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A researcher conducts a 2 × 3 factorial experiment examining the effects of therapy type (cognitive-behavioral vs. psychodynamic) and session frequency (weekly, biweekly, monthly) on anxiety scores. When creating a bar graph of the results, the researcher places session frequency on the x-axis and uses different bar colors to represent therapy type. A colleague argues that the graph is incorrect because the variable with fewer levels must always go on the x-axis. The colleague's criticism is valid.
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Research Methods in Psychology - 4th American Edition @ KPU
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When graphing the results of a factorial experiment with two independent variables, what determines which variable is placed on the x-axis and which is represented by formatting features like bar color or line style?
A researcher conducts a 2 × 3 factorial experiment examining the effects of therapy type (cognitive-behavioral vs. psychodynamic) and session frequency (weekly, biweekly, monthly) on anxiety scores. When creating a bar graph of the results, the researcher places session frequency on the x-axis and uses different bar colors to represent therapy type. A colleague argues that the graph is incorrect because the variable with fewer levels must always go on the x-axis. The colleague's criticism is valid.