One of the best-known longitudinal designs is Lewis Terman's study of giftedness. He began tracking gifted children

Question:

One of the best-known longitudinal designs is Lewis Terman's study of giftedness. He began tracking gifted children into adolescence and adulthood in 1925; the study is supposed to conclude in 2020. Explain the unique benefits of such a study, and then explain the problems caused by this type of design.