A problem with single-group designs is that
A)they are open to many confounds.
B)there is no comparison group.
C)there is no equivalent control group.
D)all of the above

Question

Quizplus · Accepted Answer

Single-group designs are open to many confounds because there is no comparison or control group, which makes it difficult to determine if any observed changes are due to the intervention or other factors. Without a control group, it is also challenging to establish the causal relationship between the independent variable and the dependent variable. Therefore, A, B, and C are all problems associated with single-group designs.

A Problem with Single-Group Designs Is That