McKenna Designs a Study in Which She Has Two Control

McKenna designs a study in which she has two control and two experimental groups.In her design,one control group receives a pretest while the other does not,and one experimental group receives a pretest while the other does not.McKenna's design is an example of a _____ design.

A) four-group pretest-posttest
B) Solomon four-group
C) two-group control
D) one-group control-one-group experimental

Correct Answer:

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