Before revision: Criticism However, as regards certain personality traits, like the degree of introversion or of sourness, there was an research carried out by psychologists at Michigan State University and the University of Minnesota, based on a relatively huge data base of 1,296 couples who have been married for an average of 19.8 years, suggesting that only the degree of aggressivity actually tended to converge.
After revision: Criticism However, as regards certain personality traits, like the degree of introversion or of sourness, there was research carried out by psychologists at Michigan State University and the University of Minnesota, based on a relatively huge data base of 1,296 couples who have been married for an average of 19.8 years, suggesting that only the degree of aggressivity actually tended to converge.