Journal
JOURNAL OF ADOLESCENCE
Volume 36, Issue 2, Pages 245-255Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.adolescence.2012.10.006
Keywords
Decision-making; Iowa Gambling Task; Genetics; Twins
Categories
Funding
- NIMH NIH HHS [K02 MH001114, R01 MH058354, R01 MH58354, K02 MH01114-08] Funding Source: Medline
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The present study examined the genetic and environmental etiology of decision-making (Iowa Gambling Task; Bechara, Damasio, Damasio, & Anderson, 1994), in a sample of twins at ages 11-13,14-15, and 16-18 years. The variance across five 20-trial blocks could be explained by a latent decision-making factor within each of the three times of IGT administration. This latent factor was modestly influenced by genetic factors, explaining 35%, 20% and 46% of the variance within each of the three times of IGT administration. The remaining variance was explained by the non-shared environment (65%, 80% and 54%, respectively). Block-specific non-shared environmental influences were also observed. The stability of decision-making was modest across development. Youth showed a trend to choose less risky decks at later ages, suggesting some improvement in task performance across development. These findings contribute to our understanding of decision-making by highlighting the particular importance of each person's unique experiences on individual differences. (C) 2012 The Foundation for Professionals in Services for Adolescents. Published by Elsevier Ltd. All rights reserved.
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