According to recent research, competition for spots in colleges is decreasing in Japan. This is related primarily to

a decrease in the number of college age people because of the low birthrate.

Explanation:

In Japan, reticence to marry or have kids has quite likely resulted, at least partly, in a reduction in job prospects for young people. Throughout 1960, 97% of people between the ages of 25 and 29 were working, however by 2010 this figure had fallen to 86%.

Due to such conditions in the past, the level of young individuals have decreased over time leading to decreasing college spots.

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.

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