According to a study carried out by professors Daniel and Susan Voyer at the University of New Brunswick, girls perform better than boys because of self-discipline and encouragement. A study by top scientists at the University of Pennsylvania, Martin Seligman and Angela Lee Duckworth, showed that girls have an aptitude for patience, setting goals and actively addressing frustration.
Many parents assume that boys do better in science and math so parents tend to encourage girls to work harder, which gives girls a slight advantage over boys in all subjects. Earlier studies also show that girls read to understand the materials while boys read to get quality grades in final tests. The researchers speculate that girls perform better than boys because of certain social and cultural factors.