In order to examine environmental factors that influence alcohol consumption,Henry asks the same set of participants to come to the laboratory on several consecutive occasions and fill out a questionnaire before drinking any alcohol.Henry finds that over time,fewer and fewer participants show up to fill out the questionnaire.This lack of continued participant involvement is an example of a _____ problem.
A) selection
B) mortality
C) regression toward the mean
D) testing

Question

Quizplus · Accepted Answer

The decrease in participant involvement over time is an example of mortality problem. Participants are dropping out of the study or "dying" out, which can affect the representativeness of the sample and the accuracy of the results.

In Order to Examine Environmental Factors That Influence Alcohol Consumption,Henry