What Can Help Rule Out the Threats to Internal Validity

question 78

Multiple Choice

What can help rule out the threats to internal validity in an experimental design?

• A) proper selection and assignment of subjects to groups
• B) large sample size
• C) small sample size
• D) nothing can rule out threats to internal validity

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Definitions:

Epiglottis

A leaf-shaped flap of cartilage located behind the tongue, which closes over the windpipe during swallowing to prevent food from entering the airways.

Nasal Cavity

The interior space of the nose, lined with mucosa, involved in breathing and the olfactory process.

Pharynx

A muscular tube that connects the mouth and nasal passages with the esophagus and larynx, playing a key role in both the respiratory and digestive systems.

Hyperventilates

Excessively rapid or deep breathing, which can lead to a decrease in carbon dioxide in the blood, causing lightheadedness or tingling of the limbs.