Book contents
- The Cambridge Handbook of Intelligence
- The Cambridge Handbook of Intelligence
- Copyright page
- Dedication
- Contents
- Figures
- Tables
- Contributors
- Preface
- Part I Intelligence and Its Measurement
- Part II Development of Intelligence
- 6 Genetic Bases of Intelligence
- 7 Intelligence in Infancy
- 8 Intelligence in Childhood
- 9 Intelligence in Adulthood
- 10 Developing Intelligence through Instruction
- Part III Intelligence and Group Differences
- Part IV Biology of Intelligence
- Part V Intelligence and Information Processing
- Part VI Kinds of Intelligence
- Part VII Intelligence and Its Role in Society
- Part VIII Intelligence and Allied Constructs
- Part IX Folk Conceptions of Intelligence
- Part X Conclusion
- Author Index
- Subject Index
- References
6 - Genetic Bases of Intelligence
from Part II - Development of Intelligence
Published online by Cambridge University Press: 13 December 2019
- The Cambridge Handbook of Intelligence
- The Cambridge Handbook of Intelligence
- Copyright page
- Dedication
- Contents
- Figures
- Tables
- Contributors
- Preface
- Part I Intelligence and Its Measurement
- Part II Development of Intelligence
- 6 Genetic Bases of Intelligence
- 7 Intelligence in Infancy
- 8 Intelligence in Childhood
- 9 Intelligence in Adulthood
- 10 Developing Intelligence through Instruction
- Part III Intelligence and Group Differences
- Part IV Biology of Intelligence
- Part V Intelligence and Information Processing
- Part VI Kinds of Intelligence
- Part VII Intelligence and Its Role in Society
- Part VIII Intelligence and Allied Constructs
- Part IX Folk Conceptions of Intelligence
- Part X Conclusion
- Author Index
- Subject Index
- References
Summary
Considering the continuing interest of the scientific community and the public in the genetic bases of intelligence, in this chapter we highlight three facets of the numerous studies in this broad area: (1) the trajectory of studies that have sought to elucidate the etiology of intelligence; (2) the relevance of the selected phenotype; and (3) the consequence of the chosen genetic mechanism. The use of three main approaches to the study of the genetic bases of intelligence (the linkage studies focused on heritability of the phenotypic trait, hypothesis-driven candidate region and gene studies, and genome-wide association studies) has resulted in a list of about 150 genes apparently associated with intelligence, but the discrepancy between the heritability estimates obtained in quantitative versus molecular genetic studies persists. One explanation of this discrepancy relates to the heterogeneity of the phenotypes often used in quantitative versus molecular genetic studies. The other states that, in addition to the genetic mechanism sampled by genome-wide association studies (i.e., the common variance-based mechanism), there may be other genetic mechanisms that influence individual differences in intelligence, in particular, epigenetic mechanisms. Their consideration may become a course-changing innovation for understanding the genetic bases of intelligence and providing a window onto the diversity of human abilities.
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- Chapter
- Information
- The Cambridge Handbook of Intelligence , pp. 101 - 123Publisher: Cambridge University PressPrint publication year: 2020
References
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