What Theory of Perception Proposes That Detection of Stimuli Depends

question 109

Multiple Choice

What theory of perception proposes that detection of stimuli depends on a variety of factors including, but not limited to, physical intensity of the stimulus, fatigue of the observer, and expectancy?

• A)opponent-process theory
• B)multiple-perceptual-context theory
• C)signal-detection theory
• D)weber's theory

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Definitions:

Positron Emission Tomography (PET)

A technique for creating images of brain activity by injecting a radioactive tracer into the blood and then, using a scanner, finding where in the brain the blood is being metabolized.

Substantia Nigra

A part of the brain involved in the control of movement and is associated with diseases such as Parkinson's due to its role in dopamine production.

Dopamine

A neurotransmitter in the brain that plays an important role in positive emotions and response to reward.

Norepinephrine

An important neurotransmitter in the brain that is associated with responses to stress; also called noradrenaline.