Friday, February 5, 2010

2. Describe the difference between a true experiment and a non-experimental design?

2. Describe the difference between a true experiment and a non-experimental design. From which can causation be inferred? Why2. Describe the difference between a true experiment and a non-experimental design?
A true experimental design is one where the researcher is minipulating an independent variable. For example, in a study about drinking alcohol, the researcher would have various groups and administer various amounts of alcohol to each group.





In a non-experimental design, the researcher is NOT minipulating variables, but is searching for a pre-existing relationship found in nautre. For example (using the same drinking study idea), the researcher would simply ask people how much they had to drink rather than making them have a certain amount.





You can only find true causel relationships in true experiments, because you have control. In non-experimental designs, there are extraneous variables that may confound the data.

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