The correct answer is "conducted the first psychological experiment."
In the 19th century, psychology became a scientific discipline when German professor Wilhelm Wundt conducted the first psychological experiment.
Wilhelm Wundt discovered the time it took for people to become consciously aware of sound. For this reason, his study was considered to be the first psychological experiment in 1879. He applied the scientific method to analyze a situation or phenomena in psychology. For many scientists, Wundt is considered one of the most important people in the field of psychology.
