#1
What is the purpose of blinding in a research study?
To prevent experimenter bias and participant expectations
ExplanationMaintains objectivity by hiding information.
#2
What is the purpose of a control group in an experimental study?
To control for confounding variables
ExplanationEstablishes a baseline for comparison.
#3
Which type of sampling method involves selecting individuals who are easiest to reach or obtain?
Convenience sampling
ExplanationPrioritizes ease of access over randomness.
#4
What is the purpose of a research hypothesis?
To guide the research and make predictions about the outcomes
ExplanationDirects investigation by predicting results.
#5
What is the primary goal of random sampling in research?
To ensure that all individuals have an equal chance of being selected for the study
ExplanationAims for unbiased representation in the sample.
#6
What is the purpose of a pilot study in experimental research?
To test the feasibility of the research design
ExplanationAssesses if the research design is practical.
#7
Which of the following is an example of a quasi-experimental design?
Pre-test and post-test with a non-equivalent control group
ExplanationUtilizes comparison without random assignment.
#8
What is the difference between internal validity and external validity in research?
Internal validity refers to the accuracy of measurement, while external validity refers to the generalizability of the findings.
ExplanationInternal focuses on accuracy; external on applicability.
#9
Which of the following is a disadvantage of using a cross-sectional research design?
It is challenging to establish cause-and-effect relationships.
ExplanationLimits insight into causal relationships.
#10
What is the purpose of a null hypothesis in hypothesis testing?
To serve as a baseline for comparison
ExplanationActs as a starting point for statistical analysis.
#11
What is the purpose of random assignment in experimental design?
To ensure equal distribution of participants in each group
ExplanationPrevents bias by randomly allocating participants.
#12
In a factorial design with two factors, each with two levels, how many conditions or groups are there?
8
ExplanationEach factor level combination creates a condition.
#13
What is the purpose of a double-blind experiment?
To blind both the participants and the experimenters to the treatment conditions
ExplanationEliminates bias by concealing treatment.
#14
What is the primary advantage of using a within-subjects design in experimental research?
It controls for individual differences.
ExplanationMinimizes variability by using the same subjects.
#15
What is the purpose of a cross-over design in experimental research?
To minimize the impact of order effects in repeated-measures designs
ExplanationBalances sequence variations to reduce bias.