Home Chapter 9 Study Guide Pretest

# Pretest

This activity contains 10 questions.

## Your friend tells you she is using a factorial design in her experiment. You immediately know that she

 used a single independent variable with more than 3 levels. used repeated measures. included more than one dependent variable. included more than one independent variable.

## In a factorial design, the term "main effect" refers to

 the most important dependent variable in the experiment. the influence of an independent variable on the dependent variable. the combined influence of two or more independent variables on the dependent variable. an independent variable that produces a large effect size.

## In a factorial design, an "interaction" is present when

 a single independent variable has different effects on two separate dependent variables. some participants score high on the dependent variables and others score low. the effects of one independent variable on the dependent variable vary according to the levels of a second independent variable. the experimenter's treatment of the subjects is biased.

## Which of the following is true concerning a Solomon four-group design?

 It can only be used for nominal or ordinal scale data. It contains four independent variables. It can be used to detect pretest sensitization. All groups receive a pretest and posttest.

## A 3 x 4 x 2 factorial design would use _____ total conditions.

 3 24 14 9

## Imagine you graphed the results of an experiment that used a 2 x 2 factorial design. The lines appear to be nonparallel. Which is following statements is most likely true?

 One main effect was statistically significant but the other was not. The interaction effect was statistically significant. Neither the interaction effect nor the main effects were statistically significant. Both main effects were statistically significant.

## A factorial design that includes one independent-groups factor and one dependent-groups factor is called

 a floor-ceiling design an E x N design. a mixed factorial design. a Solomon four-group design.

## A 3 x 3 x 2 factorial design contains _____ possible interactions.

 3 4 8 18

## Which of the following is true regarding an ANOVA for a factorial design?

 ANOVA can only be used for an "all independent groups" design. ANOVA cannot be used if more than two independent variables are used. Only one F value will be computed. The larger the F values observed, the smaller the p values.

## When is a "simple-effects analysis" most likely to be used?

 When an experimenter finds a significant interaction effect. When an experimenter finds a non-significant interaction effect. When an experimenter finds a non-significant main effect. When an experimenter finds a significant main effect.