Those experimental designs in which researcher can predict confidently about the fact that the dependent variable can manipulate the independent variable. In such models, the researcher has full control over the extraneous variables (Salazar, 2015).
Following are some of the attributes of the research design.
Manipulation means the researcher’s ability to examine the impact of the independent variable on the dependent variable through interventions. In manipulation, the researcher has the control over independent variable.
It tells about how the effects of extraneous variables on the dependent variable are controlled by the control group.
Randomization means that on a random basis every subject has equal chances of being assigned to the experimental study.
- Effect of parietal lobe damage on people’s ability to do basic arithmetic could not be studied using experimental design because the variables cannot be manipulated using a control. For any research purpose, manipulation of the variables is very crucial.
- Effect of being clinically depressed on the number of close friendships people have. This topic cannot be studied by experimental research design mainly because variables cannot be manipulated. On random basis chances of the variables to be associated with the research design are high.
- Effect of group training on the social skill of teenagers with Asperger’s syndrome, this topic can be studied concerning experimental research design because variables can be manipulated and the effects of variables on the dependent variable can be controlled.
- Effect of paying people to take an IQ test on their performance on that test. This topic can be studied concerning experimental research design as it’s variables could be manipulated, and the effects of extraneous variables on the dependent variable can be controlled.
Salazar, L. F., Crosby, R. A., & DiClemente, R. J. (2015). Research methods in health promotion. John Wiley & Sons.