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1 June, 18:38

While conducting a before and after quasi experiment on fire preparedness at a local university and before the post-test was administered, a major fire occurs in a dorm on campus. Although the post test showed increased fire preparedness, the researchers could not conclude that their experimental treatment was the cause. What source of internal validity were the researchers most likely concerned about?

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  1. 1 June, 22:18
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    The researchers were most concerned about External events.

    Explanation:

    Quasi-experimental designs are different from true experimental designs. They resemble the experimental research but it is not the real one. There are various types of quasi-experiment design, one of the important designs is the pretest and posttest design which is discussed in the above scenario.

    The most likely reason for the experimental effect is based on selection bias. Self-fulfilling Prophecy & Instrument Decay might be the potential cause of the internal validity that is linked with the experiment done by the staff.
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