How can a researcher be sure that threats to internal validity ...

[crobinson2013]

How can a researcher be sure that threats to internal validity are being ruled out in the design?
 
  a. sorting out what threats are applicable in which settings
  b. comparing the results of several posttests
  c. random selection will rule out, or greatly reduce, the chances for statistical regression
  d. all the above

Question 2

One threat to internal validity in criminal justice research that is not very significant is
 
  a. history, because few things happen on a grand scale that would impact criminal justice research
  b. maturation, because criminal justice subjects are not in research studies long enough to mature
  c. statistical regression, because subjects in the criminal justice system are likely to score lower than the mean anyway
  d. the concern about the publication of the findings

[nital]

Answer to Question 1

d

Answer to Question 2

d

[crobinson2013]

Thanks

[nital]

Welcome