Research Design Characteristics
The question asks for a research design that involves manipulating variables but does not use randomization. Let's analyze the options based on these criteria:
- Variable Manipulation: The researcher actively changes or introduces an independent variable to observe its effect on a dependent variable.
- Randomization: Participants are randomly assigned to different experimental groups (e.g., treatment vs. control). This helps ensure groups are equivalent at the start.
Analyzing Research Designs
We need a design that scores YES for manipulation and NO for randomization.
- True experiment: Involves both manipulation of variables AND random assignment. This does not fit the criteria.
- Cross-sectional study: Observes variables at a single point in time. It does not involve manipulation. This does not fit the criteria.
- Longitudinal study: Observes variables over an extended period. It typically does not involve manipulation. This does not fit the criteria.
- Quasi experiment: Involves the manipulation of variables but does NOT use random assignment. Often, pre-existing groups are used. This fits the criteria perfectly.
Conclusion on Research Design
A quasi experiment fits the description because it requires the researcher to manipulate an independent variable but relies on non-random methods (like using existing groups) to assign participants. This contrasts with a true experiment, which mandates random assignment.
Important Questions from Research Design - Teaching
- Which of the follwing are considered as a part of True Experimental Design?
A. Randomized Group Design
B. One-Group Pre-Test Post- Test Design
C. Non Equivalent control Group Design
D. Pretest- Posttest Randomized Group Design
E. Soloman Four Group Design
Choose the most appropriate answer from the options given below: - Which of the following factors affect the internal validity of an experimental research?
A. Placebo effect
B. Instrument Decay
C. Contemporary events
D. Hawthorne effect
E. Bias in selecting subjects in sample
Choose the most appropriate answer from the options given below : - What is modeling approach of research design?
Which of the following are included in major research designs?
A. Experimental
B. Cross-sectional
C. Longitudinal
D. Case-study
Choose the correct answer from the options given below :- In an experimental group design, pairs of participants are selected who are similar in terms of the independent variable under consideration and then each of the pair is randomly assigned to the controlled or experimental group. Which of the following type of experimental designs it is related to ?
