Ninth Edition CoverGraziano & Raulin
Research Methods (9th edition)

Chapter 7 True/False Questions
Correlational and Differential
Methods of Research

Challenge yourself with these true/false questions. Click on your choice to see if you are correct.

  1. In correlational research, there is usually a single group of participants. (True/False)

  2. Many theories can make almost an infinite number of predictions. (True/False)

  3. The sex or religion of the participant is a quantitative dimension of differentiation. (True/False)

  4. Differential research involves manipulating the independent variables. (True/False)

  5. The Spearman r is used if one variable is measured on an ordinal scale and neither variable is measured on a nominal scale. (True/False)

  6. A correlation coefficient of -1.00 means that there is virtually no relationship between the variables. (True/False)

  7. Ideal control groups are easy to find. (True/False)

  8. Determining causation is not possible with correlational research, but can be determined in a differential study. (True/False)

  9. Differential and correlational research findings are interpreted in a similar way. (True/False)

  10. The strength of a relationship between two or more items is quantified in correlational research. (True/False)

  11. A correlation can never negate a theory. (True/False)

  12. In differential research, the group differences existed before the study was conducted. (True/False)

  13. ANOVAs cannot be used at the differential level. (True/False)

  14. The coefficient of determination is the square root of the correlation coefficient. (True/False)

  15. Correlational research is largely an extension of experimental research. (True/False)

  16. The relationship sought in a correlational study is a predictive relationship. (True/False)

  17. Manipulated independent variables are used in differential research. (True/False)

  18. Correlations indicate causality. (True/False)

  19. In differential research, at least four groups are needed. (True/False)

  20. A correlation may be used to predict events. (True/False)

  21. The same statistical procedures can be used in differential and experimental research. (True/False)

  22. Random sampling from a population allows us to generalize to that population. (True/False)

  23. In differential research, the nonmanipulated independent variable is typically a discrete variable. (True/False)

  24. A theory can be proved by correlations. (True/False)

  25. Research involves the study of relationships among variables. (True/False)

  26. Differential research is conceptually similar to correlational research. (True/False)

  27. Confounding factors can lead to artifactual findings. (True/False)

  28. Experimental procedures are used in situations in which manipulation of variables is impractical or impossible. (True/False)

  29. Ptolemy predicted the movements of the planets. (True/False)

  30. Differences between groups in differential research are manipulated by the researcher. (True/False)

  31. Experimental manipulation is never unethical. (True/False)

  32. A moderator variable seems to modify the relationship between other variables. (True/False)

  33. In differential research, the independent variable is called the classification variable. (True/False)

  34. Spearman proposed a general trait of intelligence. (True/False)

  35. Random assignment to conditions solves most ethical problems. (True/False)

  36. Some of the ethical problems in clinical neuropsychology can be solved with the use of correlational designs. (True/False)