The trick to designing a good experiment is to figure out a way for it to test
the effects of only one variable, and to avoid any effects of others.
There are three types of variables tested: manipulated variables, controlled variables, and experimental variables.
It depends on the experiment. Normally only one is tested at a time because they can affect the experiment. Variables are tested in a controlled experiment to see whether they affect the outcome and also how.
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In a controlled experiment only 1 variable is being tested.
There are three types of variables tested: manipulated variables, controlled variables, and experimental variables.
It depends on the experiment. Normally only one is tested at a time because they can affect the experiment. Variables are tested in a controlled experiment to see whether they affect the outcome and also how.
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Only the one being tested
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In a controlled experiment only 1 variable is being tested.
Just one at a time
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1) I learned that you can have as many variables as you want. 2) You can change the variables. 3) Variables is used in an experiment. 4) A variable is something that can be changed, such as a characteristic or value. Variables are generally used in Psychology experiments to determine if changes to one thing result in changes to another.
An experiment of any kind can have infinitely many variables. A controlled experiment can have just as many, provided that all but one are kept exactly the same.
All variables except one, the experimental variable, are kept constant in an experiment.