A Researcher Does a Study on a New Therapy to Treat

question 67

Multiple Choice

A researcher does a study on a new therapy to treat anxiety. All of her participants are men; it turns out the therapy is not effective with women. This example illustrates which of the following threats to external validity?

• A) Reactive arrangements
• B) Multiple-treatment interference
• C) Interaction of selection and treatment
• D) Interaction of testing and treatment

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Definitions:

Obstruction

A blockage or impediment that prevents normal flow or movement within a bodily structure, such as intestines or blood vessels.

Retrovirus

A type of virus that inserts a copy of its RNA genome into the DNA of a host cell, thereby altering the host’s genetic information.

Staphylococcal Prostatitis

An inflammation of the prostate gland caused by infection with staphylococcal bacteria, leading to urinary tract symptoms and discomfort.

Acute

Acute refers to conditions or diseases that have a sudden onset and severe symptoms but are usually of short duration.