Which of the following is least suited to providing clear evidence about a causal relationship between two variables?
A)Classical experimental design
B)Solomon four-group design
C)Post-test only control group design
D)One-shot case study
E)All of the above are equally effective.

Question

Quizplus · Accepted Answer

One-shot case study is the least suited to provide clear evidence about a causal relationship between two variables as it only involves measuring the effect after the intervention rather than having a control group or random assignment of participants to groups. The other designs listed involve more rigorous control and manipulation of variables to establish a causal relationship.

Which of the Following Is Least Suited to Providing Clear