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The students acting as prisoners were showing signs of extreme distress.
Well, when something changes, you would not know which variable caused the change in the experiment.
Because otherwise you would not know what change caused the effect you noticed.
Because, if he changes several variables at the same time, he will not know which of them caused the result of the experiment to change. He would have to test again, changing one variable at a time.
A controlled experiment means that you try to keep all the variables that are involved in the experiment under control apart from the Dependent and the Independent variables to make sure that any results obtained from the experiment have been affected by the independent variable and not some other extraneous variable. It also ensures that the experiment would have high validity. That is, if the experiment has really measured what it was supposed to measure.
The students acting as prisoners were showing signs of extreme distress.
the social context
You need to control the variables because if you have two or more variables in an experiment you will never know which variable caused a change or not caused a change.
DNA
In an experiment, your control variable will not be caused to vary by the experiment. Think of 'cause and effect'. The independent variable is the cause, the result is the effect, and the dependent variable is the one that you leave to be changed by the experiment.
If you change more that one variable in an experiment, then when the result occurs, you won't know which variable caused the change.
In an experiment, your control variable will not be caused to vary by the experiment. Think of 'cause and effect'. The independent variable is the cause, the result is the effect, and the dependent variable is the one that you leave to be changed by the experiment.
Well, when something changes, you would not know which variable caused the change in the experiment.
Complications of this procedure caused researchers to develop means of widening the vessel using a minimally sized device
A molecue called the s (strain).
The heavy, dense nucleus of the atom caused the alpha particles to bounce back in Rutherford's experiment.
Yes she can make sure it is the reason by forming a experiment