The same year, he began studying philosophy at the University of Copenhagen; he graduated with a master's degree in psychology in 1901.
In it and a report to the parliament the same year, Guðmundur put forward his proposals for the education of children in Iceland.
[8] In 1908 to 1910 Guðmundur worked on his PhD thesis for the University of Copenhagen, titled Samúðarskilningurinn (Sympathetic understanding).
[9] His thesis defence took place in 1911,[2] and his book on the same topic, Hugur og heimur (Mind and the universe), was published in 1912.
[10] In 1918 he was appointed professor at the University, and served in that position until 1924, teaching applied psychology and performing experiments with students.