STAT-2126EL Lecture Notes - Lecture 3: Experiment, Dependent And Independent Variables, Confounding
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14 Dec 2018
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Control condition (group): do not receive treatment. Hypothesis: what is the predicted relationship between the i. v. and d. v. Definitions that can be used to measure the variable you are interested in. May not be perfect representations of variables but are necessary. Try to think of one for: height and age, obesity. When there is a difference in two groups it can be due to three things: treatment had an effect, there was something bad about the experimental design, difference was due to chance. In a true experiment the independent variable is manipulated by the researcher. Compare the three main types of research study: Quasi-experimental: measure ne and use it to assign groups, measure the other.