Exam 12: Expanding the Simple Experiment: Factorial Designs

One simple main effect for caffeine is much less thanthe other simple main effect for caffeine. Your best guessis that

If, in a 2 X 2 experiment, you know that main effectsexist for both factors, then you know

If the lines in a graph cross, this indicates

To estimate the interaction in a 2 X 2 factorial experiment,you

In a graph of experimental results, the presence of aninteraction is indicated by

A crossover interaction may indicate that a treatment has the opposite effect on two groups.

The easiest way to visualize an interaction is to graph the data.

Which of the following is true?

Given that the null hypothesis for interaction has beenrejected, the corresponding graph of this interactionshould contain two or more __________ lines.

A researcher is using 60 participants in a 2 (levels of exercise) X 2 (levels of caffeine) between subjects factorial experiment. The degrees of freedom for the exercise main effect is

An interaction occurs when an independent variable has a different effect when a second variable is present than when the second variable is absent.

A significant interaction usually indicates that the treatment effect is not the same in all conditions.

If there is a caffeine and exercise interaction, which of thefollowing is not necessarily correct

The simplest factorial experiment is the 1 X 1 experiment.

All of the following are true EXCEPT

Give an example of how the variable of similarity could be represented by an interaction between two variables.

The numbers (i.e., 2 x 6) included when identifyingfactorial designs stand for

Factorial experiments permit you to look at the effects of more than one independent variable at a time.