Answers to Key Terms Exercise

  1. third-variable problem
  2. double-blind procedure
  3. median
  4. right-skewed distribution
  5. placebo effect
  6. negative correlation
  7. random assignment
  8. percentile rank
  9. biological perspective
  10. operational definition
  11. hindsight bias (I-knew-it-all-along phenomenon)
  12. scatterplot
  13. population
  14. range
  15. inferential statistical analyses