Author Question: Identify an advantage of the randomized subjects control-group, posttest only design in comparison ... (Read 89 times)

Starlight · **on:** Jun 20, 2018

Identify an advantage of the randomized subjects control-group, posttest only design in comparison to the randomized subjects, control-group, pretest-posttest design.

What will be an ideal response?

Question 2

Counterbalancing is a technique that controls for

a. lack of random assignment.
b. failure to use a double blind technique.
c. experimenter effect.
d. order and carryover effects.
e. diffusion.

aburgess · **Reply #1 on:** Jun 20, 2018

Answer to Question 1

The randomized subjects control-group, posttest design does not use a pretest. This is advantageous in situations where (a) a pretest is not available or is not appropriate for the subjects and (b) where there might be an interaction effect between the pretest and the independent variable. By not having a pretest, one threat to internal validity is eliminated.

Answer to Question 2

D