See Susan Elsley's article in Children in Scotland, cited below, in which she summarises surveys she has done with children in the P6 and S2 age groups about their reading interests and their views on how childhood is portrayed in children's books. The work formed the basis of a thesis at Edinburgh University, Heroes and heroines or just like us?
Elsley, S. (2009). Not just The Little House on the Prairie. Children in Scotland, 100, pp.20-21.