Effect size and power for neuroimaging.

Información del proyecto

Neuroimaging power

Identificador del acuerdo de subvención: 706561

DOI

10.3030/706561

Proyecto finalizado el 16 Marzo 2019

Fecha de la firma de la CE 1 Septiembre 2016

Fecha de inicio 1 Noviembre 2016

Fecha de finalización 31 Octubre 2019

Financiado con arreglo a

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Coste total

€ 264 668,40

Aportación de la UE

€ 264 668,40

Coordinado por

INSTITUT NATIONAL DE RECHERCHE EN INFORMATIQUE ET AUTOMATIQUE
France

Objetivo

There is an increasing concern about statistical power in neuroscience research. Critically, an underpowered study has poor predictive power. Findings from a low-power study are unlikely to be reproducible, and thus a power analysis is a critical component of any paper. This project aims to promote and facilitate the use of power analyses.
A key component of a power analysis is the specification of an effect size. However, in neuroimaging, there is no standardised way to communicate effect sizes, which makes the choice of an appropriate effect size a formidable task. The best way today to perform a power analysis is by collecting a pilot data set, a very expensive practice. To eliminate the need for pilot data, we will develop a standardised measure of effect size taking into account the spatial variance and the uncertainty of the measurements. Communicating effect sizes in new publications will facilitate the use of power analyses.
To further alleviate the need for pilot data, we will provide a library of effect sizes for different tasks and contrasts, using open data projects in neuroimaging. We will integrate our effect size estimator in open repositories NeuroVault and OpenfMRI. Consequently, these effect sizes can then serve as a proxy for a pilot study, and as such, a huge cost in the design of an experiment is eliminated.
A new experiment will not be identical to the open data and as such the hypothesised parameters might not be fully accurate. To address this issue, we present a flexible framework to analyse data mid-way without harming the control of the type I error rate. Such a procedure will allow re-evaluating halfway an experiment whether it is useful to continue a study, and how many more subjects are needed for statistically sound inferences.
To make our methods maximally available, we will write a software suite including all these methods in different programming platforms and we will provide a GUI to further increase the use of power analyses.

Ámbito científico (EuroSciVoc)

• ciencias naturales › ciencias biológicas › neurobiología
• ciencias naturales › informática y ciencias de la información › software

Palabras clave

• Reproducibility
• power
• statistics
• sensitivity
• neuroimaging
• fMRI
• sample size
• effect size

Programa(s)

• H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions PROGRAMA PRINCIPAL
  
• H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility
  

Tema(s)

• MSCA-IF-2015-GF - Marie Skłodowska-Curie Individual Fellowships (IF-GF)
  

Régimen de financiación

MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)

Convocatoria de propuestas

H2020-MSCA-IF-2015

Coordinador

INSTITUT NATIONAL DE RECHERCHE EN INFORMATIQUE ET AUTOMATIQUE

• Aportación neta de la UEn: € 264 668,40
• Dirección: DOMAINE DE VOLUCEAU ROCQUENCOURT ; 78153 Le Chesnay Cedex ; Francia
• Tipo de actividad: Research Organisations
• Coste total: € 264 668,40

Socios (1)

Socio

BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY

Estados Unidos

• Aportación neta de la UEn: € 0,00
• Dirección: SERRA MALL 450 ; 94305 2004 STANFORD
• Tipo de actividad: Higher or Secondary Education Establishments
• Coste total: € 172 130,40