Peg gives everyone participating in an experiment a pretest which measures attitudes toward the brand.When she examines this data,she notices problems with several of the questions.She revises these questions prior to their use on the post-test.This change could result in ________ threats to internal validity.
A)Interaction
B)Testing
C)Instrumentation
D)Historical
E)Researcher bias

Question

Quizplus · Accepted Answer

The change in the questions used to measure attitudes toward the brand represents a change in the instrumentation, which could introduce threats to internal validity by altering the way in which data is collected and measured. The other potential threats listed - interaction, testing, historical, and researcher bias - are not directly related to changes in the instrumentation used to collect data.

Peg Gives Everyone Participating in an Experiment a Pretest Which