WGU C180 INTRODUCTION TO PSYCHOLOGY EXAM with
Questions and Answers/Plus a Rationale Updated 2026
A+/Instant Download PDF
EXAM COVERAGE
1. Research Methods and Scientific Thinking
2. Biological Foundations and Neuropsychology
3. Sensation and Perception
4. Learning Theories (Classical and Operant Conditioning)
5. Memory, Cognition, and Language
6. Lifespan Developmental Psychology
7. Personality Theories
8. Psychological Disorders and Therapeutic Approaches
9. Social Psychology and Attribution
1. A developmental psychologist wants to study whether early childhood bilingualism enhances
executive control function in later childhood. To ensure high internal validity and establish a
causal relationship, which of the following research designs must the investigator implement?
A. A cross-sectional survey comparing vocabulary scores of monolingual and bilingual ten-year-
olds.
B. A controlled experimental design randomly assigning monolingual children to either a
bilingual immersion training program or a control group, followed by post-testing.
C. A naturalistic observation tracking language switching behavior in bilingual households over
a five-year period.
, D. A correlational study measuring the association between the degree of bilingual exposure and
scores on a standardized matrix reasoning test.
CORRECT ANSWER : B
Rationale: Establishing strict causality requires an experimental design featuring random
assignment and active manipulation of the independent variable, which rules out confounding
background variables. Option B correctly identifies this experimental approach. Options A, C,
and D describe descriptive, observational, or correlational methods, which evaluate associations
or snapshots but inherently lack the manipulation and random assignment necessary to prove
definitive cause-and-effect.
2. A neuroscientist is investigating synaptic transmission in a patient suffering from severe motor
tremors and emotional dysregulation. Analysis reveals a localized deficit in an inhibitory
neurotransmitter heavily implicated in regulating anxiety, motor control, and cortical arousal.
Which specific chemical messenger is most likely deficient?
A. Acetylcholine
B. Dopamine
C. Gamma-aminobutyric acid (GABA)
D. Glutamate
CORRECT ANSWER : C
Rationale: GABA is the primary inhibitory neurotransmitter in the central nervous system,
critical for regulating neural excitability, controlling anxiety, and modulating movement. A
deficiency often results in overstimulation, anxiety, and tremors. Acetylcholine governs muscle
action and memory, dopamine drives reward and motor coordination, and glutamate is the
primary excitatory neurotransmitter.
3. During an fMRI brain-scanning session, a participant is exposed to sudden, threatening
emotional stimuli. The neuroimaging data reveals immediate, hyperactive metabolic spikes in a
specific almond-shaped cluster of subcortical nuclei known for orchestrating fear conditioning
and emotional appraisal. What is this structure?
A. Hippocampus
B. Thalamus
C. Hypothalamus
D. Amygdala
, CORRECT ANSWER : D
Rationale: The amygdala is the core limbic structure responsible for processing emotional
responses, particularly fear, aggression, and threat detection. The hippocampus is chiefly
involved in explicit memory consolidation, the thalamus acts as the brain's sensory relay station,
and the hypothalamus manages homeostatic functions like hunger, thirst, and body temperature.
4. A clinical neuropsychologist evaluates a stroke patient who can effortlessly produce fluid
speech, but the output is completely devoid of semantic meaning and grammatical coherence
("word salad"). Furthermore, the patient displays a striking inability to comprehend spoken or
written language directed at them. Damage is localized to which brain region?
A. Wernicke's area
B. Broca's area
C. Primary motor cortex
D. Occipital lobe
CORRECT ANSWER : A
Rationale: Wernicke's area, located in the posterior section of the superior temporal gyrus,
governs language comprehension; damage here produces fluent yet meaningless speech
(receptive aphasia). Broca's area handles speech production (expressive aphasia), the primary
motor cortex controls voluntary movement, and the occipital lobe processes visual data.
5. A psychophysiology student is studying the autonomic nervous system's response to acute stress.
When an individual encounters an unexpected predator, which specific neural branch and
corresponding physiological shift dominate the immediate survival reaction?
A. Parasympathetic branch, promoting visceral digestion and heart rate deceleration.
B. Sympathetic branch, initiating pupil dilation, bronchial expansion, and tachycardic
acceleration.
