The psychology of twinship hardcover april 1 1997 by ricardo c ainslie author 41 out of 5 stars 3 ratings see all formats and editions hide other formats and editions amazon price new from used from hardcover please retry cdn 5595 cdn 5595 cdn 1448 hardcover cdn 5595 10 used from cdn 1448 2 new from cdn 5595 taking a life span approach ainslie uses interview . The psychology of twinship ainslie ricardo c 9780803210172 books amazonca skip to main contentca hello select your address books hello sign in account lists account returns orders cart all best sellers gift ideas prime new . The psychology of twinship book read reviews from worlds largest community for readers twins have been a subject of fascination and awe from time imme. These are just a few of the issues discussed in a completely revised second edition of this book about twins the psychology of twinship by dr ricardo ainslie calling on recent research including studies of twins separated at birth dr ainslie examines the complex interactions between heredity and environment especially with reference to personality and intelligence full of in depth . The special relationship between twins allows researchers to examine the differences between genetic and environmental influences over both physical and mental health as well as traits and