Which of the Following Uses a Quasi-Experimental Design

question 17

Multiple Choice

Which of the following uses a quasi-experimental design?

• A) A researcher compares the effects of caffeine on sleep by assigning subjects randomly into one of 3 treatment groups (5, 10 or 20 mg. doses of caffeine) and recording EEGs of each subject
• Throughout the night.
• B) To see whether the effectiveness of a new method of reading instruction is different for bilingual children vs. children who speak only English, 40 Bilingual and 40 English-Speaking children are
• Taught using the bilingual method for one semester and reading scores for the 2 groups are
• Compared.
• C) A clinical psychologist tests the relative effectiveness of two forms of therapy for treatment of panic attacks by recruiting 20 people diagnosed with panic attacks and treating half with one form
• Of therapy and half with the other form of therapy for the same amount of time.
• D) In a study of picture memory, 40 subjects are shown 1000 photographs under standard viewing conditions and recognition of the pictures is tested 1 week, 2 weeks, 4 weeks, and 8 weeks later.

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Definitions:

Equilibrium Price

The price at which the quantity of a good demanded by consumers equals the quantity supplied by producers.

Competitive Market

A market structure characterized by many buyers and sellers, free entry and exit, and a product for which each seller offers an essentially identical item.

Efficient Outcomes

An economic condition whereby resources are allocated in the most effective manner, maximizing overall welfare.

Demand Curves

Graphic representations showing the relationship between the price of a good or service and the quantity of that good or service people are willing and able to buy.