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Why is it necessary to have both an experimental group and a control group?
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What conditions must be met if you want to have a scientifically valid sample for a study?
You must have a control group, an experimental group, an experimental variable (also called the independent variable), and a response to be measured (also called the dependent variable). The experimental variable is applied only to the experimental group, so that any difference between the control group and experimental group is due only to the experimental variable. Both the control group and experimental group must have the same conditions, except for the experimental variable.
What is the name for an experiment in which a control group is compared with an experimental group?
The control group.
Why should the sample size of the control group be the same as the size of the experimental group?
In a scientific experiment, the control group and the experimental group are treated the same way except for the variable being tested. Because the margins of error increase as the sample size gets smaller, both groups should be the same size.
In the experimental group in spallanzanis experiment the?
both remained clear
What is the controlled variables on an experiment?
-conditions or events that could affect the dependent variable (outcome of an experiment) but do not, because they are held constant for for both the experimental and control group.
What is the same between the experimental and control group?
The similarity between the experimental group and the control group is that in both cases, results are expected.
What conditions must be met if you want to have a scientifically valid sample for a study?
You must have a control group, an experimental group, an experimental variable (also called the independent variable), and a response to be measured (also called the dependent variable). The experimental variable is applied only to the experimental group, so that any difference between the control group and experimental group is due only to the experimental variable. Both the control group and experimental group must have the same conditions, except for the experimental variable.
The experimental procedure in which both the experimenter and subject are unaware of who is in the experimental and who is in the control group is referred to as the?
Double blind experiment.
Why is the control and experimental group needed for an experiment?
The control group is necessary to know if the factor being tested is making a difference in the experimental group. Both should be subject to the same conditions, except for the one condition or factor being tested on the experimental group. Differences between the outcomes of the two groups, good or bad, can then be attributed to the one factor that is different. Without the control, it would be most difficult to tell what the factor being tested had done, because it's not really possible to tell what would have happened without it.
What is the name for an experiment in which a control group is compared with an experimental group?
The control group.
Is an investigation in which a group that receives some experimental treatment is compared to a group that does not receive the experimental treatment.?
An investigation in which a group that receives some experimental treatment is compared to a group that does not receive the experimental treatment can be called a placebo-controlled study or a comparative experiment, both of which are types of clinical studies. The group receiving the experimental treatment is called the treatment group, and the group that is not receiving the experimental treatment is called the control group.
Why should the sample size of the control group be the same as the size of the experimental group?
In a scientific experiment, the control group and the experimental group are treated the same way except for the variable being tested. Because the margins of error increase as the sample size gets smaller, both groups should be the same size.
Why do you need a control group and a experimental group?
A control group is not provided any treatment, while the experimental group is the one to which a treatment is applied. The control and experimental groups are chosen to be as similar as possible, so that the observed effect (if any) can be attributed to the variable: what only the experimental group consumes, uses, or participates in.
What is the group of participants chosen for an experiment called?
When conducting an experiment, there are two groups. One group is called the experimental group. This is the group that the treatment is being given too. The second group is called the control group. This group is not given the treatment and is used to compare the experimental group with. An example would be: A new medicine for heartburn was being tested. The experimental group would be given the medicine. The control group would be given a sugar pill. When the treatment was done, the results of both groups would be compared and a decision would be made as to the medications effectiveness.
What is a control group in psychology?
A control group is usually used in experimental psychology to study the effect of an intervention or treatment. Research in psychology covers a number of topics. Sometimes, in order to verify whether an effect is significant, it is necessary to compare two groups or more. One of these groups will be a control group. A control group will often present the same characteristics as the other groups but will not be exposed to treatment or intervention, contrary to its counterpart(s). For example, group A can receive a newly developed therapy for depression, whereas the control group will not receive this therapy. Later on, both depressed groups will be compared to determine if the therapy had a significant effect, or, in other words, if it worked. Another example pertains to social therapy. A researcher could study the effect of setting short terms realistic goals on attaining long term goals. As such, a group of students would receive help on how to set short term goals, how to reach them, how to deal with obstacles, etc to attain long term goals. The control group, also made of students, would not receive such an intervention and would be told to set up long term goals and try to achieve them. At the end of the research period, both groups would be compared to see whether the intervention in helping setting short term goals and achieving them made a difference in term of goal achievement.
What is the one factor that is different between the control group and the experimental group?
By definition, the control group is what the experimental group is measured against. For example, if one is doing an experiment to measure the effect of a drug on blood pressure, the experimental group would receive the drug and the control group would receive the placebo, or blank. The blood pressure of both groups would be measured after ingestion of either the drug or placebo and any differences in blood pressure we would attribute to the effect of the drug. Care must be taken, however, that the two groups are as identical as possible and that all procedures are carried out identically. Furthermore, to eliminate even more bias, both the researchers and the experimental subjects would not know whether they were receiving drug or placebo (a double-blind study).
In the experimental group in spallanzanis experiment the?
both remained clear
