EPPP Psychology

Category - Assessment and Diagnosis

Test J has a correlation of .60 with test K and a correlation of .30 with test L. test J accounts for how much less or more variability in test K as it does in test L?
  1. Half as much
  2. Twice as much
  3. Four times as much
  4. Eight times as much
Explanation
Answer: C - Test J accounts for four times as much variability in test K than it does in test L. Each correlation is converted to a percentage and then the first percentage is divided by the second. A correlation of .60 converts to 36%. A correlation of .30 converts to 9%. Divide 36 by 9 for a result of 4.
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