PSYB01H3 Chapter Notes - Chapter 10: Dependent And Independent Variables, Repeated Measures Design, Complement Factor B
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An independent variable can have more than two levels. An experiment with only two levels o the independent variable could not yield exact information. T-test can analyse independent variables with two levels. Complex designs are important because researchers are interested in comparing more than two groups. System that simultaneously identifies the number of iv and the number of levels of each. Number of levels of first iv x number of levels of second iv x number of levels of third iv ex, 3 x 3 x 3. Look at all possible combinations of the different levels of each iv. Number of conditions can be determined by calculating the product of the numbers in the notation system. 2 x 2 x 4 = 16. When the effect of one iv depends on the level of another iv. 3 x 2 x 3 = 4 interactions. An experiment can have more than one independent variable: factorial designs.
