PSYC 255 NON-EXPERIMENTAL RESEARCH METHODS &
VARIABLES QUIZ | 100 QUESTIONS & ANSWERS | 2026
UPDATED - LIBERTY UNIVERSITY
CORE DOMAINS
• Foundations of Scientific Inquiry and Research
• Variables and Operational Definitions
• Research Questions, Hypotheses, and Predictions
• Measurement Scales and Psychometrics
• Reliability and Validity in Research
• Correlational Research Design and Analysis
• Survey Research Methods
• Observational and Archival Research Methods
• Qualitative Research Approaches
• Ethical Considerations in Non-Experimental Research
INTRODUCTION
This comprehensive examination is designed to evaluate the psychology student's
mastery of non-experimental research methods and variables as outlined in the
PSYC 255 curriculum at Liberty University. It assesses foundational knowledge of
scientific inquiry, variable classification, measurement, reliability, validity, and
non-experimental research designs including correlational, survey, observational,
and qualitative approaches. The exam employs multiple-choice and scenario-
based questions to test critical thinking, application of research concepts, and
decision-making in real-world psychological research. Emphasis is placed on
understanding how to formulate research questions, select appropriate designs,
evaluate measurement quality, and adhere to ethical standards. This assessment
prepares students for advanced research courses and evidence-based practice.
,SECTION ONE: QUESTIONS 1–50
1. What is the primary characteristic that distinguishes non-experimental
research from experimental research?
A. Non-experimental research uses random assignment.
B. Non-experimental research does not involve manipulation of the independent
variable.
Correct answer
C. Non-experimental research always uses qualitative data.
D. Non-experimental research cannot establish relationships between variables.
RATIONALE: The defining feature of non-experimental research is that the
researcher does not manipulate the independent variable. Instead, variables are
measured as they naturally occur. Random assignment (A) is a feature of
experimental research. Non-experimental research can use quantitative or
qualitative data (C). It can establish relationships, though it cannot establish
causation (D).
2. A researcher measures the relationship between hours of sleep and academic
performance without manipulating either variable. What type of research is
this?
A. Experimental research
B. Correlational research
Correct answer
C. Quasi-experimental research
D. Longitudinal research
RATIONALE: Correlational research examines the relationship between two or
more variables without manipulation. Experimental research (A) involves
manipulation. Quasi-experimental research (C) involves manipulation without
random assignment. Longitudinal research (D) refers to a time frame, not a design
type.
3. What is a variable in psychological research?
A. A fixed characteristic that does not change
,B. Any characteristic or attribute that can vary across individuals or situations
Correct answer
C. A type of statistical test
D. A research question
RATIONALE: A variable is any characteristic or attribute that can vary or take
on different values. A constant (A) does not vary. Statistical tests (C) and research
questions (D) are separate concepts.
4. What is an independent variable?
A. The variable that is measured or observed
B. The variable that is manipulated or used to predict outcomes
Correct answer
C. A variable that is held constant
D. A variable that is extraneous
RATIONALE: In non-experimental research, the independent variable is the
predictor variable—the one thought to influence or predict the dependent
variable. In experimental research, it is manipulated. The dependent variable (A)
is the outcome. Control variables (C) are held constant. Extraneous variables (D)
are uncontrolled.
5. What is a dependent variable?
A. The variable that is manipulated by the researcher
B. The variable that is measured or observed as an outcome
Correct answer
C. A variable that is held constant
D. A confounding variable
RATIONALE: The dependent variable is the outcome variable that is measured
or observed. It is presumed to depend on the independent variable. The
independent variable (A) is the predictor. Control variables (C) are held constant.
6. What is an operational definition?
A. A general definition of a concept
B. A clear, specific, and measurable definition of a variable
Correct answer
, C. A theoretical definition of a construct
D. A dictionary definition of a term
RATIONALE: An operational definition specifies how a variable will be
measured or manipulated in a study. It makes the variable measurable and
observable. A general definition (A) is not specific enough. A theoretical definition
(C) describes the construct but does not specify measurement.
7. What is the difference between a construct and a variable?
A. A construct is a theoretical concept; a variable is a measurable representation
of that concept
Correct answer
B. A construct is measurable; a variable is theoretical
C. Constructs and variables are the same
D. Constructs are only used in experimental research
RATIONALE: A construct is an abstract theoretical concept (e.g., intelligence,
anxiety). A variable is the measurable representation of that construct. They are
not the same (C). Constructs are used in all research (D).
8. Which scale of measurement has a true zero point?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
Correct answer
RATIONALE: Ratio scales have all the properties of interval scales plus a true
zero point, allowing for meaningful ratios (e.g., weight, height, reaction time).
Interval scales lack a true zero.
