In Widom’s study of the effects of child abuse and its impact upon later criminal
offenses, she selected a sample of children with court records of being abuse victims
and gathered a comparison group that were matched on gender, race, age and
socioeconomic status. The technique used in this case was ____.
a. individual matching
b. aggregate matching
c. randomization
d. probabilistic aggregation
When reporting research findings in professional journals, ____.
a. negative findings should be omitted
b. technical failures and mistakes should be reported
c. unexpected findings should not be reported.
d. limitations in the research need not be discussed
Which type of questions should be avoided on a questionnaire?
a. short items