Multiple Choice Practice Examination Questions

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Chapter 10

This activity contains 10 questions.

The one-group posttest-only design, the one-group pretest-posttest design and the nonequivalent posttest-only design have in common

The fact that they are more typically used in animal versus human research The fact that they are more typically used by research in applied areas The fact that they do not control for threats to internal validity Their frequent use by research psychologists

A control group is needed

To control for experimenter expectancy effects To control for some rival hypotheses To serve as a comparison Both a and b are correct

The between- and within-participants designs are distinguished on the basis of

The number of independent variables they can test Whether the various treatment combinations use different or the same participants Whether they can test for the effect of an interaction The number of main effects they can test

If I have studied the effect that three dosages, 5mg, 10mg and 15mg, of the drug Prozac has on depressed people and people with an eating disorder and find that the lower dosages are most effective with people with eating disorders and the higher dosages are most effective with people with depression, I have identified

A main effect of drug dosage A main effect of both drug dosage and type of disorder A main effect of type of disorder An interaction between the drug dosage and the type of disorder

If I have conducted an experiment that requires me to randomly assign 20 participants to two levels of one independent variable and then all of these 20 participants take all three levels of a second independent variable, I have used what type of design

Factorial design based on a mixed model Pretest-posttest after only design Within-participants posttest-only design Factorial design

Ten people state that they have a headache at 2:00 P.M. and are given aspirin. At 5:00 P.M. they are asked if they have a headache. They all report they do not. The conclusion that aspirin relieves headache is based upon which type of research design?

One group pretest-posttest Pretest-posttest after only Factorial Mixed model factorial design

Which of the following is required of a good research design?

The design must have internal validity The design must be statistically significance The design must prove the research question The design must be external valid

The simple randomized participants design uses

several levels of one independent variable. more than one independent variable. several levels of several independent variables. only one level of the independent variable.

A Factorial Design permits one to test what types of effects that a pretest-posttest design does not.

Interaction Effects Main Effects Maturation Effects Regression Effects

Factorial designs have which of the following advantages?

Multiple hypotheses can be tested All of the above One had the ability to study interactive effects of independent variables One can build confounding variables into the design

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