PSYC 140 Modules 1–8 Practice Questions with
Explanations 2026/2027 Practice Exam
2026/2027 – Complete Exam-Style Questions
with Correct Answers & Detailed Rationales |
Verified & Reliable
Question 1
A psychologist wants to determine whether listening to
instrumental music while studying causes students to perform
differently on a subsequent memory test. Students are
randomly assigned either to study with instrumental music or in
silence, and all participants receive the same memory test.
Which feature of this design most directly supports a causal
conclusion?
A. The study uses a standardized memory test.
B. The participants complete the experiment in a laboratory.
C. The researcher randomly assigns participants to conditions.
D. The researcher measures participants' memory after
studying.
Correct answer: C. Random assignment
,Random assignment helps distribute preexisting participant
characteristics across experimental conditions, reducing
systematic differences between groups before the manipulation
occurs. Because the researcher also deliberately manipulates
the study environment, differences in subsequent performance
can more defensibly be attributed to that manipulation. A
standardized test can improve measurement consistency, and a
laboratory setting can increase experimental control, but
neither by itself establishes causation. Simply measuring
memory after studying also does not establish that the study
condition caused any observed difference.
Question 2
A researcher obtains a correlation of r = −0.82 between daily
stress ratings and average sleep duration. Which interpretation
is most appropriate?
A. Higher stress directly causes people to sleep less.
B. Lower stress directly causes people to sleep more.
C. Stress and sleep duration have a strong negative association.
D. Stress accounts for exactly 82% of differences in sleep
duration.
Correct answer: C. Stress and sleep duration have a strong
negative association.
,The correlation coefficient indicates both direction and strength
of a linear association. A value of −0.82 represents a strong
negative correlation: as stress ratings increase, sleep duration
tends to decrease. Correlation alone does not establish
causation because other variables may contribute to the
relationship and the direction of causation cannot be
determined from the correlation alone. Also, r = −0.82 does not
mean that stress explains exactly 82% of the variance; squaring
the correlation would produce r² = .6724, or approximately
67.2% of variance explained in a simple linear association.
Question 3
Which statement best illustrates the principle of
operationalization in psychological research?
A. Defining anxiety as an unpleasant emotional state
B. Defining anxiety as a score above a specified cutoff on a
validated anxiety questionnaire
C. Explaining anxiety using evolutionary theory
D. Predicting that anxiety will increase under stressful
conditions
Correct answer: B. Defining anxiety as a score above a
specified cutoff on a validated anxiety questionnaire
, Operationalization translates an abstract construct into a
measurable procedure or observable indicator. Anxiety is a
theoretical construct, whereas a specified questionnaire score
provides a concrete method for measuring it. A conceptual
definition describes what anxiety means but does not
necessarily establish how it will be measured. A theory explains
the construct, and a prediction is a hypothesis about
relationships between variables; neither is an operational
definition.
Question 4
A participant in a research study is told that participation is
voluntary, that they may withdraw without penalty, and that
their responses will be kept confidential. These procedures
primarily address which ethical principle?
A. Deception
B. Informed consent and protection of participants
C. Random assignment
D. Replication
Correct answer: B. Informed consent and protection of
participants
Ethical research requires participants to receive enough
information to make an informed decision about participation
Explanations 2026/2027 Practice Exam
2026/2027 – Complete Exam-Style Questions
with Correct Answers & Detailed Rationales |
Verified & Reliable
Question 1
A psychologist wants to determine whether listening to
instrumental music while studying causes students to perform
differently on a subsequent memory test. Students are
randomly assigned either to study with instrumental music or in
silence, and all participants receive the same memory test.
Which feature of this design most directly supports a causal
conclusion?
A. The study uses a standardized memory test.
B. The participants complete the experiment in a laboratory.
C. The researcher randomly assigns participants to conditions.
D. The researcher measures participants' memory after
studying.
Correct answer: C. Random assignment
,Random assignment helps distribute preexisting participant
characteristics across experimental conditions, reducing
systematic differences between groups before the manipulation
occurs. Because the researcher also deliberately manipulates
the study environment, differences in subsequent performance
can more defensibly be attributed to that manipulation. A
standardized test can improve measurement consistency, and a
laboratory setting can increase experimental control, but
neither by itself establishes causation. Simply measuring
memory after studying also does not establish that the study
condition caused any observed difference.
Question 2
A researcher obtains a correlation of r = −0.82 between daily
stress ratings and average sleep duration. Which interpretation
is most appropriate?
A. Higher stress directly causes people to sleep less.
B. Lower stress directly causes people to sleep more.
C. Stress and sleep duration have a strong negative association.
D. Stress accounts for exactly 82% of differences in sleep
duration.
Correct answer: C. Stress and sleep duration have a strong
negative association.
,The correlation coefficient indicates both direction and strength
of a linear association. A value of −0.82 represents a strong
negative correlation: as stress ratings increase, sleep duration
tends to decrease. Correlation alone does not establish
causation because other variables may contribute to the
relationship and the direction of causation cannot be
determined from the correlation alone. Also, r = −0.82 does not
mean that stress explains exactly 82% of the variance; squaring
the correlation would produce r² = .6724, or approximately
67.2% of variance explained in a simple linear association.
Question 3
Which statement best illustrates the principle of
operationalization in psychological research?
A. Defining anxiety as an unpleasant emotional state
B. Defining anxiety as a score above a specified cutoff on a
validated anxiety questionnaire
C. Explaining anxiety using evolutionary theory
D. Predicting that anxiety will increase under stressful
conditions
Correct answer: B. Defining anxiety as a score above a
specified cutoff on a validated anxiety questionnaire
, Operationalization translates an abstract construct into a
measurable procedure or observable indicator. Anxiety is a
theoretical construct, whereas a specified questionnaire score
provides a concrete method for measuring it. A conceptual
definition describes what anxiety means but does not
necessarily establish how it will be measured. A theory explains
the construct, and a prediction is a hypothesis about
relationships between variables; neither is an operational
definition.
Question 4
A participant in a research study is told that participation is
voluntary, that they may withdraw without penalty, and that
their responses will be kept confidential. These procedures
primarily address which ethical principle?
A. Deception
B. Informed consent and protection of participants
C. Random assignment
D. Replication
Correct answer: B. Informed consent and protection of
participants
Ethical research requires participants to receive enough
information to make an informed decision about participation
