Exhibit 10-9: Identify the threats to internal validity illustrated in the examples below.
-Refer to Exhibit 10-9.Preschoolers who received treatment for stuttering during the year show a significant improvement in articulation.
A) experimental mortality
B) reactive effect of testing
C) statistical regression
D) maturation
E) instrumentation

Question

Quizplus · Accepted Answer

The improvement in articulation among preschoolers who received treatment for stuttering could be attributed to their natural growth and development over the year, which is an example of maturation affecting the study's internal validity.

Exhibit 10-9: Identify the Threats to Internal Validity Illustrated in the Examples