The largest experimental statistical study ever conducted is believed to be for

The largest experimental statistical study that has happened in the past and was conducted for is the Public Health Service Experiment that has happened in the year 1954, this experiment has been conducted because of the Salk Vaccine, which is also known as the Polio Vaccine.

disorders of the brain include both behavior disorders and other psychiatric illnesses. the primary difference between a behavior disorder and another type of psychiatric disorder is the presence of choice. psychiatric conditions are considered to be involuntary while in behavior disorders, choices are essential.