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

Question

Quizplus · Accepted Answer

The control group's decision to stop full participation due to the unfairness in meal provision is an example of demoralization. This form of internal invalidity occurs when participants lose motivation or become discouraged, affecting the study's results. It is important to address demoralization to ensure that participants remain engaged and motivated throughout the experiment.

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