PSY 101 Introduction to Psychology
Comprehensive Examination 2026/2027
University Department of Psychology |
250 Questions and Answers With Rationales
Welcome to the PSY 101 Introduction to Psychology Comprehensive Examination for
the 2026/2027 Academic Year. This document contains 250 original, verified
questions spanning five core domains: Research Methods and Biological
Foundations; Cognitive Psychology: Sensation, Perception, and Memory;
Developmental and Social Psychology; Personality, Motivation, and Emotion; and
Psychological Disorders and Treatment.
Every question has been written originally to reinforce the official PSY 101
Introduction to Psychology Comprehensive Examination objectives, supporting
actual exam readiness, academic proficiency, and a durable command of
foundational behavioral science. Each item pairs a scientifically accurate
stem with four options and a concise rationale grounded in foundational
introductory psychology textbooks and current ethical and clinical guidance,
so the reasoning behind every correct option is transparent and instructive.
Work through each domain in sequence, record your results, and revisit the
rationales for any question you miss before sitting your actual exam. Good luck!
DOMAIN 1: RESEARCH METHODS AND BIOLOGICAL FOUNDATIONS (Questions 1-
50)
1. What error does hindsight bias introduce after an outcome is known?
A. Refusing to draw any conclusion from data
B. Preferring future predictions over past facts
C. The tendency to see the result as having been obvious all along
D. Overestimating how long a study will take
Correct Answer: C
Rationale: Once events resolve, memory quietly rewrites them as inevitable—the "knew-it-
all-along" effect that real science counters with advance prediction.
,2. A researcher claims her political predictions are far better than they actually are.
Which error is this?
A. Hindsight bias
B. Overconfidence
C. Illusory correlation
D. Random sampling error
Correct Answer: B
Rationale: People routinely overrate their own accuracy; tracking prediction records
against outcomes is the corrective.
3. Which statement describes confirmation bias?
A. Searching only for evidence that supports an existing belief
B. Changing beliefs whenever contrary data arrive
C. Refusing to form any hypothesis
D. Overestimating sample sizes
Correct Answer: A
Rationale: Beliefs filter attention: we hunt for "yeses" and ignore "noes," which is why
science demands adversarial attempts to disconfirm.
4. What is an operational definition?
A. A dictionary definition of a theory
B. A guess about a statistical outcome
C. A statement of the exact procedure used to measure or produce a variable
D. A summary of past research findings
Correct Answer: C
Rationale: Science requires variables stated as measurable operations—anxiety becomes
a scored scale, aggression becomes counted presses—so others can replicate the work.
5. In a study of whether sleep loss affects recall, what is the dependent variable?
A. Hours of sleep permitted
B. The age of the participants
C. The laboratory room used
D. Memory recall performance
Correct Answer: D
Rationale: The dependent variable is the measured outcome; sleep hours, manipulated by
the researcher, are the independent variable.
6. How does random assignment differ from random sampling?
A. Assignment places participants into conditions by chance; sampling selects who enters
the study from the population
B. The two terms describe the same procedure
C. Sampling balances groups; assignment selects populations
D. Neither involves chance in any way
Correct Answer: A
,Rationale: Random sampling supports generalizing to the population; random assignment,
within the experiment, balances confounds across conditions to isolate cause.
7. Ice cream sales and drowning rise together each summer. What explains this
correlation?
A. Ice cream consumption causes drowning
B. Drowning causes ice cream demand
C. A third variable—heat—drives both swimming and ice cream purchases
D. The correlation proves nothing exists
Correct Answer: C
Rationale: Correlation describes covariation, never causation; a lurking third variable
often carries both observed variables.
8. What feature separates a true experiment from a correlational study?
A. Use of a large number of participants
B. Manipulation of an independent variable with random assignment to conditions
C. Measurement of two naturally occurring variables
D. Reporting means for each group only
Correct Answer: B
Rationale: Only manipulation plus assignment licenses cause-and-effect claims;
correlational designs measure what naturally occurs together.
9. Why do rigorous studies use double-blind procedures?
A. To keep the data secret from the sponsor
B. To halve the cost of running the study
C. So neither participants nor researchers know who receives the real treatment,
preventing expectation effects
D. Because ethics boards forbid open designs
Correct Answer: C
Rationale: Beliefs move bodies and readings alike; blinding both sides removes the
placebo and observer-expectancy channels.
