#1
Which of the following is NOT a type of experimental design?
Mixed-methods design
ExplanationMixed-methods design combines qualitative and quantitative approaches.
#2
What is the purpose of a control group in an experiment?
To compare the experimental group with a group that receives no treatment
ExplanationControl group provides a baseline for comparison.
#3
Which of the following is NOT a type of sampling technique?
Regression sampling
ExplanationRegression sampling is not a recognized method.
#4
What is a placebo?
A treatment that has no therapeutic effect
ExplanationPlacebo serves as a control for psychological effects.
#5
What is the purpose of a hypothesis in an experiment?
To predict the outcome of the experiment
ExplanationHypothesis guides the research question.
#6
Which of the following is a measure of central tendency?
Median
ExplanationMedian represents the middle value in a dataset.
#7
What is the purpose of a research hypothesis?
To predict the outcome of the experiment
ExplanationHypothesis guides the research process.
#8
What is the independent variable?
The variable that is manipulated by the researcher
ExplanationIndependent variable is what the researcher changes.
#9
What is the purpose of random assignment in experimental design?
To reduce the likelihood of systematic bias or confounding variables
ExplanationRandom assignment ensures equal distribution of characteristics.
#10
What is the purpose of blinding in an experiment?
To prevent bias in the interpretation of results
ExplanationBlinding reduces subjective influences.
#11
What is the purpose of pilot testing in research?
To test the feasibility and reliability of research procedures
ExplanationPilot testing identifies potential issues before full-scale implementation.
#12
What is the difference between qualitative and quantitative research?
Quantitative research collects and analyzes numerical data, while qualitative research collects and analyzes non-numerical data
ExplanationQuantitative research deals with numbers; qualitative research focuses on qualities.
#13
What is the purpose of peer review in research?
To evaluate the quality and validity of research before publication
ExplanationPeer review ensures research credibility.
#14
Which of the following is NOT a type of research design?
Control design
ExplanationControl design is not a recognized research approach.
#15
What is a factorial design?
An experimental design with multiple independent variables
ExplanationFactorial design explores interactions between variables.
#16
What is the purpose of an Institutional Review Board (IRB)?
To review and approve research proposals involving human participants
ExplanationIRB protects participants' rights and welfare.
#17
What is a confounding variable in experimental design?
A variable that affects the dependent variable but is not the independent variable
ExplanationConfounding variables skew experimental results.
#18
What is the purpose of stratified sampling?
To ensure that each subgroup of the population is represented proportionally in the sample
ExplanationStratified sampling improves subgroup representation.