In an interrupted time-series design, regression to the mean is ...

[DelorasTo]

In an interrupted time-series design, regression to the mean is more plausible when subjects
 
  a. fail to show up for the study.
  b. in the pretest, have scores that are unusually high or low.
  c. in the pretest, have scores that are near the average of the distribution.
  d. in the posttest, fail to complete the task.

Question 2

Stability in the data from an interrupted time-series research design can best be seen when the
 
  a. researcher does not have good control of nonsystematic variance.
  b. subjects display a good deal of individual differences.
  c. study makes use of multiple assessments of subjects' behavior.
  d. researcher opts to use, instead, a naturalistic observational design.

[smrtceo]

Answer to Question 1

b

Answer to Question 2

c