identity involves shared ethnic, linguistic, and cultural characteristics, but not necessarily sovereignty over territory.

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.

they can increase to boost the enonomy.

answer; theory of mind;

answer; cognitive neuroscientist;