In a federal court argued that rehabilitation is the true purpose of the juvenile court and that, without that goal, due process guarantees are violated.

In Inmates of the Boys' Training School vs. Affleck, a federal court argued that rehabilitation is the true purpose of the juvenile court and that, without that goal, due process guarantees are violated.

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.