Acta Geneticae Medicae Et Gemellologiae Twin Research

Reviews and evaluates psychological studies of separately raised identical twins and suggests which aspects of human experience are largely shaped by one's heredity.

Information on the special needs and natures of twins and multiples is often difficult for professionals to obtain. Twin and Triplet Psychology fills this gap, helping professionals to be better-equipped to offer advice to parents and twins alike. Examining the psychology of twinship throughout the lifespan, the book includes chapters on: * twins in-utero temperament development and inter-twin behaviour before and after birth * antenatal and postnatal influences on family relationships * twins with special needs * the death of a twin * twins in secondary school and adolescence.

Behavioral genetics is a fast-growing, multidisciplinary field which attempts to explain the influence of genetic and environmental factors on behavior through the lifespan. The preferred investigative technique for teasing out the differences between genetics and the environment is the longitudinal twin study. This book is the first complete publication from the MacArthur Longitudinal Twin Study (MALTS) that is by far the most ambitious and comprehensive longitudinal twin study to date. The goal of such an in-depth study was not to merely provide thorough descriptions of developmental change between the ages of one and three years, but to offer an original theoretical framework that explains how change occurs in different domains and how genetics and the environment influence those changes. This rigorous study will set the agenda for developmental psychology and behavioral genetics for decades to come.

The advent of hormonal infertility treatments and in vitro fertilization techniques have led to a sharp increase in the number of quadruplet and higher-order conceptions in recent years. Improved neonatal care and nutrition have meant that many more of these babies survive. Yet it appears that very little research has been done into the lives of such children and the psychodevelopmental consequences of their multiple status. In this book, Marie M. Clay brings together what is known from historical records and reports in the medical, psychological, and popular press. She points to the contribution that research studies on higher multiple sets could make to our understanding of genetic-environmental interactions and gives valuable methodological advice for those wishing to initiate such a study. Changes in social practices and medical knowledge are highlighted, various aspects of pregnancy and birth are discussed, and the practical and emotional problems faced by families of multiple sets are sensitively described. Appended to the book are an illustrated "Catalog" of quadruplet case reports gleaned from the literature, including birth details and postnatal histories, plus a directory of multiple birth associations, support groups, and study centers around the world.

The Trouble with Twin Studies questions popular genetic explanations of human behavioral differences based upon the existing body of twin research. Psychologist Jay Joseph outlines the fallacies of twin studies in the context of the ongoing decades-long failure to discover genes for human behavioral differences, including IQ, personality, and the major psychiatric disorders. This volume critically examines twin research, with a special emphasis on reared-apart twin studies, and incorporates new and updated perspectives, analyses, arguments, and evidence.

Despite the fact that most people become parents and everyone who has ever lived has had parents, parenting remains a mystifying subject about which almost everyone has opinions, but about which few people agree. Striking permutations on the theme of parenting are emerging--single parenthood, blended families, lesbian and gay parents, and teen versus fifties first-time moms and dads. Divided into four volumes, the Handbook of Parenting is concerned with different types of parents, basic characteristics of parenting, forces that shape parenting, problems faced by parents, and the practical sides of parenting. Contributors have worked in different ways toward understanding all of these diverse aspects of parenting and look to the most recent research and thinking in the field to shed light on many topics every parent has wondered about. Because development is too subtle, dynamic, and intricate to admit that parental caregiving alone determines the course and outcome of ontogeny, volume 1 concerns how children influence parenting. Volume 2 relates parenting to its biological roots and sets parenting in its ecological framework. Volume 3 distinguishes among the cast of characters responsible for parenting and is revealing of the psychological make-ups and social interests of those individuals. Volume 4 describes problems of parenting as well as the promotion of positive parenting practices. Written to be read and absorbed in a single sitting, each chapter addresses a different but central topic in parenting, and is rooted in current thinking and theory as well as classic and modern research on that topic. All chapters follow a standard organization including an introduction to the chapter as a whole followed by historical considerations of the topic, a discussion of central issues and theory, a review of classic and modern research, forecasts of future directions for theory and research, and a conclusion. In addition to considering their own convictions and research, the chapter contributors present and broadly interpret all major points of view and central lines of inquiry.