Before-and-after designs are distinguished from other quasi-experimental designs by which of the following?
A) the absence of a traditional comparison group
B) a comparison group designated after the treatment is administered
C) a posttest-only comparison group
D) random assignment to a comparison group

Question

Quizplus · Accepted Answer

Before-and-after designs typically lack a traditional comparison group, focusing instead on comparing conditions or outcomes for the same subjects before and after an intervention.

Before-And-After Designs Are Distinguished from Other Quasi-Experimental Designs by Which