A Key Threat to External Validity Is

question 3

Multiple Choice

A key threat to external validity is:

• A) Time progression effect
• B) Maturation effect
• C) Reactivity effect
• D) Sampling effect
• Essays:

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Definitions:

Acetylcholine

A neurotransmitter in the nervous system that plays a critical role in muscle contraction and the modulation of alertness, memory, and learning.

Norepinephrine

A neurotransmitter and hormone important in the body's response to stress, affecting attention, heart rate, and other physiological functions.

Histamine

An organic nitrogenous compound involved in local immune responses, as well as regulating physiological functions in the gut and acting as a neurotransmitter.

Threat Simulation Theory

A theory suggesting that dreaming serves an evolutionary purpose of practicing how to behave in potentially dangerous situations.