A problem with nonequivalent group designs is that any ...

[sjones]

A problem with nonequivalent group designs is that any differences found could be explained by differences in ____.
 
  a. participant characteristics
  b. history
 c. instrumentation
 d. testing effects

Question 2

If a survey may need on-the-spot modifications, a(n) ____ is preferable.
 
  a. group questionnaire
  b. phone interview
 c. mail questionnaire
  d. e-mail questionnaire

[bassamabas]

Answer to Question 1

a

Answer to Question 2

b

[sjones]

Thanks for the timely response, appreciate it

[tanna.moeller]

Wow, this really help