The headline is misleading because:

"The cross-cultural study included some 2,300 university students from the United States, Brazil, China, Germany, Ghana, Israel, Poland and Singapore."

Think about all the factors that can keep a student from normal life and from living a full emotional life. such as

hard studying
not enough sleep
debt
having to work and go to school
worry about getting a good job after school
possible non-acceptance by peers
drugs

By the time I was a senior in college, I wanted only one thing in life - sleep.