9. Which scale of measurement involves categories with no inherent order?
A. Nominal
Correct answer
B. Ordinal
C. Interval
D. Ratio
VARIABLES QUIZ | 100 QUESTIONS & ANSWERS | 2026
UPDATED - LIBERTY UNIVERSITY
CORE DOMAINS
• Foundations of Scientific Inquiry and Research
• Variables and Operational Definitions
• Research Questions, Hypotheses, and Predictions
• Measurement Scales and Psychometrics
• Reliability and Validity in Research
• Correlational Research Design and Analysis
• Survey Research Methods
• Observational and Archival Research Methods
• Qualitative Research Approaches
• Ethical Considerations in Non-Experimental Research
INTRODUCTION
This comprehensive examination is designed to evaluate the psychology student's
mastery of non-experimental research methods and variables as outlined in the
PSYC 255 curriculum at Liberty University. It assesses foundational knowledge of
scientific inquiry, variable classification, measurement, reliability, validity, and
non-experimental research designs including correlational, survey, observational,
and qualitative approaches. The exam employs multiple-choice and scenario-
based questions to test critical thinking, application of research concepts, and
decision-making in real-world psychological research. Emphasis is placed on
understanding how to formulate research questions, select appropriate designs,
evaluate measurement quality, and adhere to ethical standards. This assessment
prepares students for advanced research courses and evidence-based practice.
,SECTION ONE: QUESTIONS 1–50
1. What is the primary characteristic that distinguishes non-experimental
research from experimental research?
A. Non-experimental research uses random assignment.
B. Non-experimental research does not involve manipulation of the independent
variable.
Correct answer
C. Non-experimental research always uses qualitative data.
D. Non-experimental research cannot establish relationships between variables.
RATIONALE: The defining feature of non-experimental research is that the
researcher does not manipulate the independent variable. Instead, variables are
measured as they naturally occur. Random assignment (A) is a feature of
experimental research. Non-experimental research can use quantitative or
qualitative data (C). It can establish relationships, though it cannot establish
causation (D).
2. A researcher measures the relationship between hours of sleep and academic
performance without manipulating either variable. What type of research is
this?
A. Experimental research
B. Correlational research
Correct answer
C. Quasi-experimental research
D. Longitudinal research
RATIONALE: Correlational research examines the relationship between two or
more variables without manipulation. Experimental research (A) involves
manipulation. Quasi-experimental research (C) involves manipulation without
random assignment. Longitudinal research (D) refers to a time frame, not a design
type.
3. What is a variable in psychological research?
A. A fixed characteristic that does not change
,B. Any characteristic or attribute that can vary across individuals or situations
Correct answer
C. A type of statistical test
D. A research question
RATIONALE: A variable is any characteristic or attribute that can vary or take
on different values. A constant (A) does not vary. Statistical tests (C) and research
questions (D) are separate concepts.
4. What is an independent variable?
A. The variable that is measured or observed
B. The variable that is manipulated or used to predict outcomes
Correct answer
C. A variable that is held constant
D. A variable that is extraneous
RATIONALE: In non-experimental research, the independent variable is the
predictor variable—the one thought to influence or predict the dependent
variable. In experimental research, it is manipulated. The dependent variable (A)
is the outcome. Control variables (C) are held constant. Extraneous variables (D)
are uncontrolled.
5. What is a dependent variable?
A. The variable that is manipulated by the researcher
B. The variable that is measured or observed as an outcome
Correct answer
C. A variable that is held constant
D. A confounding variable
RATIONALE: The dependent variable is the outcome variable that is measured
or observed. It is presumed to depend on the independent variable. The
independent variable (A) is the predictor. Control variables (C) are held constant.
6. What is an operational definition?
A. A general definition of a concept
B. A clear, specific, and measurable definition of a variable
Correct answer
, C. A theoretical definition of a construct
D. A dictionary definition of a term
RATIONALE: An operational definition specifies how a variable will be
measured or manipulated in a study. It makes the variable measurable and
observable. A general definition (A) is not specific enough. A theoretical definition
(C) describes the construct but does not specify measurement.
7. What is the difference between a construct and a variable?
A. A construct is a theoretical concept; a variable is a measurable representation
of that concept
Correct answer
B. A construct is measurable; a variable is theoretical
C. Constructs and variables are the same
D. Constructs are only used in experimental research
RATIONALE: A construct is an abstract theoretical concept (e.g., intelligence,
anxiety). A variable is the measurable representation of that construct. They are
not the same (C). Constructs are used in all research (D).
8. Which scale of measurement has a true zero point?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
Correct answer
RATIONALE: Ratio scales have all the properties of interval scales plus a true
zero point, allowing for meaningful ratios (e.g., weight, height, reaction time).
Interval scales lack a true zero.
9. Which scale of measurement involves categories with no inherent order?
A. Nominal
Correct answer
B. Ordinal
C. Interval
D. Ratio
