Which of the following uses a quasi-experimental design? a. A ...

[mpobi80]

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 subjectthroughout 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 aretaught using the bilingual method for one semester and reading scores for the 2 groups arecompared.
 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 formof 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.

Question 2

Explain how simulation and field studies increase external validity.
 
  What will be an ideal response?

[stillxalice]

Answer to Question 1

B

Answer to Question 2

Research results obtained in an artificial laboratory environment may not generalize to real-world situations. That is, results from a laboratory may have low external validity. To correct this problem, researchers often try to create conditions in the laboratory that simulate the natural environment, or they create a field study by moving the experiment out of the laboratory and into the real world. In each case, the intent is to observe behaviors in the same environment where they would occur naturally.

[mpobi80]

Thank you

[stillxalice]

No problem