True experimental designs differ from pre-experimental designs in that _____.
A) true experimental designs use random assignment
B) pre-experimental designs include the use of a control group
C) pre-experimental designs include the use of pre-tests
D) true experimental designs include multiple treatment groups
E) pre-experimental designs have fewer threats to internal validity

Question

Quizplus · Accepted Answer

True experimental designs use random assignment, which is not necessarily included in pre-experimental designs. The other options are not accurate distinctions between the two types of designs.

True Experimental Designs Differ from Pre-Experimental Designs in That _____