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onemustfall! onemustfall!
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11 years ago
What makes a study an experiment as opposed to an observational study?

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#1
11 years ago
In an experiment you are actively controlling the variables to test for different outcomes. In an observational study the researcher does nothing but collect data from different sources.
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#2
11 years ago
If you manipulate something, and see what happens as a result of the change that you've made, that is an experiment. In an observation, you simply observe what occurs without actually changing anything.

The thing you change in an experiment is called the independent variable. The thing you are observing to detect change as a result is the dependent variable
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