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Analysis of Variance Designs by A. J. Guarino, Lawrence S. Meyers, Glenn Gamst

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Chapter Six One-Way Between-Subjects Design

6.1 Overview

In a between-subjects design the levels of the independent variable are represented by different participants. A one-way between-subjects design has just one independent variable. In the room color study described in earlier chapters, for example, the independent variable was the color of the room. The independent variable is said to have levels, which are usually referred to as treatment levels or treatment conditions. A level is the value of the independent variable for a given group. Our room color variable had two levels, red and blue. In the data file, these conditions would be coded arbitrarily as 1 and 2.

We are not limited to having only two levels for an independent variable. Theoretically, ...

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