Experimental Design in Research Methodology

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What is the primary purpose of randomization in an experimental design?

To reduce the number of observations

To increase the sample size of the experimental group

To eliminate the effects of extraneous variables (correct)

To ensure that the treatment is effective

Which experimental design lacks a control group?

True experimental design

Randomized controlled trial

One-shot case study (correct)

Quasi-experimental design

What is the independent variable in an experiment?

The variable being measured or observed

The variable being controlled

The variable being predicted

The variable being manipulated or changed (correct)

What is the purpose of a pretest in an experiment?

To establish a baseline measurement of the dependent variable Signup and view all the answers

Which type of experimental design has a high degree of controlling extraneous variables?

True experimental design Signup and view all the answers

What is the dependent variable in an experiment?

The variable being measured or observed Signup and view all the answers

What is the main limitation of the one-group pretest-posttest design?

No proper selection is made Signup and view all the answers

What is the primary purpose of comparing pretest and posttest results in the one-group pretest-posttest design?

To determine the treatment's effect Signup and view all the answers

What is the key characteristic that distinguishes quasi-experimental designs from true experimental designs?

No randomization is required Signup and view all the answers

What is the purpose of random selection in experimental design?

To randomly assign subjects to groups Signup and view all the answers

In a static-group comparison design, what is compared to determine the treatment's effect?

Posttest results of the experimental and control groups Signup and view all the answers

What is the main difference between a non-equivalent control group design and a pretest-posttest control group design?

No randomization is required in the non-equivalent control group design Signup and view all the answers

What is the major drawback of the quasi-experimental design?

Presence of extraneous variables Signup and view all the answers

In a true experimental design, how are subjects assigned to groups?

Through random assignment Signup and view all the answers

What is the purpose of a control group in an experimental design?

To compare the results of the experiment with a similar group Signup and view all the answers

What is the dependent variable in an experiment?

The variable being measured or observed Signup and view all the answers

What is the key difference between a one-group pretest-posttest design and a time-series design?

Number of times the subjects are pretested and post-tested Signup and view all the answers

In a posttest-only control group design, when is the dependent variable measured?

Only once, after the treatment Signup and view all the answers

Experimental Design in Research Methodology

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Questions and Answers

What is the primary purpose of randomization in an experimental design?

Which experimental design lacks a control group?

What is the independent variable in an experiment?

What is the purpose of a pretest in an experiment?

Which type of experimental design has a high degree of controlling extraneous variables?

What is the dependent variable in an experiment?

What is the main limitation of the one-group pretest-posttest design?

What is the primary purpose of comparing pretest and posttest results in the one-group pretest-posttest design?

What is the key characteristic that distinguishes quasi-experimental designs from true experimental designs?

What is the purpose of random selection in experimental design?

In a static-group comparison design, what is compared to determine the treatment's effect?

What is the main difference between a non-equivalent control group design and a pretest-posttest control group design?

What is the major drawback of the quasi-experimental design?

In a true experimental design, how are subjects assigned to groups?

What is the purpose of a control group in an experimental design?

What is the dependent variable in an experiment?

What is the key difference between a one-group pretest-posttest design and a time-series design?

In a posttest-only control group design, when is the dependent variable measured?

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