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

Multiple Choice

Exhibit 10-9: Identify the threats to internal validity illustrated in the examples below.
-Refer to Exhibit 10-9.Students falling below the 10th percentile on a reading achievement test later receive higher scores on a similar test; students above the 90th percentile receive lower scores on the second test administration.

A) experimental mortality
B) reactive effect of testing
C) statistical regression
D) maturation
E) instrumentation