A particular aptitude test shows a moderate correlation with college GPA. Some argue that many ...

A particular aptitude test shows a moderate correlation with college GPA. Some argue that many students who would not have succeeded in college anyway choose not to take the test or attempt college work, thus resulting in a form of self-preselection. What would be the effect on the validity index of the aptitude test if every high school senior took the test and attempted one year of college?
 
  a. Validity would increase. c. No effect on validity.
  b. Validity would decrease. d. Impossible to predict.

Ques. 2

A researcher is studying the effect of word games on spelling achievement. Of two randomly assigned groups one receives experience with word games, while the other does not. A spelling test is then administered. This design is
 
  a. counterbalanced.
  b. randomized subjects, posttest only control group.
  c. a simple 2 x 2 factorial.
  d. a static group