title: Hypothesis exploration with visualization of variance.
abstract: BACKGROUND
  The Consortium for Neuropsychiatric Phenomics (CNP) at UCLA was an investigation into the biological bases of traits such as memory and response inhibition phenotypes-to explore whether they are linked to syndromes including ADHD, Bipolar disorder, and Schizophrenia. An aim of the consortium was in moving from traditional categorical approaches for psychiatric syndromes towards more quantitative approaches based on large-scale analysis of the space of human variation. It represented an application of phenomics-wide-scale, systematic study of phenotypes-to neuropsychiatry research.
  
  
  RESULTS
  This paper reports on a system for exploration of hypotheses in data obtained from the LA2K, LA3C, and LA5C studies in CNP. ViVA is a system for exploratory data analysis using novel mathematical models and methods for visualization of variance. An example of these methods is called VISOVA, a combination of visualization and analysis of variance, with the flavor of exploration associated with ANOVA in biomedical hypothesis generation. It permits visual identification of phenotype profiles-patterns of values across phenotypes-that characterize groups. Visualization enables screening and refinement of hypotheses about variance structure of sets of phenotypes.
  
  
  CONCLUSIONS
  The ViVA system was designed for exploration of neuropsychiatric hypotheses by interdisciplinary teams. Automated visualization in ViVA supports 'natural selection' on a pool of hypotheses, and permits deeper understanding of the statistical architecture of the data. Large-scale perspective of this kind could lead to better neuropsychiatric diagnostics.
authors.affiliation: Computer Science Department, University of California, Los Angeles, CA, USA ; Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, CA, USA.
authors.forename: Douglass Stott
authors.initials: DS
authors.lastname: Parker
authors.affiliation: Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, CA, USA.
authors.forename: Eliza
authors.initials: E
authors.lastname: Congdon
authors.affiliation: Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, CA, USA ; Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, CA, USA.
authors.forename: Robert M
authors.initials: RM
authors.lastname: Bilder
keywords: ANOVA; Covariance structure; EDA; Hypothesis generation and refinement; Methodologies; Visualization
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