What is the primary difference between pretest/posttest designs and within-groups designs?
A)The number of participants used
B)The number of times the dependent variable is measured
C)The number of levels of the independent variable participants are exposed to
D)There is no difference between the two designs.

Question

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The Answer of What is the primary difference between pretest/posttest designs and within-groups designs?
A)The number of participants used
B)The number of times the dependent variable is measured
C)The number of levels of the independent variable participants are exposed to
D)There is no difference between the two designs.

What Is the Primary Difference Between Pretest/posttest Designs and Within-Groups