The Basic Threat to Internal Validity for a Nonequivalent Groups

question 24

Multiple Choice

The basic threat to internal validity for a nonequivalent groups design is

• A)history.
• B)assignment bias.
• C)regression.
• D)reactivity.

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Definitions:

Enlarged Liver

A condition where the liver is larger than normal, possibly indicating liver disease, heart failure, or cancer.

Hepatitis

A viral disease affecting the liver; several types of the virus can be sexually transmitted.

Jaundice

A medical condition characterized by the yellowing of the skin and the whites of the eyes caused by high bilirubin levels.

Papular Rash

A skin condition characterized by a raised and often red area that can be itchy or irritating.