10. What does a statistically significant result mean?
A. The finding is large and important in daily life
B. The hypothesis has been proven true
C. The sample was perfectly representative
D. The observed difference is unlikely to have arisen by chance alone
Correct Answer: D
Rationale: Significance addresses probability, not importance: a tiny, real difference can
be significant while remaining practically trivial.
11. Which ethical duties frame research with human participants?
A. Informed consent, protection from harm, confidentiality, and a debriefing afterward
B. Deception in every study for realism
C. No need for consent if participants are students
, D. Sharing raw data with the public immediately
Correct Answer: A
Rationale: The Belmont Report and APA ethics code mandate informed consent, minimizing
harm, confidentiality, and debriefing to respect participant welfare.
12. What is the primary function of the myelin sheath?
A. To transmit signals directly to muscles
B. To insulate axons and speed neural transmission
C. To store neurotransmitters
D. To connect neurons to blood vessels
Correct Answer: B
Rationale: Myelin wraps around axons, acting as insulation that allows electrical impulses
to jump between nodes of Ranvier, dramatically speeding conduction.
13. Which neurotransmitter is most associated with reward, pleasure, and motor control?
A. Serotonin
B. Norepinephrine
C. Dopamine
D. Acetylcholine
Correct Answer: C
Rationale: Dopamine is central to the brain's reward system; its dysregulation is implicated
in addiction and Parkinson's disease.
14. The sympathetic nervous system is responsible for:
A. Rest and digest functions
B. Calming the body after stress
C. Fight-or-flight responses
D. Regulating only digestive processes
Correct Answer: C
Rationale: The sympathetic branch activates the body for action—increasing heart rate,
dilating pupils, and mobilizing energy.
15. Which brain structure is critical for memory formation and is named for its seahorse
shape?
A. Amygdala
B. Cerebellum
C. Hypothalamus
D. Hippocampus
Correct Answer: D
Rationale: The hippocampus is essential for consolidating short-term memories into long-
term storage; damage here impairs new learning.
16. The amygdala is most directly involved in:
A. Language production
B. Emotional processing, especially fear
Comprehensive Examination 2026/2027
University Department of Psychology |
250 Questions and Answers With Rationales
Welcome to the PSY 101 Introduction to Psychology Comprehensive Examination for
the 2026/2027 Academic Year. This document contains 250 original, verified
questions spanning five core domains: Research Methods and Biological
Foundations; Cognitive Psychology: Sensation, Perception, and Memory;
Developmental and Social Psychology; Personality, Motivation, and Emotion; and
Psychological Disorders and Treatment.
Every question has been written originally to reinforce the official PSY 101
Introduction to Psychology Comprehensive Examination objectives, supporting
actual exam readiness, academic proficiency, and a durable command of
foundational behavioral science. Each item pairs a scientifically accurate
stem with four options and a concise rationale grounded in foundational
introductory psychology textbooks and current ethical and clinical guidance,
so the reasoning behind every correct option is transparent and instructive.
Work through each domain in sequence, record your results, and revisit the
rationales for any question you miss before sitting your actual exam. Good luck!
DOMAIN 1: RESEARCH METHODS AND BIOLOGICAL FOUNDATIONS (Questions 1-
50)
1. What error does hindsight bias introduce after an outcome is known?
A. Refusing to draw any conclusion from data
B. Preferring future predictions over past facts
C. The tendency to see the result as having been obvious all along
D. Overestimating how long a study will take
Correct Answer: C
Rationale: Once events resolve, memory quietly rewrites them as inevitable—the "knew-it-
all-along" effect that real science counters with advance prediction.
,2. A researcher claims her political predictions are far better than they actually are.
Which error is this?
A. Hindsight bias
B. Overconfidence
C. Illusory correlation
D. Random sampling error
Correct Answer: B
Rationale: People routinely overrate their own accuracy; tracking prediction records
against outcomes is the corrective.
3. Which statement describes confirmation bias?
A. Searching only for evidence that supports an existing belief
B. Changing beliefs whenever contrary data arrive
C. Refusing to form any hypothesis
D. Overestimating sample sizes
Correct Answer: A
Rationale: Beliefs filter attention: we hunt for "yeses" and ignore "noes," which is why
science demands adversarial attempts to disconfirm.
