a controlled experiment, the control variable remains constant while the experimental variable changes with each trial of the experiment.
How do a control sample and an experimental sample differ from each other?
A control sample is the experiment under regular conditions. An experimental sample is the experiment in which different variables are changed.
