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In a study examining the effect of room illumination (low, medium, high) and room temperature (cold, warm, hot) on test performance, how many main effects are possible?
A) 2
B) 3
C) 6
D) 9
Main Effects
The direct impact of an independent variable on a dependent variable in an experiment, separate from any interaction effects.
Room Illumination
The level and quality of light in an environment, which can affect participants' behavior and performance in experiments.
Room Temperature
A commonly accepted range of air temperature that is comfortable for humans, typically around 20°C to 22°C (68°F to 72°F).
- Recognize the principal effect along with the interaction consequences in factorial setups.
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Learning Objectives
- Recognize the principal effect along with the interaction consequences in factorial setups.
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