Why do they call the united state court system a dual system

The framers of the Constitution wanted to create a third branch of the government, equal to the others. This is the federal judiciary. At the same time, they feared overreaching federal power, so they limited the power, or jurisdiction, of the federal courts. This has led to a dual court system, with each having its own key role.

Explanation:

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

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.