# The Psychologist As Detective An Introduction To Conducting Research In Psychology 6th Edition By Randolph – Test Bank

Multiple Choice Single Select

M/C Question 1

A well-designed research study with only one independent variable is ________ preferable to a poorly designed study with multiple independent variables.

a) vastly

b) somewhat

Consider This: The principle of parsimony encourages explaining phenomena simply until simple explanations are no longer valid. LO 11.1: Examine how experimental design works by building on the basic building block design

c) equally

Consider This: The principle of parsimony encourages explaining phenomena simply until simple explanations are no longer valid. LO 11.1: Examine how experimental design works by building on the basic building block design

d) not

Consider This: The principle of parsimony encourages explaining phenomena simply until simple explanations are no longer valid. LO 11.1: Examine how experimental design works by building on the basic building block design

ANS: a

Topic=Experimental Design: Adding to the Basic Building Block, Skill=Understand the Concepts, Objective=LO 11.1: Examine how experimental design works by building on the basic building block design, Difficulty=Easy

M/C Question 2

________ are differing types of an independent variable used in an experiment.

a) Levels

b) Power statistics

Consider This: These varying amounts are also known as treatment conditions. LO 11.1: Examine how experimental design works by building on the basic building block design

c) Confounds

Consider This: These varying amounts are also known as treatment conditions. LO 11.1: Examine how experimental design works by building on the basic building block design

d) Correlation coefficients

Consider This: These varying amounts are also known as treatment conditions. LO 11.1: Examine how experimental design works by building on the basic building block design

ANS: a

Skill=Understand the Concepts, Objective=LO 11.1: Examine how experimental design works by building on the basic building block design, Topic=Experimental Design: Adding to the Basic Building Block, Difficulty=Easy

M/C Question 3

In general, it is ________ for researchers to use more than five levels of the independent variable in a multiple-group design.

a) rare

b) common

Consider This: Increasing the number of levels would also involve increasing the sample size of participants. LO 11.1: Examine how experimental design works by building on the basic building block design

c) practical

Consider This: Increasing the number of levels would also involve increasing the sample size of participants. LO 11.1: Examine how experimental design works by building on the basic building block design

d) advantageous

Consider This: Increasing the number of levels would also involve increasing the sample size of participants. LO 11.1: Examine how experimental design works by building on the basic building block design

ANS: a

Skill=Understand the Concepts, Objective=LO 11.1: Examine how experimental design works by building on the basic building block design, Topic=Experimental Design: Adding to the Basic Building Block, Difficulty=Easy

M/C Question 4

An experimental method in which each participant has an equal chance of being assigned to any group is called

a) random assignment.

b) random selection.

Consider This: This method is used in independent-samples design. LO 11.1: Examine how experimental design works by building on the basic building block design

c) correlated-groups.

Consider This: This method is used in independent-samples design. LO 11.1: Examine how experimental design works by building on the basic building block design

d) correlation coefficient.

Consider This: This method is used in independent-samples design. LO 11.1: Examine how experimental design works by building on the basic building block design

ANS: a

Skill=Understand the Concepts, Objective=LO 11.1: Examine how experimental design works by building on the basic building block design, Topic=Experimental Design: Adding to the Basic Building Block, Difficulty=Easy

M/C Question 5

An example of a control procedure in a multiple-group design for independent samples would include

a) random assignment.

b) correlated samples.

Consider This: Control procedures are steps taken to ensure potential confounding variables are spread across levels of the independent variable. LO 11.1: Examine how experimental design works by building on the basic building block design

c) small sample sizes.

Consider This: Control procedures are steps taken to ensure potential confounding variables are spread across levels of the independent variable. LO 11.1: Examine how experimental design works by building on the basic building block design

d) extraneous variables.