C. Somatic branch, activating voluntary skeletal muscle contractions to freeze in place.
D. Enteric branch, restricting systemic blood flow to shut down metabolic basal rates.
CORRECT ANSWER : B
Rationale: The sympathetic nervous system coordinates the classic fight-or-flight response,
mobilizing bodily resources through pupil dilation, increased respiration, and elevated heart
rate. The parasympathetic system handles rest-and-digest functions, the somatic system controls
, voluntary skeletal movements, and the enteric system manages gastrointestinal functions
autonomously.
6. In a classic psychophysics experiment, researchers systematically alter the physical intensity of a
tone to determine the absolute threshold of human hearing. By definition, this absolute threshold
represents the minimum stimulus intensity required for detection:
A. Exactly 10% of the time.
B. Exactly 50% of the time.
C. Exactly 90% of the time.
D. 100% of the absolute time without error.
CORRECT ANSWER : B
Rationale: Psychophysicists operationally define the absolute threshold as the minimum intensity
level at which a stimulus can be reliably detected by an observer on 50 percent of trials. Values
of 10% or 90% do not map onto the standard threshold convention, and 100% detection is
impossible due to biological neural noise.
7. A patient sustained a traumatic brain injury and now exhibits profound anterograde amnesia—
the complete inability to form new conscious, declarative memories. However, procedural motor
skills like learning a new mirror-tracing task remain intact. This neurological dissociation
demonstrates the distinct separation of:
A. Sensory memory versus working memory buffers.
B. Explicit (declarative) memory systems versus implicit (procedural) memory systems.
C. Episodic autobiographical tags versus semantic factual databases.
D. Iconic visual traces versus echoic auditory echoes.
CORRECT ANSWER : B
Rationale: Anterograde amnesia damages explicit memory storage (managed by the
hippocampus) while sparing implicit, non-declarative memory structures (like the basal ganglia
and cerebellum governing motor learning). Episodic and semantic systems are both
subcategories of explicit memory, whereas iconic and echoic systems represent sensory memory
tiers.
8. A cognitive psychologist presents participants with a list of words containing items like "bed,
rest, tired, wake, snooze," and later finds that participants falsely yet confidently recall hearing
the non-listed, highly associated word "sleep." This phenomenon is best explained by:
Questions and Answers/Plus a Rationale Updated 2026
A+/Instant Download PDF
EXAM COVERAGE
1. Research Methods and Scientific Thinking
2. Biological Foundations and Neuropsychology
3. Sensation and Perception
4. Learning Theories (Classical and Operant Conditioning)
5. Memory, Cognition, and Language
6. Lifespan Developmental Psychology
7. Personality Theories
8. Psychological Disorders and Therapeutic Approaches
9. Social Psychology and Attribution
1. A developmental psychologist wants to study whether early childhood bilingualism enhances
executive control function in later childhood. To ensure high internal validity and establish a
causal relationship, which of the following research designs must the investigator implement?
A. A cross-sectional survey comparing vocabulary scores of monolingual and bilingual ten-year-
olds.
B. A controlled experimental design randomly assigning monolingual children to either a
bilingual immersion training program or a control group, followed by post-testing.
C. A naturalistic observation tracking language switching behavior in bilingual households over
a five-year period.
, D. A correlational study measuring the association between the degree of bilingual exposure and
scores on a standardized matrix reasoning test.
CORRECT ANSWER : B
Rationale: Establishing strict causality requires an experimental design featuring random
assignment and active manipulation of the independent variable, which rules out confounding
background variables. Option B correctly identifies this experimental approach. Options A, C,
and D describe descriptive, observational, or correlational methods, which evaluate associations
or snapshots but inherently lack the manipulation and random assignment necessary to prove
definitive cause-and-effect.
2. A neuroscientist is investigating synaptic transmission in a patient suffering from severe motor
tremors and emotional dysregulation. Analysis reveals a localized deficit in an inhibitory
neurotransmitter heavily implicated in regulating anxiety, motor control, and cortical arousal.
Which specific chemical messenger is most likely deficient?
A. Acetylcholine
B. Dopamine
C. Gamma-aminobutyric acid (GABA)
D. Glutamate
CORRECT ANSWER : C
Rationale: GABA is the primary inhibitory neurotransmitter in the central nervous system,
critical for regulating neural excitability, controlling anxiety, and modulating movement. A
deficiency often results in overstimulation, anxiety, and tremors. Acetylcholine governs muscle
action and memory, dopamine drives reward and motor coordination, and glutamate is the
primary excitatory neurotransmitter.
