Fundamentals of Experimental Design Quiz

Explore key principles, statistical tests, and variables in experimental design. Test your knowledge with 14 insightful questions!

Practice Learn Test

Which of the following is a key principle of experimental design?

Randomization

Confirmation bias

Anecdotal evidence

Convenience sampling

What is the purpose of a control group in an experiment?

To receive the experimental treatment

To provide a baseline for comparison

To ensure the experiment is ethical

To eliminate confounding variables

What is the purpose of a pilot study in experimental design?

To test the feasibility of the experiment

To recruit participants for the main study

To analyze the results of the main study

To collect preliminary data for publication

What is the difference between a dependent variable and an independent variable in experimental design?

Dependent variables are manipulated by the researcher, while independent variables are measured.

Independent variables are manipulated by the researcher, while dependent variables are measured.

Dependent variables are controlled by the researcher, while independent variables are measured.

Independent variables are controlled by the researcher, while dependent variables are manipulated.

Which statistical test is appropriate for comparing means of two groups in an experiment?

Chi-square test

ANOVA

t-test

Regression analysis

What is a factorial design in experimental design?

An experimental design with multiple independent variables

An experimental design with one independent variable and multiple dependent variables

An experimental design where participants are grouped based on specific criteria

An experimental design with multiple control groups

What is the purpose of blinding in experimental design?

To prevent participants from knowing which treatment they are receiving

To ensure the experimenter knows which treatment each participant is receiving

To eliminate the need for a control group

To manipulate the results of the experiment

Which of the following is NOT a threat to internal validity in experimental design?

History

Maturation

Participant bias

Regression to the mean

In a 2x2 factorial design, how many treatment conditions are there?

#10

What is a Type I error in hypothesis testing?

Rejecting a true null hypothesis

Failing to reject a false null hypothesis

Accepting the alternative hypothesis when it's true

Accepting the null hypothesis when it's false

#11

What is the advantage of using a within-subjects design over a between-subjects design?

Less susceptible to participant bias

Requires fewer participants

Easier to control for individual differences

Reduces the risk of order effects

#12

What is the purpose of counterbalancing in experimental design?

To ensure that each participant receives the same treatment

To eliminate order effects

To increase external validity

To control for confounding variables

#13

What is the purpose of stratified random sampling in experimental design?

To ensure that each participant has an equal chance of being selected

To control for the effects of extraneous variables

To increase the representativeness of the sample

To eliminate the need for random assignment

#14

What is the difference between internal validity and external validity in experimental design?

Internal validity refers to the generalizability of results, while external validity refers to the accuracy of measurement.

Internal validity refers to the accuracy of measurement, while external validity refers to the extent to which results can be generalized.

Internal validity refers to the degree to which the study accurately reflects reality, while external validity refers to the degree to which results can be attributed to the independent variable.

Internal validity refers to the degree to which the study accurately reflects reality, while external validity refers to the extent to which results can be generalized.