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"Little, Roger"
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Image processing and analysis methods for the Adolescent Brain Cognitive Development Study
The Adolescent Brain Cognitive Development (ABCD) Study is an ongoing, nationwide study of the effects of environmental influences on behavioral and brain development in adolescents. The main objective of the study is to recruit and assess over eleven thousand 9-10-year-olds and follow them over the course of 10 years to characterize normative brain and cognitive development, the many factors that influence brain development, and the effects of those factors on mental health and other outcomes. The study employs state-of-the-art multimodal brain imaging, cognitive and clinical assessments, bioassays, and careful assessment of substance use, environment, psychopathological symptoms, and social functioning. The data is a resource of unprecedented scale and depth for studying typical and atypical development. The aim of this manuscript is to describe the baseline neuroimaging processing and subject-level analysis methods used by ABCD. Processing and analyses include modality-specific corrections for distortions and motion, brain segmentation and cortical surface reconstruction derived from structural magnetic resonance imaging (sMRI), analysis of brain microstructure using diffusion MRI (dMRI), task-related analysis of functional MRI (fMRI), and functional connectivity analysis of resting-state fMRI. This manuscript serves as a methodological reference for users of publicly shared neuroimaging data from the ABCD Study.
•An overview of the MRI processing pipeline for the ABCD Study.•A discussion on the challenges of large, multisite population studies.•A methodological reference for users of publicly shared data from the ABCD Study.•Preliminary results from technical survey of baseline dataset.
Journal Article
Little Miss Lucky
One winter night Little Miss Lucky leaves her cottage and experiences a terrible adventure with a pleasantly surprising conclusion.
Book
The Genotype-Tissue Expression (GTEx) pilot analysis: Multitissue gene regulation in humans
Understanding the functional consequences of genetic variation, and how it affects complex human disease and quantitative traits, remains a critical challenge for biomedicine. We present an analysis of RNA sequencing data from 1641 samples across 43 tissues from 175 individuals, generated as part of the pilot phase of the Genotype-Tissue Expression (GTEx) project. We describe the landscape of gene expression across tissues, catalog thousands of tissue-specific and shared regulatory expression quantitative trait loci (eQTL) variants, describe complex network relationships, and identify signals from genome-wide association studies explained by eQTLs. These findings provide a systematic understanding of the cellular and biological consequences of human genetic variation and of the heterogeneity of such effects among a diverse set of human tissues.
Journal Article
Little Miss Bossy
Wilfred the Wizard cures Little Miss Bossy's problem with a wizardy word and a pair of magic boots.
Book
Honey I Love You, but … Investigating the Causes of the Earnings Penalty of Being a Tied-migrant Military Spouse
Prior empirical research on the earnings penalty of being a tied-migrant has focused primarily on the working wives of servicemen. Over the last couple of decades the increased number of women in the armed forces makes it feasible to study the earnings of another group of tied-migrants, the husbands of servicewomen. Using data from the 2000 U.S. Census, Sample Edited Detail File (SEDF), we show that there is a consistently lower age-earnings pattern for military husbands as well as wives. These annual earnings patterns capture the essence of, but do not provide an explanation for, the observed annual earnings differences. These differences are evaluated using multivariate analysis accounting for sample selectivity. Moreover, decomposition analysis strongly suggests that demand-side factors account for a greater portion of the differences in annual earnings than has been previously acknowledged and, therefore, that retention might respond favorably to job matching assistance and/or employer hiring incentives offered military spouses.
Journal Article
Little Miss Shy
Miss Shy is terrified of leaving her house and meeting people until Mr. Funny whisks her off to his party.
Book
