Exhibit 10-10: Identify the Major Threat to Internal Validity in the Following

question 34

Multiple Choice

Exhibit 10-10: Identify the major threat to internal validity in the following research studies.
-Refer to Exhibit 10-10.A researcher conducted a semester-long experiment comparing two instructional programs in math.During the administration of tests during the semester, the researcher found that about ten percent of the experimental group and about five percent of the control group were absent for each administration.

• A) Regression
• B) Diffusion
• C) Mortality
• D) Selection
• E) History

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Definitions:

Reactions

Responses or behavior of an organism resulting from external or internal stimuli.

Major Neurotransmitter

A primary chemical messenger that transmits signals across neurons in the brain and body.

Norepinephrine

A neurotransmitter and hormone involved in the body's response to stress, increasing heart rate, blood pressure, and sugar levels in the brain.

Reinforcement

In psychology, any event that strengthens or increases the likelihood of a specific response or behavior by providing a consequence an individual finds rewarding.