There are many good reasons for pretesting participants before ...

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There are many good reasons for pretesting participants before introducing the independent variable. Perhaps the most common of these is that pretesting
 
  a. gives the experimenter direct evidence of change in performance.
  b. is a prerequisite for posttesting.
  c. eliminates the need for random assignment of participants to groups.
  d. increases the sensitivity of the experiment.

Question 2

One disadvantage of the interaction design for single-case research is that it cannot be used if
 
  a. you are testing more than one participant.
  b. you do not randomly select participants from the population.
  c. you are investigating the effectiveness of psychotherapy techniques.
   d. one of the treatments by itself causes a maximum change in behavior.

[AISCAMPING]

Answer to Question 1

A

Answer to Question 2

D

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Excellent

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