PSYC 255 Experimental Research Methods questions and correct answers.pdf

PSYC 255 Experimental Research Methods,
Hypothesis Testing, Definitions &
Measurement Quiz | 15 Questions and
Answers | 2026 update - Liberty University




PSYC 255 Experimental Research Methods, Hypothesis Testing, Definitions &
Measurement Quiz
15 Questions and Answers | 2026 Update | Liberty University


Quiz Instructions:
• Total Questions: 15
• Time Allowed: 25 minutes
• Format: Multiple choice and true/false
• Passing Score: 100% (15/15 correct)
SECTION A: MULTIPLE CHOICE
.


1. What is the primary characteristic of experimental research?
A) Observation without manipulation
B) Manipulation of an independent variable and control of extraneous variables

, C) Use of surveys only
D) Use of archival data only
Correct Answer: B
Rationale: Experimental research involves manipulating an independent variable
and controlling extraneous variables to establish causation.


2. What is a "hypothesis" in experimental research?
A) A well-supported explanation
B) A testable prediction about the relationship between variables
C) A personal opinion
D) A research question
Correct Answer: B
Rationale: A hypothesis is a testable prediction about the relationship between
variables.


3. What is the "null hypothesis" (H₀)?
A) A prediction that there is a relationship between variables
B) A prediction that there is no relationship between variables
C) A proven theory
D) A research question
Correct Answer: B
Rationale: The null hypothesis states there is no relationship or difference
between variables.


4. What is the "alternative hypothesis" (H₁ or Hₐ)?
A) A prediction that there is no relationship between variables
B) A prediction that there is a relationship between variables