Project M.E.D.I.A (Media Effects on Development from Infancy to Adulthood) is a longitudinal study examining the effects of media (phone usage, social media, TV, books, etc.) on childhood & adolescent development. Project M.E.D.I.A. is the first major research project of its kind. We recruited over 500 families in the Denver, CO area for our study in 2017 (when the children were 0-1 years old), and this year we will be following up with them and collecting more exciting data. Project M.E.D.I.A plans to follow the same children for the next 15-20 years. We collect data by going into the participant's homes and completing a series of tasks and assessments with the children and their parents. This data, combined with survey responses, allows us to learn different ways that the children’s development is influenced by media.