Under which of the following circumstances would a researcher use a quasi-experimental design?
A) Experimenter must employ a pretest.
B) Experimenter must collect all the data him/herself.
C) Experimenter cannot assign subjects to conditions.
D) There is more than one independent variable.
E) The pretest has a reactive effect.

Question

Quizplus · Accepted Answer

Quasi-experimental designs are used when the experimenter cannot assign subjects to conditions, such as when using pre-existing groups or when testing interventions that cannot be randomly assigned. Therefore, option C is the best choice. Options A, B and E are not specific to quasi-experimental designs and can be used in other types of experimental designs as well. Option D suggests the use of factorial designs, which are a type of experimental design that includes more than one independent variable.

Under Which of the Following Circumstances Would a Researcher Use