In a Vision Experiment, Subjects Are Asked to View Stimuli

question 147

Multiple Choice

In a vision experiment, subjects are asked to view stimuli that include vertical black-and-red bars, as well as horizontal black-and-green bars, for a few minutes. Given what you know about the McCullough effect, what afterimages should the subjects see when presented with vertical or horizontal arrays of black-and-white bars?

• A)Vertical white bars would appear green and horizontal white bars would appear pink.
• B)All white bars will be seen as a pale purple.
• C)Vertical white bars would appear pink and horizontal white bars would appear green.
• D)Vertical white bars would appear blue and horizontal white bars would appear yellow.

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Definitions:

Sympathetic Nervous System

A part of the autonomic nervous system that prepares the body for action by accelerating the heart rate, constricting blood vessels, and raising blood pressure.

State of Arousal

A condition of heightened physiological and psychological activity, including alertness and physical preparedness.

Blood Pressure

The pressure exerted by circulating blood upon the walls of blood vessels, a critical indicator of cardiovascular health.

Neural Pathways

These are series of connected neurons that transmit electrical and chemical signals throughout the brain and nervous system.