In Professor John's Three-Week Experiment, the Control Group Has Realized

question 15

Multiple Choice

In Professor John's three-week experiment, the control group has realized that the experimental group is being exposed to lavish lunches as part of the experiment, while they are stuck with plain microwaved meals. In protest, they have decided to stop full participation. Which form of internal invalidity does Professor John have to worry about?

• A)Maturation
• B)Demoralization
• C)Selection biases
• D)Experimental mortality
• E)Statistical regression

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