A Psychiatrist Tells You That She Is Interested in Determining

question 27

Multiple Choice

A psychiatrist tells you that she is interested in determining if the condition of individuals who are clinically depressed improves with either 20 or 40 milligrams of Prozac.She decides to administer 20 milligrams to a random half of her clients,and 40 milligrams to the other half.She finds that after six months,the clients who took 40 milligrams of Prozac are significantly less depressed than those clients who took 20 milligrams of Prozac.Which type of study did the psychiatrist conduct?

• A)correlational research
• B)experimental research
• C)controlled research
• D)hypothetical research

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Definitions:

Scavengers

Organisms that feed on dead or decaying organic matter, playing an important role in the ecosystem by helping to dispose of waste and recycle nutrients.

Radial Symmetry

A symmetry in which body parts are arranged around a central axis, so that any vertical cut through the axis results in identical halves, common in many invertebrates.

Nutrient Uptake

The process by which organisms obtain nutrients from their environment, essential for growth and maintenance.

Hemichordates

A phylum of sedentary, wormlike deuterostomes.