Illinois Psychologist Licensing Examination
(EPPP) Practice Questions And Correct
Answers (Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
Professional Psychology, Ethics, Research, Assessment, Biological, Cognitive,
Social, Clinical, and Developmental Domains
1. Which neurotransmitter is primarily associated with mood regulation and
depression?
A. Dopamine
B. Serotonin
C. GABA
D. Norepinephrine
Rationale: Serotonin imbalance is strongly linked to mood disorders,
particularly depression.
,2. The concept of “object permanence” was introduced by which
developmental theorist?
A. Erik Erikson
B. Jean Piaget
C. Lev Vygotsky
D. B.F. Skinner
Rationale: Piaget identified object permanence as a key cognitive
milestone in the sensorimotor stage.
3. A psychologist’s primary ethical responsibility when conducting research
with human participants is to ensure:
A. Statistical accuracy
B. Informed consent
C. Institutional approval
D. Confidentiality
Rationale: Informed consent ensures participants understand the nature
and risks of participation.
4. The parasympathetic nervous system is primarily responsible for:
A. “Fight or flight” response
B. “Rest and digest” activities
C. Increasing heart rate
D. Releasing adrenaline
,Rationale: The parasympathetic system conserves energy and restores
bodily functions after stress.
5. In classical conditioning, a neutral stimulus becomes a conditioned
stimulus through:
A. Pairing with an unconditioned stimulus
B. Reinforcement
C. Punishment
D. Shaping
Rationale: Repeated pairing of a neutral stimulus with an unconditioned
stimulus produces a conditioned response.
6. Which of the following best defines reliability in psychological testing?
A. The test measures what it claims to measure
B. The test produces consistent results
C. The test correlates with external criteria
D. The test is easy to administer
Rationale: Reliability refers to the consistency of measurement results over
time or across raters.
7. According to Erikson, the primary psychosocial conflict in adolescence is:
y y y y y y y y y
A. Autonomy vs. shame
y y
, B. Initiative vs. guilt y y
C. Identity vs. role confusion
y y y
D. Intimacy vs. isolation y y
Rationale: Adolescents struggle to form a stable identity during this stage.
y y y y y y y y y y
8. A patient exhibits disorganized speech, delusions, and hallucinations. The
y y y y y y y y
most likely diagnosis is:
y y y y
A. Bipolar disorder y
B. Major depressive disorder
y y
C. Schizophrenia
D. PTSD
Rationale: Schizophrenia is characterized by psychotic symptoms including
y y y y y y y
y delusions and hallucinations.
y y
9. Which type of reinforcement schedule produces the highest resistance to
y y y y y y y y y
extinction?
y
A. Fixed ratio y
B. Fixed interval
y
C. Variable ratio y
D. Variable interval y
Rationale: Variable ratio schedules, such as gambling, produce strong,
y y y y y y y y
y persistent responding. y
(EPPP) Practice Questions And Correct
Answers (Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
Professional Psychology, Ethics, Research, Assessment, Biological, Cognitive,
Social, Clinical, and Developmental Domains
1. Which neurotransmitter is primarily associated with mood regulation and
depression?
A. Dopamine
B. Serotonin
C. GABA
D. Norepinephrine
Rationale: Serotonin imbalance is strongly linked to mood disorders,
particularly depression.
,2. The concept of “object permanence” was introduced by which
developmental theorist?
A. Erik Erikson
B. Jean Piaget
C. Lev Vygotsky
D. B.F. Skinner
Rationale: Piaget identified object permanence as a key cognitive
milestone in the sensorimotor stage.
3. A psychologist’s primary ethical responsibility when conducting research
with human participants is to ensure:
A. Statistical accuracy
B. Informed consent
C. Institutional approval
D. Confidentiality
Rationale: Informed consent ensures participants understand the nature
and risks of participation.
4. The parasympathetic nervous system is primarily responsible for:
A. “Fight or flight” response
B. “Rest and digest” activities
C. Increasing heart rate
D. Releasing adrenaline
,Rationale: The parasympathetic system conserves energy and restores
bodily functions after stress.
5. In classical conditioning, a neutral stimulus becomes a conditioned
stimulus through:
A. Pairing with an unconditioned stimulus
B. Reinforcement
C. Punishment
D. Shaping
Rationale: Repeated pairing of a neutral stimulus with an unconditioned
stimulus produces a conditioned response.
6. Which of the following best defines reliability in psychological testing?
A. The test measures what it claims to measure
B. The test produces consistent results
C. The test correlates with external criteria
D. The test is easy to administer
Rationale: Reliability refers to the consistency of measurement results over
time or across raters.
7. According to Erikson, the primary psychosocial conflict in adolescence is:
y y y y y y y y y
A. Autonomy vs. shame
y y
, B. Initiative vs. guilt y y
C. Identity vs. role confusion
y y y
D. Intimacy vs. isolation y y
Rationale: Adolescents struggle to form a stable identity during this stage.
y y y y y y y y y y
8. A patient exhibits disorganized speech, delusions, and hallucinations. The
y y y y y y y y
most likely diagnosis is:
y y y y
A. Bipolar disorder y
B. Major depressive disorder
y y
C. Schizophrenia
D. PTSD
Rationale: Schizophrenia is characterized by psychotic symptoms including
y y y y y y y
y delusions and hallucinations.
y y
9. Which type of reinforcement schedule produces the highest resistance to
y y y y y y y y y
extinction?
y
A. Fixed ratio y
B. Fixed interval
y
C. Variable ratio y
D. Variable interval y
Rationale: Variable ratio schedules, such as gambling, produce strong,
y y y y y y y y
y persistent responding. y
