In some countries, such as sweden and iceland, there is no "math gap" between boys and girls. this is evidence for the explanation of the causes of gender differences.

This is evidence for the "social" explanation of the causes of gender differences.

Social expectation is an internalized social standard for people and associations, therefore for society in general, about what individuals ought to do. It works on two distinct levels, first on specific elite gatherings and afterward on the overall public.