#1
Which of the following is NOT a type of experimental design?
Pre-experimental design
Quasi-experimental design
Randomized control trial
Correlational design
#2
What is the independent variable in an experiment?
The variable that is measured
The variable that is manipulated
The variable that remains constant
The variable that changes as a result of manipulation
#3
What is the purpose of a control variable in an experiment?
To remain constant throughout the experiment
To be manipulated by the researcher
To be measured as the outcome variable
To be randomly assigned to participants
#4
Which of the following is an example of a continuous variable?
Gender
Height
Eye color
Marital status
#5
In a between-subjects design, participants are:
Experienced by both the control and experimental groups
Exposed to all levels of the independent variable
Only exposed to one level of the independent variable
Exposed to different levels of the dependent variable
#6
Which of the following is a potential confounding variable in an experiment?
Dependent variable
Independent variable
Extraneous variable
Control variable
#7
What is a factorial design in experimental research?
A design involving multiple levels of the independent variable
A design that focuses on interactions between variables
A design that includes multiple dependent variables
A design that incorporates both between-subjects and within-subjects factors
#8
What is the purpose of random assignment in experimental design?
To ensure that participants are similar in all groups
To reduce the likelihood of participant bias
To increase the variability of the independent variable
To match participants based on demographic characteristics
#9
What is the purpose of a pilot study in experimental research?
To gather preliminary data and identify potential issues
To recruit participants for the main study
To manipulate the independent variable
To analyze the results of the main study
#10
What is a covariate in experimental research?
A variable that mediates the relationship between the independent and dependent variables
A variable that is held constant to prevent confounding
A variable that is measured but not manipulated
A variable that is related to the dependent variable but not part of the experimental manipulation
#11
What is the purpose of a placebo in experimental research?
To ensure that participants believe they are receiving treatment
To provide a standard against which the experimental treatment can be compared
To manipulate the independent variable
To control for demand characteristics
#12
What is the difference between random sampling and random assignment?
Random sampling ensures that each participant has an equal chance of being assigned to a group, while random assignment ensures that each group is representative of the population
Random sampling ensures that each group is representative of the population, while random assignment ensures that each participant has an equal chance of being assigned to a group
Random sampling is used in experimental research, while random assignment is used in survey research
Random sampling and random assignment are synonymous terms
#13
What is the purpose of stratified sampling?
To ensure every member of the population has an equal chance of being selected
To divide the population into groups and then randomly select individuals from each group
To select individuals who are readily available
To select individuals who meet specific criteria
#14
What is a Type II error in hypothesis testing?
Rejecting the null hypothesis when it is true
Failing to reject the null hypothesis when it is false
Accepting the alternative hypothesis when it is false
Accepting the null hypothesis when it is true
#15
What is the purpose of a control group in an experiment?
To ensure that only one variable is manipulated
To serve as a comparison to the experimental group
To eliminate all extraneous variables
To manipulate the independent variable
#16
What is the difference between a dependent variable and an outcome variable?
There is no difference; they are synonymous
Dependent variables are measured before the experiment, while outcome variables are measured after
Dependent variables are manipulated by the researcher, while outcome variables are observed
Dependent variables are measured to assess the effects of the independent variable, while outcome variables are specific measures of interest
#17
What is the purpose of blinding in experimental research?
To prevent participants from dropping out of the study
To ensure that participants are aware of the purpose of the study
To prevent bias in the administration of treatments or measurements
To ensure that researchers are unaware of the hypotheses being tested
#18
What is the difference between internal validity and external validity in research?
Internal validity refers to the generalizability of findings, while external validity refers to the accuracy of measurements
Internal validity refers to the accuracy of measurements, while external validity refers to the extent to which findings can be generalized
Internal validity refers to the extent to which a study accurately represents reality, while external validity refers to the extent to which findings can be generalized to other populations or settings
Internal validity refers to the reliability of measures, while external validity refers to the consistency of findings across different studies
#19
In a repeated measures design, participants:
Are exposed to all levels of the independent variable
Are only exposed to one level of the independent variable
Are randomly assigned to different groups
Serve as their own control
#20
What is the difference between a main effect and an interaction effect in factorial designs?
Main effects involve the independent variable, while interaction effects involve the dependent variable
Main effects involve the dependent variable, while interaction effects involve the independent variable
Main effects represent the combined influence of all independent variables, while interaction effects represent the joint influence of two or more independent variables
Main effects are always significant, while interaction effects are not
#21
What is counterbalancing in experimental design?
A procedure used to ensure that the order of conditions is the same for all participants
A statistical technique used to control for extraneous variables
A method used to match participants in different groups
A technique used to manipulate the independent variable
#22
What is a within-subjects design?
A design in which each participant is exposed to all levels of the independent variable
A design in which participants are randomly assigned to different groups
A design in which participants are matched based on certain characteristics
A design in which participants are exposed to only one level of the independent variable
#23
What is a type I error in hypothesis testing?
Rejecting the null hypothesis when it is true
Failing to reject the null hypothesis when it is false
Accepting the alternative hypothesis when it is false
Accepting the null hypothesis when it is true
#24
In a double-blind study, who is unaware of the treatment assignments?
Only the participants
Only the researchers
Both the participants and the researchers
Neither the participants nor the researchers
#25
What is the purpose of a scatterplot in data analysis?
To display the relationship between two continuous variables
To summarize the distribution of a single variable
To compare the means of two groups
To identify outliers in the data