Which of the following might an experimental design lack, resulting in its classification as a pre-experimental design
A)an experimental stimulus
B)an independent variable
C)random assignment to conditions
D)a design would have to lack all of these in order to be classified as a pre-experimental design

Question

Quizplus · Accepted Answer

Pre-experimental designs often lack random assignment to conditions, which is crucial for controlling for extraneous variables and establishing causality. The presence of an experimental stimulus and an independent variable are typical in both experimental and pre-experimental designs, but the lack of random assignment is a key factor that differentiates pre-experimental designs from true experimental designs.

Which of the Following Might an Experimental Design Lack, Resulting