Evidence map›Paper›PMID 31452576›Full record

ArticleCommunications in statistics: Simulation and computation2017

Nonparametric Bootstrap of Sample Means of Positive-Definite Matrices with an Application to Diffusion-Tensor-Imaging Data Analysis.

Leif Ellingson, David Groisser, Daniel Osborne, Vic Patrangenaru, Armin Schwartzman

Abstract read
In one paragraph

Article in Communications in statistics: Simulation and computation, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

3 citing papers in PubMed.

  1. Article
  2. Review
  3. Lognormal Distributions and Geometric Averages of Symmetric Positive Definite Matrices.International statistical review = Revue internationale de statistique · 2016
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Leif EllingsonDepartment of Mathematics and Statistics, Texas Tech University, Lubbock, TX.
David GroisserDepartment of Mathematics, University of Florida, Gainesville, FL.
Daniel OsborneDepartment of Mathematics, Florida Agricultural and Mechanical University, Tallahassee, FL.
Vic PatrangenaruDepartment of Statistics, Florida State University, Tallahasee, FL.
Armin SchwartzmanDepartment of Statistics, North Carolina State University, Raleigh, NC.

Funding

Multiple testing methods for random fields and high-dimensional dependent dataR01CA157528 · NCI · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI SCHWARTZMAN, ARMIN · 2012 to 2017
$1.3M
Statistical Methods for Brain Image Registration and Tensor-Based MorphometryR21EB012177 · NIBIB · CHILDREN'S HOSPITAL OF LOS ANGELES · PI LEPORE, NATASHA · 2011 to 2012
$478k
NCI NIH HHS R01 CA157528NIBIB NIH HHS R21 EB012177
6 · The paper itself

Abstract

This paper presents nonparametric two-sample bootstrap tests formeans of randomsymmetric positivedefinite (SPD) matrices according to two differentmetrics: the Frobenius (or Euclidean)metric, inherited from the embedding of the set of SPD metrics in the Euclidean set of symmetric matrices, and the canonical metric, which is defined without an embedding and suggests an intrinsic analysis. A fast algorithm is used to compute the bootstrap intrinsic means in the case of the latter. The methods are illustrated in a simulation study and applied to a two-group comparison of means of diffusion tensors (DTs) obtained from a single voxel of registered DT images of children in a dyslexia study.

Indexed as

center of massdiffusion tensor imagingextrinsic meanfast algorithmsFréchet meanintrinsic meannon-parametric bootstrap

Identifiers

PMID31452576
PMCPMC6709717

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.