CALIFORNIA STATE UNIVERSITY
PSYCHOLOGY 101 EXAM 2026 PRACTICE
QUESTIONS WITH ANSWERS ORIGINAL
QUESTIONS, DETAILED RATIONALES &
STUDY GUIDE
1. Which statement best describes the primary goal of psychology as
a scientific discipline?
A. To diagnose and treat all forms of mental illness
B. To understand behavior and mental processes through systematic
scientific investigation
C. To prove that human behavior is determined entirely by biology
D. To predict every individual's future behavior with complete accuracy
Answer: B. To understand behavior and mental processes through
systematic scientific investigation
Rationale: Psychology is the scientific study of behavior and mental
processes. Psychologists investigate how biological, psychological, and
environmental factors influence thoughts, emotions, and actions.
Although clinical psychology involves assessment and treatment,
psychology as a discipline is much broader and includes research into
learning, memory, development, social behavior, neuroscience,
personality, and many other areas.
2. A researcher observes students' study behaviors without
manipulating any variables. Which research method is most directly
represented?
A. Naturalistic observation
B. Experimental research
1
,C. Double-blind experimentation
D. Randomized clinical trial
Answer: A. Naturalistic observation
Rationale: Naturalistic observation involves systematically observing
behavior in its normal environment without deliberately manipulating
variables. An experiment, by contrast, requires manipulation of an
independent variable and measurement of its effects on a dependent
variable. Naturalistic observation can provide realistic behavioral
information but generally cannot establish cause-and-effect
relationships by itself.
3. A psychologist wants to determine whether sleep deprivation
causes poorer memory performance. Which design would provide
the strongest evidence for causation?
A. Correlational study
B. Case study
C. Controlled experiment
D. Naturalistic observation
Answer: C. Controlled experiment
Rationale: A controlled experiment allows the researcher to
manipulate sleep deprivation as the independent variable and measure
memory as the dependent variable while controlling other relevant
factors. Random assignment can help distribute individual differences
across groups. If properly designed, an experiment provides
substantially stronger evidence for a causal relationship than
correlational or observational research.
4. A correlation coefficient of -0.85 between hours of social-media
use and hours of sleep would indicate which relationship?
2
,A. A strong positive relationship
B. A weak negative relationship
C. A strong negative relationship
D. No relationship
Answer: C. A strong negative relationship
Rationale: Correlation coefficients range from -1.00 to +1.00. A
coefficient close to -1.00 indicates a strong inverse relationship: as one
variable increases, the other tends to decrease. A coefficient of -0.85
therefore indicates a strong negative correlation. However, correlation
alone does not establish that social-media use causes reduced sleep.
5. Why is random assignment particularly important in a
psychological experiment?
A. It guarantees that the hypothesis will be supported
B. It eliminates the need for statistical analysis
C. It helps distribute participant characteristics across experimental
groups
D. It ensures that participants behave naturally
Answer: C. It helps distribute participant characteristics across
experimental groups
Rationale: Random assignment helps reduce systematic differences
between experimental groups before the manipulation occurs. For
example, personality, prior knowledge, motivation, and other
individual characteristics are more likely to be distributed
approximately evenly. This strengthens internal validity and makes
differences in outcomes more plausibly attributable to the independent
variable.
3
, 6. Which part of a neuron primarily receives incoming signals from
other neurons?
A. Axon
B. Myelin sheath
C. Dendrites
D. Terminal buttons
Answer: C. Dendrites
Rationale: Dendrites are branching structures that typically receive
incoming information from other neurons. The cell body integrates
information, the axon carries electrical impulses away from the cell
body, and terminal buttons release neurotransmitters into the synaptic
gap. The myelin sheath helps insulate many axons and increases the
speed of neural transmission.
7. What happens when an action potential reaches the terminal
buttons of a neuron?
A. The neuron's DNA is replicated
B. Neurotransmitters may be released into the synaptic cleft
C. The dendrites permanently shut down
D. The neuron immediately dies
Answer: B. Neurotransmitters may be released into the synaptic
cleft
Rationale: When an action potential reaches the axon terminal, it can
trigger the release of neurotransmitters from synaptic vesicles. These
chemical messengers cross the synaptic cleft and bind to receptors on
another neuron or target cell. The receiving cell's response depends on
the neurotransmitter and receptor involved.
