Cited by 59Functional Brain Connectivity StudiesGaussian Processes and Bayesian InferenceNeural and Behavioral Psychology Studies

Bayesian multi-task learning for decoding multi-subject neuroimaging data

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Marquand, Andre F., Brammer, Michael, Williams, Steven C.R., Doyle, Orla M.·2014·NeuroImage

Abstract

Decoding models based on pattern recognition (PR) are becoming increasingly important tools for neuroimaging data analysis. In contrast to alternative (mass-univariate) encoding approaches that use hierarchical models to capture inter-subject variability, inter-subject differences are not typically handled efficiently in PR. In this work, we propose to overcome this problem by recasting the decoding problem in a multi-task learning (MTL) framework. In MTL, a single PR model is used to learn different but related "tasks" simultaneously. The primary advantage of MTL is that it makes more efficient use of the data available and leads to more accurate models by making use of the relationships between tasks. In this work, we construct MTL models where each subject is modelled by a separate task. We use a flexible covariance structure to model the relationships between tasks and induce coupling between them using Gaussian process priors. We present an MTL method for classification problems and demonstrate a novel mapping method suitable for PR models. We apply these MTL approaches to classifying many different contrasts in a publicly available fMRI dataset and show that the proposed MTL methods produce higher decoding accuracy and more consistent discriminative activity patterns than currently used techniques. Our results demonstrate that MTL provides a promising method for multi-subject decoding studies by focusing on the commonalities between a group of subjects rather than the idiosyncratic properties of different subjects.

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Authors
Marquand, A. F., Brammer, M., Williams, S. C. R., & Doyle, O. M.
Venue
NeuroImage
Publisher
Elsevier BV
Published
2014-05
Volume
92
Pages
298-311
ISSN
1053-8119 (ISSN-L)
OpenAlex
W2110185148
Cited by
59
References
69
Citations by year
2026: 1 · 2024: 3 · 2023: 4 · 2022: 6 · 2021: 4 · 2020: 3 · 2019: 9 · 2018: 6 · 2017: 7 · 2016: 2 · 2015: 7 · 2014: 7
FWCI
4.28
Type
journal article
Language
en
Open access
Locations
  • NeuroImage (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Research Portal (King's College London) (publishedVersion, other-oa)
  • Radboud Repository (Radboud University) (submittedVersion)
Funders
  • King's College London Centre of Excellence in Medical Engineering
  • Wellcome Trust
  • EPSRC (WT088641/Z/09/Z)
  • Innovative Medicines Initiative Joint Undertaking (115008 (NEWMEDS))
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Physical Sciences › Computer Science › Artificial Intelligence › Gaussian Processes and Bayesian Inference
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
Keywords
multi-task learning, Bayesian decoding, pattern recognition, interindividual variability, Gaussian process priors, covariance structure, fMRI classification, decoding accuracy
MeSH terms
Adolescent, Adult, Algorithms, Artificial Intelligence, Bayes Theorem, Brain Mapping, Female, Humans, Image Interpretation, Computer-Assisted, Male, Pattern Recognition, Automated, Pattern Recognition, Visual, Sensitivity and Specificity, Visual Cortex, Reproducibility of Results, Young Adult, Memory, Episodic

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