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Experimental Design or Quasi-Experimental Designs

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Experimental Design or Quasi-Experimental Design

I need help with the following:
You are given the opportunity to design a research study of your choice preferably something along the lines in the medical field in Physical Therapy,Experimental or Quasi-Experimental.

What would be the advantages and the disadvantages of you doing one or the other?

Please think of this study in these terms of the sky is the limit, you have a NIH grant to fund the study, fund the hours of your research time and half of your work time as a clinician will be as the Principal Investigator on this research study and your other hours would be clinical work.

Goal- is to process the research design; there is no right or wrong answer of picking Experimental vs. Quasi-Experimental. Please include references used.

Thank you

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1. You are given the opportunity to design a research study of your choice preferably something along the lines in the medical field in Physical Therapy, Experimental or Quasi-Experimental. What would be the advantages and the disadvantages of you doing one or the other?

For an experimental design, you need:

? A hypothesis for a causal relationship;
? A control group and a treatment group;
? Random assignment to groups.
? Eliminate confounding variables that might challenge internal validity of the experiment and prevent displaying the causal relationship http://writing.colostate.edu/guides/research/experiment/pop3e.cfm

The advantage of the true experiment is that you can make causal statements and generalize to the larger population because you have more control of extraneous variably. Disadvantages include:

? Too much control leads to a disadvantage: it is contrived in a laboratory situation, so the results may differ from the real world. ...

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