The<unk>  is a research method developed by Richard<unk>  in 1949. It is sometimes used in social science, psychology and medicine. It can be used if there are concerns that the treatment might be sensitized by the pre-test. The<unk><unk> s have<unk>  different experiences: # Pre-test, treatment, post-test # Pre-test, no treatment, post-test # Treatment, post-test # No treatment, post-test The effectiveness of the treatment can be evaluated by comparisons between<unk> s 1 and 3 and between<unk> s 2 and 4. Various statistical treatments for the<unk>  have been put forward, including Stouffer's Z and Monte Carlo.
Solomon four-group design
Multiple baseline design
Blinded experiment
N of 1 trial
Clinical study design
Parallel study
Natural history study
Intersalt study