This text examines the MacArthur Longitudinal Twin Study, the goal of which was to assess developmental change between the ages of one and three years, and to offer a framework that explains how changes occur in different domains and how genetics and the environment influence these changes.

Contributors Part I. Introduction 1: Robert N. Emde: The Dynamics of Development in a Unique Multidisciplinary Collaboration 2: John K. Hewitt et al: The Twin Method: What We Can Learn from a Longitudinal Study 3: Joann L. Robinson et al: The Conduct of the Study: sample and Procedures Part II. Temperament 4: Jerome Kagan: The Structure of Teperament 5: Beth Manke et al: Extremes Analyses of Observed Teperament Dimensions 6: Kimberly J. Saudino and Stacey S. Cherny: Parental Ratings of Teperament in Twins 7: Kimberly J. Saudino and Stacey S. Cherny: Sources of Continuity and Change in Observed Temperament 8: Jerome Kagan and Kimberly J. Saudino: Behavioral inhibition and Related Temperaments Part III Emotion 9: Joan L. Robinson and Robert N. Emde: Emotional Development in the Twin Study 10: Robert N. Emde et al: Reactions to Restraint and Anger-Related Expressions during the Second Year 11: Carolyn Zahn-Waxler et al: Empathy and Prosocial Patterns in Young MZ and DZ Twins: Development and Genetic and Environmental Influences 12: Joann L. Robinson et al: Dispositional Cheerfulness: Early Genetic and Environmental Influences Part IV Cognition 13: David W. Fulker and Robert Plomin: Cognition Development, Congiative Abilities, and Modularity 14: Steven M. Wilson et al: Experimental Assessment of Specific Cognitive Abilities during the Second Year of Life 15: Stacey S. Cherny et al: Continuity and Change in General Cognitive Ability from 14 to 36 Months 16: Susan Young et al: Language and Cognition Part V. Environmental Contributions and Cross-Domain Integrations 17: Robert N. Emde: Context and Specificity of Individual Differences and Their Origins 18: Shirly McGuire and Anne-Catherine Roch-Levecq: Mothers' Perceptions of Differential Treatment of Infat Twins 19: Joann L. Robinson: Relationship Context as a Moderator of Sources of Individual Differences in Empathic Development 20: Stacey S. Cherny: The Development of Observed Shyness from 14 to 20 Months: Shyness in Context 21: Charles Martin and Scott Hershberger: Perinatal Effects on General Cognitive Ability, Weight, Height and Temperament 22: Marcie L. Chambers et al: Height, Weight, and Body Mass Index 23: Lorraine F. Kubicek: Temperament, Mental Development, and Language in the Transition from Infancy to Early Childhood 24: Stephanie Schmitz et al: Early Predictors of Problem Behavior at Age Four Part VI Major Themes and Conclusions 25: Robert Plomin et al: An Experiment in Collaborative Science Index

"The first published volume resulting from the MacArthur Longitudinal Twin Study, a collaboration of developmental scientists and behavioral geneticists. They offer an original theoretical framework explaining how changes occur in different domains, and how genetics and the environment influence those changes. Among their findings are that development is multifaceted, genetic and environmental influences vary in magnitude and type depending on the behavior, and genetic factors largely account for continuity while non-shared environmental factors account for change."--SciTech Book News "In this first volume resulting from the MacArthur Longitudinal Twin Study (MLTS), Emde and Hewitt adeptly organized reams of data comparing genetic and environmental influences on developmental changes into six parts and 25 succinct chapters. . .Despite the many contributors to this work (most respected in the field) and the highly technical nature of some of the analyses, the book is a superb illustration of how sound research is conducted and written about. Graduate students through professionals."--CHOICE "The first published volume resulting from the MacArthur Longitudinal Twin Study, a collaboration of developmental scientists and behavioral geneticists. They offer an original theoretical framework explaining how changes occur in different domains, and how genetics and the environment influence those changes. Among their findings are that development is multifaceted, genetic and environmental influences vary in magnitude and type depending on the behavior, and genetic factors largely account for continuity while non-shared environmental factors account for change."--SciTech Book News "In this first volume resulting from the MacArthur Longitudinal Twin Study (MLTS), Emde and Hewitt adeptly organized reams of data comparing genetic and environmental influences on developmental changes into six parts and 25 succinct chapters. . .Despite the many contributors to this work (most respected in the field) and the highly technical nature of some of the analyses, the book is a superb illustration of how sound research is conducted and written about. Graduate students through professionals."--CHOICE