A Veterinarian Is Interested in Studying the Causes of Enteroliths

question 14

Multiple Choice

A veterinarian is interested in studying the causes of enteroliths (stones that form in the gut of horses) . In order to establish a causal relationship between diet and enteroliths, the veterinarian needs to:

• A)use a double-blind observational study.
• B)use a nonrandomized experimental design in which the examining veterinarian is blinded to the diet the horse is fed.
• C)use a comparative randomized experiment.
• D)use a survey questionnaire that is to be administered to all horse owners entering the veterinary hospital.

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Definitions:

Shape Constancy

The perceptual tendency to perceive an object as having the same shape regardless of its orientation or the angle from which it is viewed.

Figure-ground Constancy

A visual perception principle where an object (figure) is perceived distinctly from its surrounding area (ground).

Phi Phenomenon

The perception of unbroken movement created by quickly viewing a series of independent objects one after another, known as an optical illusion.

Monocular Cue

Visual information that allows perception of depth and distance using one eye.