AP PSYCHOLOGY 150 QUESTIONS
COMPREHENSIVE PRACTICE
EXAM ULTIMATE 2027 STUDY SET
AND RATIONALES
1. Dr. Aris is conducting a study to determine if a new
mindfulness application reduces cortisol levels in high school
students before an exam. He randomly assigns participants
to either use the application for 15 minutes or sit quietly for
15 minutes. In this study, the operational definition of the
dependent variable is:
A. The mindfulness application.
B. The level of stress felt by the students.
C. The measured cortisol levels in the students' saliva.
D. The 15-minute duration of the relaxation task.
CORRECT ANSWER: C
RATiONAlE: An operational definition specifies the exact,
measurable procedures used to quantify a variable. Cortisol
levels in the saliva provide a concrete, objective measurement of
the dependent variable (physiological stress reduction).
2. A neuroscientist is studying a patient who can understand
speech perfectly and speaks with fluent grammar, but the
words chosen are nonsensical and form a "word salad." For
example, the patient says, "The clock is bleeding blue chairs
on the grass." Which area of the brain is most likely
damaged?
, A. Broca's area
B. Wernicke's area
C. The primary motor cortex
D. The somatosensory cortex
CORRECT ANSWER: B
RATiONAlE: Wernicke's area, located in the left temporal
lobe, is responsible for language comprehension and meaningful
expression. Damage here results in fluent but meaningless
speech (receptive aphasia), unlike Broca's aphasia, which affects
speech production.
3. Sarah is at a loud, chaotic concert but can easily focus on her
friend's whisper right next to her while tuning out the blaring
music and shouting crowd. However, when someone across
the room shouts her name, her attention shifts immediately.
This phenomenon is best explained by:
A. Signal detection theory
B. The cocktail party effect
C. Inattentional blindness
D. Top-down sensory processing
CORRECT ANSWER: B
RATiONAlE: The cocktail party effect describes the brain's
ability to focus one's auditory attention on a specific stimulus
while filtering out a range of other stimuli, while still
unconsciously processing background information for
personally significant cues like one's own name.
4. A researcher wants to study the relationship between sleep
deprivation and GPA. Because she cannot ethically or
, practically force students to stay awake for weeks, she
collects self-reported data on average nightly sleep hours and
cumulative GPAs from 500 college students. She finds a
correlation coefficient of -0.65. What does this result
indicate?
A. Sleeping less causes students to achieve lower GPAs.
B. As hours of sleep decrease, student GPAs tend to increase.
C. As hours of sleep decrease, student GPAs tend to decrease.
D. There is a weak, negligible relationship between sleep and
GPA.
CORRECT ANSWER: B
RATiONAlE: A negative correlation coefficient means that as
one variable decreases, the other increases. Therefore, a negative
correlation of -0.65 indicates a moderate-to-strong inverse
relationship where fewer hours of sleep are associated with
higher GPAs (or vice versa).
5. During an action potential, the rapid depolarization of the
neuronal membrane is primarily caused by which of the
following ionic movements?
A. Sodium ions (Na+) rushing into the cell
B. Potassium ions (K+) rushing out of the cell
C. Chloride ions (Cl-) rushing into the cell
D. Neuromitters being reabsorbed by the axon terminal
CORRECT ANSWER: A
RATiONAlE: Depolarization occurs when voltage-gated
sodium channels open, allowing positively charged sodium ions
, to flood into the negatively charged interior of the axon, rapidly
driving the membrane potential upward.
6. While driving home at night, a deer suddenly leaps in front
of Chloe's car. She slams on the brakes, her heart races, her
pupils dilate, and her digestion slows down. Which branch of
the nervous system has been activated?
A. Parasympathetic nervous system
B. Somatic nervous system
C. Sympathetic nervous system
D. Central nervous system
CORRECT ANSWER: C
RATiONAlE: The sympathetic nervous system coordinates the
body's physiological "fight-or-flight" response to perceived
threats, increasing heart rate, dilating pupils, and diverting
energy away from non-essential functions like digestion.
7. An evolutionary psychologist would be most interested in
studying which of the following topics?
A. How childhood trauma alters the neurochemistry of the
amygdala.
B. Why specific phobias, such as fear of snakes or heights,
helped our ancestors survive.
C. The impact of localized cultural norms on collective
problem-solving skills.
D. Using cognitive-behavioral therapy to reframe
maladaptive thought patterns.
