If levels of attrition are high among study participants,_____ will threaten the internal validity of the study.
A) history
B) maturation
C) testing
D) instrumentation
E) mortality

Question

Quizplus · Accepted Answer

Mortality (also known as dropout or non-response) occurs when participants fail to complete a study, which can result in a biased sample and threaten the internal validity of the study. The loss of participants may result in a lack of statistical power or confounding variables that were not accounted for in the analysis. The other options - history, maturation, testing, and instrumentation - are threats to internal validity but are not directly related to the loss of participants.

If Levels of Attrition Are High Among Study Participants,_____ Will