Use the Guidelines to Evaluate the Study

question 175

Multiple Choice

Use the guidelines to evaluate the study. From the information given, what is the biggest flaw in the study?
-A pharmaceutical company conducted a study to test the effectiveness of its new anti-depression medication. 500 adults suffering from depression were selected at random and were randomly
Assigned to either a treatment group or a placebo group. The experiment was double blind. The
Results were analyzed by the company.

• A)Selection bias
• B)The setting may not encourage honest responses
• C)The source of the study
• D)Confounding variables
• E)Variables are difficult to define/measure

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Definitions:

Lens

A piece of transparent material, usually glass or plastic, that refracts or focuses light rays, used in glasses and optical instruments.

Critical Periods

Specific times during early development when the organism is particularly sensitive to certain environmental stimuli, which can have a lasting effect on later development.

Sensory Adaptation

The adjustment of sensory receptors to the level of stimulation they are exposed to, leading to decreased sensitivity with constant exposure.

Depth Perception

The visual ability to perceive the world in three dimensions, enabling the estimation of the distance of an object.