The advantage of including two treatment groups receiving the ...

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The advantage of including two treatment groups receiving the treatment at different times in a replicated interrupted time series design is that
 
  a. the control group is not necessary.
  b. the effect of a possible history threat to internal validity is more apparent.
  c. you avoid have to engage in pretest-posttest measurements.
  d. you can use counterbalancing to avoid maturation problems.

Question 2

Goldenberg et al. (1999) found that highly neurotic research participants associated sex with death whereas low neurotic participants did not. This comparison between participants high and low in neuroticism involved
 
  a. a nonequivalent control group design.
  b. a replicated interrupted time series design.
  c. a static-group comparison design.
  d. a quasi-experimental design.

[nikmaaacs]

Answer to Question 1

b

Answer to Question 2

d

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Thank you

[nikmaaacs]

No problem