The One Threat to Internal Validity That the "Classic" Experimental

question 12

Multiple Choice

The one threat to internal validity that the "classic" experimental design cannot control is:

• A)attrition due to voluntary quitting.
• B)history that results from things external to the experimental setting.
• C)maturation on the part of the experimental subjects.
• D)testing that results from weaknesses in the measurement devices.

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Definitions:

Discordant

Describes elements or things that are in disagreement or not in harmony.

Genetic Material

DNA or RNA that codes for hereditary traits and is passed from one generation to the next.

Neurodevelopmental Disorder

Disorders of brain function that affect emotion, learning ability, self-control, and memory that unfold as an individual grows.

Schizophrenia

A chronic brain disorder that affects less than one percent of the U.S. population and is characterized by delusions, hallucinations, disorganized speech, and impairments in social or occupational functioning.