Exam 5: Section 1: Experimental and Quasi-Experimental Designs

When using a nonequivalent-groups design, the researcher will handle subject assignment to groups by ____.

Describe an experimental design to test the causal hypothesis that D.A.R.E. reduces drug use. Is your experimental design feasible? Why or why not?

Which statement is most accurate?

Which statement is accurate?

Which statement is most accurate?

When random assignment to experimental and control groups is not possible, the researcher may be forced to use an _______________ design.

Which statement best fits randomization as it is used in experiments?

An experiment examines the effects of an ____ variable.

Increasing experimental control will result in decreased _______________ validity.

In a classical experiment, subjects are measured on the independent variable before the experiment begins and again after the dependent variable has been manipulated by the researcher.

Which statement is most accurate?

Explain the role of randomization in classical experiments.

In _______________ research, a large number of variables that are associated with a small number of cases or subjects are studied.

In most cases, the methods used to select subjects must meet the scientific norm of ____.

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 ____.

Which statement is a potential threat to internal validity in an experimental design?

Experiments are often conducted in public health research where a distinction is made between an efficacy experiment and an effectiveness experiment. Efficacy experiments focus on whether a new health program works under ideal conditions; effectiveness experiments test the program under typical conditions that health professionals encounter in their day-to-day work. Discuss how efficacy experiments and effectiveness experiments reflect concerns about internal validity threats on the one hand and generalizability on the other.

_______________ relates to whether results from experiments conducted in one setting would be obtained in other settings.

The history threat refers to the possibility that ____.

Which technique can be used to help reduce the threat to experimental mortality?