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Catherine A. Sugar

Researcher at University of California, Los Angeles

Publications -  194
Citations -  11306

Catherine A. Sugar is an academic researcher from University of California, Los Angeles. The author has contributed to research in topics: Autism & Schizophrenia. The author has an hindex of 53, co-authored 174 publications receiving 9082 citations. Previous affiliations of Catherine A. Sugar include United States Department of Veterans Affairs & Semel Institute for Neuroscience and Human Behavior.

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Journal ArticleDOI

Finding the Number of Clusters in a Dataset

Catherine A. Sugar, +1 more
- 01 Sep 2003 - 
TL;DR: A simple, yet powerful nonparametric method for choosing the number of clusters based on distortion, a quantity that measures the average distance, per dimension, between each observation and its closest cluster center, is developed.
Journal ArticleDOI

Mapping genomic loci implicates genes and synaptic biology in schizophrenia

Vassily Trubetskoy, +432 more
- 08 Apr 2022 - 
TL;DR: In this article , a two-stage genome-wide association study of up to 76,755 individuals with schizophrenia and 243,649 control individuals was conducted, and the authors reported common variant associations at 287 distinct genomic loci.
Journal ArticleDOI

Clustering for Sparsely Sampled Functional Data

Gareth M. James, +1 more
- 01 Jun 2003 - 
TL;DR: A flexible model-based procedure for clustering functional data that can be applied to all types of curve data but is particularly useful when individuals are observed at a sparse set of time points is developed.
Book

Principal component models for sparse functional data

Gareth M. James, +2 more
TL;DR: In this article, a reduced rank mixed effects framework is proposed to handle the more difficult case where curves are often measured at an irregular and sparse set of time points which can differ widely across individuals.
Journal ArticleDOI

Social Cognition in Schizophrenia, Part 1: Performance Across Phase of Illness

Michael F. Green, +21 more
- 18 Jun 2012 - 
TL;DR: The findings suggest that social cognition in these 3 domains fits a stable pattern that has outcome and treatment implications, and social cognitive performance was impaired across all domains of social cognition and in all clinical samples.