I'm performing a research on parents' knowledge of media usage by their children in a preschool age in Poland. I'm interested in the factors, such as level of parent's education, social status, and its influence on the variety of media and time spent with media by children at home. The crucial question is how much time do they spend with media being aware of it and do their parents know how to show them the positive and negative aspects of media. Can you recommend me some research related to my interests and literature?