The posttest-only design with nonequivalent groups is likely to control for which of the following threats to internal validity: a. History b. Differential selection c. additive and interactive effects d. differential attrition

The posttest-only design with nonequivalent groups is likely to control for which of the
following threats to internal validity:
a. History
b. Differential selection

c. additive and interactive effects
d. differential attrition
by

1 Answer

Answer :

a. History
by

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