Consider This: Control procedures are steps taken to ensure potential confounding variables are spread across levels of the independent variable. LO 11.1: Examine how experimental design works by building on the basic building block design

ANS: a

Skill=Understand the Concepts, Objective=LO 11.1: Examine how experimental design works by building on the basic building block design, Topic=Experimental Design: Adding to the Basic Building Block, Difficulty=Easy

M/C Question 6

A multiple-group design incorporates ________ in correlated samples.

a) matched sets

b) matched pairs

Consider This: Multiple groups have more than two levels of the independent variable. LO 11.1: Examine how experimental design works by building on the basic building block design

c) one independent variable level

Consider This: Multiple groups have more than two levels of the independent variable. LO 11.1: Examine how experimental design works by building on the basic building block design

d) two independent variable levels

Consider This: Multiple groups have more than two levels of the independent variable. LO 11.1: Examine how experimental design works by building on the basic building block design

ANS: a

Skill=Understand the Concepts, Objective=LO 11.1: Examine how experimental design works by building on the basic building block design, Topic=Experimental Design: Adding to the Basic Building Block, Difficulty=Easy

M/C Question 7

The general formula for a statistical test is statistic equals

a) between-groups variability over error variability.

b) error variability over between-groups variability.

Consider This: Reduced error variability in the denominator increases the statistical value and thus increases the ease of rejecting the null hypothesis. LO 11.1: Examine how experimental design works by building on the basic building block design

c) error variability over standard deviation.

Consider This: Reduced error variability in the denominator increases the statistical value and thus increases the ease of rejecting the null hypothesis. LO 11.1: Examine how experimental design works by building on the basic building block design

d) between-groups variability over standard deviation.

Consider This: Reduced error variability in the denominator increases the statistical value and thus increases the ease of rejecting the null hypothesis. LO 11.1: Examine how experimental design works by building on the basic building block design

ANS: a

Difficulty=Easy, Objective=LO 11.1: Examine how experimental design works by building on the basic building block design, Topic=Experimental Design: Adding to the Basic Building Block, Skill=Understand the Concepts

M/C Question 8

An experimental effect caused by participants’ expectations is a(n)

a) placebo effect.

b) statistically significant effect.

Consider This: Expectation or suggestion, not the manipulation of the independent variable, can exert an effect in an experiment. LO 11.1: Examine how experimental design works by building on the basic building block design

c) confounding variable.

Consider This: Expectation or suggestion, not the manipulation of the independent variable, can exert an effect in an experiment. LO 11.1: Examine how experimental design works by building on the basic building block design

d) independent variable.

Consider This: Expectation or suggestion, not the manipulation of the independent variable, can exert an effect in an experiment. LO 11.1: Examine how experimental design works by building on the basic building block design

ANS: a

Skill=Understand the Concepts, Objective=LO 11.1: Examine how experimental design works by building on the basic building block design, Topic=Experimental Design: Adding to the Basic Building Block, Difficulty=Easy

M/C Question 9

A statistical test used to analyze multiple-group mean differences is a

a) one-way ANOVA.

b) correlation coefficient.

Consider This: An analysis of variance tests reveals differences between means when the independent variable has three or more levels. LO 11.2: Use statistical tools to understand statistical data in psychological experiments

c) standard deviation.

Consider This: An analysis of variance tests reveals differences between means when the independent variable has three or more levels. LO 11.2: Use statistical tools to understand statistical data in psychological experiments

d) t test.

Consider This: An analysis of variance tests reveals differences between means when the independent variable has three or more levels. LO 11.2: Use statistical tools to understand statistical data in psychological experiments

ANS: a

Objective=LO 11.2: Use statistical tools to understand statistical data in psychological experiments, Topic=Statistical Analysis: What Do Your Data Show?, Difficulty=Easy, Skill=Understand the Concepts

M/C Question 10

The ___________ is the amount of variability in the dependent variable attributable to each source.

a) sum of squares

b) standard deviation

Consider This: To determine the source of different types of variation, the squared deviations around each mean are summed. LO 11.3: Interpret statistical data to come to logical conclusions in psychological experiments

c) mean square

Consider This: To determine the source of different types of variation, the squared deviations around each mean are summed. LO 11.3: Interpret statistical data to come to logical conclusions in psychological experiments

d) correlation coefficient

Consider This: To determine the source of different types of variation, the squared deviations around each mean are summed. LO 11.3: Interpret statistical data to come to logical conclusions in psychological experiments

ANS: a

Skill=Understand the Concepts, Objective=LO 11.3: Interpret statistical data to come to logical conclusions in psychological experiments, Topic=Interpretation: Making Sense of Your Statistics, Difficulty=Easy

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