四年没戏，最短也要5年，深坑专业时间更长

 

Averages by Field of Study

According to Joseph Berger of the New York Times, the average length of a dissertation program today is 8.2 years (2). Terminal degrees in the hard sciences typically take a slightly shorter time to complete than do degrees in education and the humanities. The field of physics has a current average of five years. The psychology field averages five to seven years. New doctoral students in the fields of history or english can expect to spend eight years completing the degree. Some fields of study require a significantly longer degree process. For example, in the field of education, the current average is 13 years.