4
PSYCHOLOGY 101 EXAM 2026 PRACTICE
QUESTIONS WITH ANSWERS ORIGINAL
QUESTIONS, DETAILED RATIONALES &
STUDY GUIDE
1. Which statement best describes the primary goal of psychology as
a scientific discipline?
A. To diagnose and treat all forms of mental illness
B. To understand behavior and mental processes through systematic
scientific investigation
C. To prove that human behavior is determined entirely by biology
D. To predict every individual's future behavior with complete accuracy
Answer: B. To understand behavior and mental processes through
systematic scientific investigation
Rationale: Psychology is the scientific study of behavior and mental
processes. Psychologists investigate how biological, psychological, and
environmental factors influence thoughts, emotions, and actions.
Although clinical psychology involves assessment and treatment,
psychology as a discipline is much broader and includes research into
learning, memory, development, social behavior, neuroscience,
personality, and many other areas.
2. A researcher observes students' study behaviors without
manipulating any variables. Which research method is most directly
represented?
A. Naturalistic observation
B. Experimental research
1
,C. Double-blind experimentation
D. Randomized clinical trial
Answer: A. Naturalistic observation
Rationale: Naturalistic observation involves systematically observing
behavior in its normal environment without deliberately manipulating
variables. An experiment, by contrast, requires manipulation of an
independent variable and measurement of its effects on a dependent
variable. Naturalistic observation can provide realistic behavioral
information but generally cannot establish cause-and-effect
relationships by itself.
3. A psychologist wants to determine whether sleep deprivation
causes poorer memory performance. Which design would provide
the strongest evidence for causation?
A. Correlational study
B. Case study
C. Controlled experiment
D. Naturalistic observation
Answer: C. Controlled experiment
Rationale: A controlled experiment allows the researcher to
manipulate sleep deprivation as the independent variable and measure
memory as the dependent variable while controlling other relevant
factors. Random assignment can help distribute individual differences
across groups. If properly designed, an experiment provides
substantially stronger evidence for a causal relationship than
correlational or observational research.
4. A correlation coefficient of -0.85 between hours of social-media
use and hours of sleep would indicate which relationship?
2
,A. A strong positive relationship
B. A weak negative relationship
C. A strong negative relationship
D. No relationship
Answer: C. A strong negative relationship
Rationale: Correlation coefficients range from -1.00 to +1.00. A
coefficient close to -1.00 indicates a strong inverse relationship: as one
variable increases, the other tends to decrease. A coefficient of -0.85
therefore indicates a strong negative correlation. However, correlation
alone does not establish that social-media use causes reduced sleep.
5. Why is random assignment particularly important in a
psychological experiment?
A. It guarantees that the hypothesis will be supported
B. It eliminates the need for statistical analysis
C. It helps distribute participant characteristics across experimental
groups
D. It ensures that participants behave naturally
Answer: C. It helps distribute participant characteristics across
experimental groups
Rationale: Random assignment helps reduce systematic differences
between experimental groups before the manipulation occurs. For
example, personality, prior knowledge, motivation, and other
individual characteristics are more likely to be distributed
approximately evenly. This strengthens internal validity and makes
differences in outcomes more plausibly attributable to the independent
variable.
3
, 6. Which part of a neuron primarily receives incoming signals from
other neurons?
A. Axon
B. Myelin sheath
C. Dendrites
D. Terminal buttons
Answer: C. Dendrites
Rationale: Dendrites are branching structures that typically receive
incoming information from other neurons. The cell body integrates
information, the axon carries electrical impulses away from the cell
body, and terminal buttons release neurotransmitters into the synaptic
gap. The myelin sheath helps insulate many axons and increases the
speed of neural transmission.
7. What happens when an action potential reaches the terminal
buttons of a neuron?
A. The neuron's DNA is replicated
B. Neurotransmitters may be released into the synaptic cleft
C. The dendrites permanently shut down
D. The neuron immediately dies
Answer: B. Neurotransmitters may be released into the synaptic
cleft
Rationale: When an action potential reaches the axon terminal, it can
trigger the release of neurotransmitters from synaptic vesicles. These
chemical messengers cross the synaptic cleft and bind to receptors on
another neuron or target cell. The receiving cell's response depends on
the neurotransmitter and receptor involved.
4
