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 were given a pretest measuring attitudes toward a minority group and then viewed a film on the accomplishments of members of the minority.The students showed significantly more favorable attitudes after viewing the film.

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