3. During an fMRI brain-scanning session, a participant is exposed to sudden, threatening
emotional stimuli. The neuroimaging data reveals immediate, hyperactive metabolic spikes in a
specific almond-shaped cluster of subcortical nuclei known for orchestrating fear conditioning
and emotional appraisal. What is this structure?
A. Hippocampus
B. Thalamus
C. Hypothalamus
D. Amygdala
, CORRECT ANSWER : D
Rationale: The amygdala is the core limbic structure responsible for processing emotional
responses, particularly fear, aggression, and threat detection. The hippocampus is chiefly
involved in explicit memory consolidation, the thalamus acts as the brain's sensory relay station,
and the hypothalamus manages homeostatic functions like hunger, thirst, and body temperature.
4. A clinical neuropsychologist evaluates a stroke patient who can effortlessly produce fluid
speech, but the output is completely devoid of semantic meaning and grammatical coherence
("word salad"). Furthermore, the patient displays a striking inability to comprehend spoken or
written language directed at them. Damage is localized to which brain region?
A. Wernicke's area
B. Broca's area
C. Primary motor cortex
D. Occipital lobe
CORRECT ANSWER : A
Rationale: Wernicke's area, located in the posterior section of the superior temporal gyrus,
governs language comprehension; damage here produces fluent yet meaningless speech
(receptive aphasia). Broca's area handles speech production (expressive aphasia), the primary
motor cortex controls voluntary movement, and the occipital lobe processes visual data.
5. A psychophysiology student is studying the autonomic nervous system's response to acute stress.
When an individual encounters an unexpected predator, which specific neural branch and
corresponding physiological shift dominate the immediate survival reaction?
A. Parasympathetic branch, promoting visceral digestion and heart rate deceleration.
B. Sympathetic branch, initiating pupil dilation, bronchial expansion, and tachycardic
acceleration.
C. Somatic branch, activating voluntary skeletal muscle contractions to freeze in place.
D. Enteric branch, restricting systemic blood flow to shut down metabolic basal rates.
CORRECT ANSWER : B
Rationale: The sympathetic nervous system coordinates the classic fight-or-flight response,
mobilizing bodily resources through pupil dilation, increased respiration, and elevated heart
rate. The parasympathetic system handles rest-and-digest functions, the somatic system controls
, voluntary skeletal movements, and the enteric system manages gastrointestinal functions
autonomously.
6. In a classic psychophysics experiment, researchers systematically alter the physical intensity of a
tone to determine the absolute threshold of human hearing. By definition, this absolute threshold
represents the minimum stimulus intensity required for detection:
A. Exactly 10% of the time.
B. Exactly 50% of the time.
C. Exactly 90% of the time.
D. 100% of the absolute time without error.
CORRECT ANSWER : B
Rationale: Psychophysicists operationally define the absolute threshold as the minimum intensity
level at which a stimulus can be reliably detected by an observer on 50 percent of trials. Values
of 10% or 90% do not map onto the standard threshold convention, and 100% detection is
impossible due to biological neural noise.
7. A patient sustained a traumatic brain injury and now exhibits profound anterograde amnesia—
the complete inability to form new conscious, declarative memories. However, procedural motor
skills like learning a new mirror-tracing task remain intact. This neurological dissociation
demonstrates the distinct separation of:
A. Sensory memory versus working memory buffers.
B. Explicit (declarative) memory systems versus implicit (procedural) memory systems.
C. Episodic autobiographical tags versus semantic factual databases.
D. Iconic visual traces versus echoic auditory echoes.
CORRECT ANSWER : B
Rationale: Anterograde amnesia damages explicit memory storage (managed by the
hippocampus) while sparing implicit, non-declarative memory structures (like the basal ganglia
and cerebellum governing motor learning). Episodic and semantic systems are both
subcategories of explicit memory, whereas iconic and echoic systems represent sensory memory
tiers.
8. A cognitive psychologist presents participants with a list of words containing items like "bed,
rest, tired, wake, snooze," and later finds that participants falsely yet confidently recall hearing
the non-listed, highly associated word "sleep." This phenomenon is best explained by:
