Identify the statistical design-case 13

A psychiatrist wanted to test the effects of four new drugs on schizophrenic patients. He randomly selected 40 schizophrenic patients and randomly assigned them to four groups 10 patients per group. Group 1 received Drug 1, Group 2 received Drug 2, Group 3 received Drug 3, Group 4 received Drug 4. At the end of a thirty day treatment with these drugs, he gave the patients a test that measured incidence of psychotic behavior. He reported his findings in graphs showing the number of patients in each group that showed improvement. Identify the statistical design. Give your answer in the comments space below.