CORRECT ANSWER: B
RATiONAlE: Evolutionary psychology focuses on how
COMPREHENSIVE PRACTICE
EXAM ULTIMATE 2027 STUDY SET
AND RATIONALES
1. Dr. Aris is conducting a study to determine if a new
mindfulness application reduces cortisol levels in high school
students before an exam. He randomly assigns participants
to either use the application for 15 minutes or sit quietly for
15 minutes. In this study, the operational definition of the
dependent variable is:
A. The mindfulness application.
B. The level of stress felt by the students.
C. The measured cortisol levels in the students' saliva.
D. The 15-minute duration of the relaxation task.
CORRECT ANSWER: C
RATiONAlE: An operational definition specifies the exact,
measurable procedures used to quantify a variable. Cortisol
levels in the saliva provide a concrete, objective measurement of
the dependent variable (physiological stress reduction).
2. A neuroscientist is studying a patient who can understand
speech perfectly and speaks with fluent grammar, but the
words chosen are nonsensical and form a "word salad." For
example, the patient says, "The clock is bleeding blue chairs
on the grass." Which area of the brain is most likely
damaged?
, A. Broca's area
B. Wernicke's area
C. The primary motor cortex
D. The somatosensory cortex
CORRECT ANSWER: B
RATiONAlE: Wernicke's area, located in the left temporal
lobe, is responsible for language comprehension and meaningful
expression. Damage here results in fluent but meaningless
speech (receptive aphasia), unlike Broca's aphasia, which affects
speech production.
3. Sarah is at a loud, chaotic concert but can easily focus on her
friend's whisper right next to her while tuning out the blaring
music and shouting crowd. However, when someone across
the room shouts her name, her attention shifts immediately.
This phenomenon is best explained by:
A. Signal detection theory
B. The cocktail party effect
C. Inattentional blindness
D. Top-down sensory processing
CORRECT ANSWER: B
RATiONAlE: The cocktail party effect describes the brain's
ability to focus one's auditory attention on a specific stimulus
while filtering out a range of other stimuli, while still
unconsciously processing background information for
personally significant cues like one's own name.
4. A researcher wants to study the relationship between sleep
deprivation and GPA. Because she cannot ethically or
, practically force students to stay awake for weeks, she
collects self-reported data on average nightly sleep hours and
cumulative GPAs from 500 college students. She finds a
correlation coefficient of -0.65. What does this result
indicate?
A. Sleeping less causes students to achieve lower GPAs.
B. As hours of sleep decrease, student GPAs tend to increase.
C. As hours of sleep decrease, student GPAs tend to decrease.
D. There is a weak, negligible relationship between sleep and
GPA.
CORRECT ANSWER: B
RATiONAlE: A negative correlation coefficient means that as
one variable decreases, the other increases. Therefore, a negative
correlation of -0.65 indicates a moderate-to-strong inverse
relationship where fewer hours of sleep are associated with
higher GPAs (or vice versa).
5. During an action potential, the rapid depolarization of the
neuronal membrane is primarily caused by which of the
following ionic movements?
A. Sodium ions (Na+) rushing into the cell
B. Potassium ions (K+) rushing out of the cell
C. Chloride ions (Cl-) rushing into the cell
D. Neuromitters being reabsorbed by the axon terminal
CORRECT ANSWER: A
RATiONAlE: Depolarization occurs when voltage-gated
sodium channels open, allowing positively charged sodium ions
, to flood into the negatively charged interior of the axon, rapidly
driving the membrane potential upward.
6. While driving home at night, a deer suddenly leaps in front
of Chloe's car. She slams on the brakes, her heart races, her
pupils dilate, and her digestion slows down. Which branch of
the nervous system has been activated?
A. Parasympathetic nervous system
B. Somatic nervous system
C. Sympathetic nervous system
D. Central nervous system
CORRECT ANSWER: C
RATiONAlE: The sympathetic nervous system coordinates the
body's physiological "fight-or-flight" response to perceived
threats, increasing heart rate, dilating pupils, and diverting
energy away from non-essential functions like digestion.
7. An evolutionary psychologist would be most interested in
studying which of the following topics?
A. How childhood trauma alters the neurochemistry of the
amygdala.
B. Why specific phobias, such as fear of snakes or heights,
helped our ancestors survive.
C. The impact of localized cultural norms on collective
problem-solving skills.
D. Using cognitive-behavioral therapy to reframe
maladaptive thought patterns.
CORRECT ANSWER: B
RATiONAlE: Evolutionary psychology focuses on how
