The perspective that does not rigidly believe in any one theoretical perspective but considers multiple theories and selects the best features from each is known as theoretical orientation.

Eclectic

Explanation: Eclectic theory employs a robust perspective which synergise various approaches at tackling or solving a particular problem by exploring multiple principles aimed at solving such problem. It deviates from a rather straightforward and specific approach. Eclectic theories are employed in psychological therapies, teaching and so on. They usually yield better and well rounded result due to their robust nature which combines the best features of multiple approaches suitable for a specific problem or treatment.

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.

answer; approx,300,000 ;