Which Factors Would Be Considered Threats to Internal Validity? (Select

question 8

Multiple Choice

Which factors would be considered threats to internal validity? (Select all that apply.)

• A) Time
• B) Selection effects
• C) History
• D) Testing
• E) Subject availability
• F) Cost
• G) Selection bias

---

Definitions:

Panic Disorder

A mental health condition characterized by sudden and repeated episodes of intense fear or discomfort, along with physical symptoms such as heart palpitations, chest pain, or shortness of breath.

Obsessive-Compulsive Disorder

A mental health disorder where individuals experience uncontrollable, recurring thoughts (obsessions) and behaviors (compulsions) they feel the urge to repeat repeatedly.

Generalised Anxiety Disorder

A mental health condition characterized by persistent and excessive worry about multiple aspects of life, beyond what might be considered reasonable.

Panic Disorder

A mental health condition characterized by sudden and repeated episodes of intense fear accompanied by physical symptoms like rapid heartbeat or dizziness.