Consider a 2 x 2 experiment design in which both study time and sleep time have been manipulated and learning has been measured. An interaction between study time and sleep time can be interpreted to mean which of the following?
a. Sleep time affects learning, controlling for study time.
b. Sleep time has no effect on learning.
c. The effect of study time on learning is different in the different levels of sleep time.
d. If the main effects are also significant, the interaction between study time and sleep time cannot be interpreted.
Differences on the dependent measure between the levels of one factor within one level of another factor are known as
a. an interaction.
b. a main effect.
c. a simple effect.
d. a p-value.
Which of the following statements is correct?
a. The marginal means show the main effects, whereas the cell means show the simple effects.
b. The marginal means show the interactions, whereas the cell means show the simple effects.
c. The cell means show the main effects, whereas the marginal means show the simple effects.
d. The marginal means show both the main effects and the simple effects.
Consider a 2 x 2 experiment design in which both study time and sleep time have been manipulated and learning has been measured. If a main effect of sleep time is found, this can be interpreted to mean which of the following?
a. Sleep time affects learning, controlling for study time.
b. Study time has no effect on learning.
c. Study time and sleep time both influence learning.
d. The interaction between study time and sleep time is not significant.
Differences on the dependent measure in the different levels of any one factor, controlling for all other factors in the experiment, are known as which of the following?
a. Marginal means
b. Interactions
c. Main effects
d. Simple effects
Marginal means indicate the means of which of the following?
a. A simple effect
b. An interaction
c. A main effect
d. A crossover interaction
A schematic diagram is used to
a. diagram the specific predictions of the research hypothesis.
b. undo the interactions that occurred in an experiment.
c. present the means of the independent variable.
d. describe the research hypothesis in terms of predicted correlations.
In a factorial design in which the factors are crossed,
a. each of the factors has more than two levels.
b. each of the factors has a different number of levels.
c. each level of one factor occurs with each level of the other factor.
d. there are more levels than conditions.
A 5 x 6 x 2 design has
a. six factors and thirteen conditions.
b. thirty factors and six conditions.
c. sixty conditions and three factors.
d. fifty conditions and three factors.
The term factor refers to which of the following?
a. An independent variable in a factorial design
b. The dependent variable in an experimental design
c. A measured variable in an experimental design
d. A statistical analysis used in experimental research
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