Milroy's Belfast Study . . .

During his studies in Belfast Milroy investigated three working-class communities, Ballymacarrett (a Protestant area in East Belfast), the Hammer (a Protestant area in West Belfast) and the Clonard (a Catholic area in West Belfast), all of these areas had a high rate of unemployment. She found that the Hammer and the Clonard communities both had unemployment rates of around 35%, which the study shows affected the social relationships.
Men from these areas were shown to be doing more domestic tasks and the communities seem to have blurred stereotypical gender roles with men and women swapping 'duties' around the house. When researching in to this Milroy used both an interview style and a spontaneous style of questioning, revealing older men used slang in both types of questioning.
She discovered that men used rounded vowels 61% of the time where as women only used the 20% of the time. The conclusion Milroy drew from this was that women are more linguistically aware/ better at languages generally, they make a better effort to use the pronunciation they judge as appropriate to the situation, also ''women were much more inclined than men to look for work outside the locality'' meaning they had weaker links. 

Bibliography

http://www.putlearningfirst.com/language/research/milroy.html

https://prezi.com/imbhlnfxy2re/milroy-and-milroy-belfast-study/