4. What is an operational definition?
A. A dictionary definition of a theory
B. A guess about a statistical outcome
C. A statement of the exact procedure used to measure or produce a variable
D. A summary of past research findings
Correct Answer: C
Rationale: Science requires variables stated as measurable operations—anxiety becomes
a scored scale, aggression becomes counted presses—so others can replicate the work.
5. In a study of whether sleep loss affects recall, what is the dependent variable?
A. Hours of sleep permitted
B. The age of the participants
C. The laboratory room used
D. Memory recall performance
Correct Answer: D
Rationale: The dependent variable is the measured outcome; sleep hours, manipulated by
the researcher, are the independent variable.
6. How does random assignment differ from random sampling?
A. Assignment places participants into conditions by chance; sampling selects who enters
the study from the population
B. The two terms describe the same procedure
C. Sampling balances groups; assignment selects populations
D. Neither involves chance in any way
Correct Answer: A
,Rationale: Random sampling supports generalizing to the population; random assignment,
within the experiment, balances confounds across conditions to isolate cause.
7. Ice cream sales and drowning rise together each summer. What explains this
correlation?
A. Ice cream consumption causes drowning
B. Drowning causes ice cream demand
C. A third variable—heat—drives both swimming and ice cream purchases
D. The correlation proves nothing exists
Correct Answer: C
Rationale: Correlation describes covariation, never causation; a lurking third variable
often carries both observed variables.
8. What feature separates a true experiment from a correlational study?
A. Use of a large number of participants
B. Manipulation of an independent variable with random assignment to conditions
C. Measurement of two naturally occurring variables
D. Reporting means for each group only
Correct Answer: B
Rationale: Only manipulation plus assignment licenses cause-and-effect claims;
correlational designs measure what naturally occurs together.
9. Why do rigorous studies use double-blind procedures?
A. To keep the data secret from the sponsor
B. To halve the cost of running the study
C. So neither participants nor researchers know who receives the real treatment,
preventing expectation effects
D. Because ethics boards forbid open designs
Correct Answer: C
Rationale: Beliefs move bodies and readings alike; blinding both sides removes the
placebo and observer-expectancy channels.
10. What does a statistically significant result mean?
A. The finding is large and important in daily life
B. The hypothesis has been proven true
C. The sample was perfectly representative
D. The observed difference is unlikely to have arisen by chance alone
Correct Answer: D
Rationale: Significance addresses probability, not importance: a tiny, real difference can
be significant while remaining practically trivial.
11. Which ethical duties frame research with human participants?
A. Informed consent, protection from harm, confidentiality, and a debriefing afterward
B. Deception in every study for realism
C. No need for consent if participants are students
, D. Sharing raw data with the public immediately
Correct Answer: A
Rationale: The Belmont Report and APA ethics code mandate informed consent, minimizing
harm, confidentiality, and debriefing to respect participant welfare.
12. What is the primary function of the myelin sheath?
A. To transmit signals directly to muscles
B. To insulate axons and speed neural transmission
C. To store neurotransmitters
D. To connect neurons to blood vessels
Correct Answer: B
Rationale: Myelin wraps around axons, acting as insulation that allows electrical impulses
to jump between nodes of Ranvier, dramatically speeding conduction.
13. Which neurotransmitter is most associated with reward, pleasure, and motor control?
A. Serotonin
B. Norepinephrine
C. Dopamine
D. Acetylcholine
Correct Answer: C
Rationale: Dopamine is central to the brain's reward system; its dysregulation is implicated
in addiction and Parkinson's disease.
14. The sympathetic nervous system is responsible for:
A. Rest and digest functions
B. Calming the body after stress
C. Fight-or-flight responses
D. Regulating only digestive processes
Correct Answer: C
Rationale: The sympathetic branch activates the body for action—increasing heart rate,
dilating pupils, and mobilizing energy.
15. Which brain structure is critical for memory formation and is named for its seahorse
shape?
A. Amygdala
B. Cerebellum
C. Hypothalamus
D. Hippocampus
Correct Answer: D
Rationale: The hippocampus is essential for consolidating short-term memories into long-
term storage; damage here impairs new learning.
16. The amygdala is most directly involved in:
A. Language production
B. Emotional processing, especially fear
