Life-Span Human Development - Carol Sigelman, Elizabeth Rider - Google Books

http://books.google.de/books?id=Nn8tgkPSKB4C&pg=PT109&dq=heritability+of+IQ+increase+with+age&hl=de&ei=qk12TI_3MdH24gap5vjVBg&sa

Known for its clear, straightforward writing style, comprehensive coverage, strong and current research-based approach, and excellent visuals and tables, LIFE-SPAN HUMAN DEVELOPMENT offers sections on four life stages: infancy, childhood, adolescence, and…