#1
Which of the following is a characteristic of experimental research?
It involves observing behavior in a natural setting.
It aims to establish cause-and-effect relationships.
It relies on self-report measures.
It primarily uses correlational analysis.
#2
What is the independent variable in an experiment?
The variable that is manipulated by the researcher.
The variable that is measured and observed.
The variable that remains constant throughout the experiment.
The variable that changes as a result of the manipulation.
#3
What is the purpose of a pilot study in experimental research?
To test the feasibility of the study procedures.
To obtain preliminary data for the main study.
To validate the statistical analysis plan.
To recruit participants for the main study.
#4
Which of the following is a characteristic of a cross-sectional study?
It follows the same individuals over a long period of time.
It examines different groups of individuals at a single point in time.
It assesses changes in behavior before and after an intervention.
It measures the relationship between two variables.
#5
What is the purpose of a control group in experimental research?
To manipulate the independent variable.
To serve as a baseline for comparison.
To ensure that participants are similar across conditions.
To eliminate participant bias.
#6
Which of the following is a measure of central tendency?
Standard deviation
Variance
Mean
Correlation coefficient
#7
Which of the following is a measure of variability?
#8
Which of the following is an example of a quasi-experimental design?
Randomized controlled trial
Case study
Cross-sectional study
Pretest-posttest design without a control group
#9
What is a confounding variable in an experiment?
A variable that the researcher is not interested in.
A variable that directly influences the dependent variable.
A variable that systematically varies with the independent variable.
A variable that remains constant throughout the experiment.
#10
What is the purpose of random assignment in experimental research?
To ensure that participants are similar across conditions.
To increase the external validity of the study.
To eliminate the need for a control group.
To reduce the likelihood of systematic differences between groups.
#11
Which of the following is a disadvantage of using a within-subjects design?
It requires fewer participants.
It controls for individual differences.
It is susceptible to order effects.
It allows for better manipulation of the independent variable.
#12
Which statistical test is appropriate for comparing means of two independent groups?
Paired samples t-test
Chi-square test
Independent samples t-test
Analysis of variance (ANOVA)
#13
What is the purpose of debriefing in experimental research?
To provide participants with feedback on their performance.
To ensure that participants fully understand the study's purpose and procedures.
To manipulate participants' expectations.
To control for demand characteristics.
#14
What is a placebo in experimental research?
A substance that produces physiological effects.
A treatment that has no therapeutic effect.
A variable that is measured in the experiment.
A procedure used to minimize experimenter bias.
#15
In a single-blind study, who is unaware of the treatment being administered?
Only the participants
Only the researchers
Both the participants and the researchers
Neither the participants nor the researchers
#16
What is a Type II error in hypothesis testing?
Incorrectly rejecting a true null hypothesis.
Incorrectly failing to reject a false null hypothesis.
Failing to detect a true effect.
Detecting an effect that does not exist.
#17
What is a factorial design in experimental research?
A design that involves manipulating multiple independent variables.
A design that includes both experimental and control groups.
A design that follows participants over a long period of time.
A design that controls for order effects.