Staying in school really can make you smarter. A new study from Norway finds that students who remain in school longer than their counterparts have higher IQ scores.
In the mid-1950s, the Norwegian government began requiring students to attend school until they were 16 years old, rather than allowing them to drop out at 14.
Communities had until 1972 to phase in the compulsory education reform, which meant that, for nearly 20 years, youngsters in some municipalities went to school for seven years and others attended classes for at least nine years.
That gave Taryn Ann Galloway a unique opportunity to see what impact the extra two years of education had on the intellectual development of students. Galloway, a researcher at the University of Oslo, explains that all young men in Norway are required to undergo a cognitive assessment, or IQ, test for the military draft at age 19.