Question

Wilhelm Wundt discovered the time it took for people to become consciously aware of sound. His study is considered to be the first ... observational study , psychological experiment , psychological perspective , theological discovery

Answer 1

It wasn’t until the 19th century that psychology went from a bunch of smart people talking and writing about how they think the brain works to a scientific area of study. Psychology as a science all started in 1879 with a German professor named Wilhelm Wundt. He conducted what is considered the very first official psychological experiment. His goal was to measure how long it took for people to hear and respond to a sound. Wundt’s experiments earned him the unofficial title of “the father of psychology.”

Answer 2

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.