The Number of Psychological Disorders Identified by the Diagnostic and Statistical

question 8

Multiple Choice

The number of psychological disorders identified by the Diagnostic and Statistical Manual of Mental Disorders has increased from 60 in 1952 to approximately 400 in 2013. Which is the BEST explanation for the increase in the number of psychological disorders?

• A) Psychologists have learned how to better differentiate among the various psychological disorders.
• B) There are significantly more psychologists and psychiatrists available to identify different psychological disorders.
• C) The increasingly stressful lives of children and adults have led to a significant increase in the number of psychological disorders.
• D) All the answers are correct.

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Definitions:

Retinal Disparity

The difference in visual images that each eye perceives because of the eyes' different positions, a cue used for depth perception in binocular vision.

Optical Illusions

Visual tricks that deceive the eye, making the viewer perceive something differently from its actual reality.

Eye Muscles

The group of muscles surrounding the eye that allow for its movement and the ability to focus on different objects.

Light Rays

Streams of photons traveling in a straight line, visible as light to the human eye.