from Part II - Development of Intelligence
Published online by Cambridge University Press: 13 December 2019
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.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.