Search Results - "Worsley, K.J"

A General Statistical Analysis for fMRI Data by Worsley, K.J., Liao, C.H., Aston, J., Petre, V., Duncan, G.H., Morales, F., Evans, A.C.

“…We propose a method for the statistical analysis of fMRI data that seeks a compromise between efficiency, generality, validity, simplicity, and execution…”
Get full text

An improved theoretical P value for SPMs based on discrete local maxima by Worsley, K.J.

“…We present a new continuity correction to the P value for local maxima of a statistical parametric map that bridges the gap between small FWHM, when the…”
Get full text

Analysis of fMRI Time-Series Revisited—Again by Worsley, K.J., Friston, K.J.

“…Friston et al. (1995, NeuroImage 2:45-53) presented a method for detecting activations in fMR1 time-series based on the general linear model and a heuristic…”
Get full text

Combining Spatial Extent and Peak Intensity to Test for Activations in Functional Imaging by Poline, J-B., Worsley, K.J., Evans, A.C., Friston, K.J.

“…Within the framework of statistical mapping, there are up to now only two tests used to assess the regional significance in functional images. One is based on…”
Get full text

Detecting fMRI activation allowing for unknown latency of the hemodynamic response by Worsley, K.J., Taylor, J.E.

“…Several authors have suggested allowing for unknown latency of the hemodynamic response by incorporation of hemodynamic derivative terms into the linear model…”
Get full text

On the geometry of a generalized cross-correlation random field by Carbonell, F., Worsley, K.J.

“…Studying the geometry of random fields (RF) has become a well established tool for dealing with the statistical problem of multiple comparisons. This has led…”
Get full text

Rotation Space Random Fields with an Application to fMRI Data by Shafie, K., Sigal, B., Siegmund, D., Worsley, K. J.

“…Siegmund and Worsley considered the problem of testing for a signal with unknown location and scale in a Gaussian random field defined on Rn. The test…”
Get full text

The geometry of time-varying cross-correlation random fields by Carbonell, F., Worsley, K.J., Trujillo-Barreto, N.J., Vega-Hernandez, M.

“…The goal of this paper is to assess the P -value of local maxima of time-varying cross-correlation random fields. The motivation for this comes from an…”
Get full text

On the Fisher’s Z transformation of correlation random fields by Carbonell, F., Worsley, K.J., Trujillo-Barreto, N.J.

“…One of the most interesting problems studied in Random Field Theory (RFT) is to approximate the distribution of the maximum of a random field. This problem…”
Get full text

Multisubject fMRI Studies and Conjunction Analyses by Friston, K.J., Holmes, A.P., Price, C.J., Büchel, C., Worsley, K.J.

“…In this paper we present an approach to making inferences about generic activations in groups of subjects using fMRI. In particular we suggest that activations…”
Get full text

Structural Asymmetries in the Human Brain: a Voxel-based Statistical Analysis of 142 MRI Scans by Watkins, K.E., Paus, T., Lerch, J.P., Zijdenbos, A., Collins, D.L., Neelin, P., Taylor, J., Worsley, K.J., Evans, A.C.

“…The use of computational approaches in the analysis of highresolution magnetic resonance images (MRI) of the human brain provides a powerful tool for in vivo…”
Get full text

Detecting changes in nonisotropic images by Worsley, K.J., Andermann, M., Koulis, T., MacDonald, D., Evans, A.C.

“…If the noise component of image data is nonisotropic, i.e., if it has nonconstant smoothness or effective point spread function, then theoretical results for…”
Get full text

A Unified Statistical Approach to Deformation-Based Morphometry by Chung, M.K., Worsley, K.J., Paus, T., Cherif, C., Collins, D.L., Giedd, J.N., Rapoport, J.L., Evans, A.C.

“…We present a unified statistical framework for analyzing temporally varying brain morphology using the 3D displacement vector field from a nonlinear…”
Get full text

Spatial smoothing of autocorrelations to control the degrees of freedom in fMRI analysis by Worsley, K.J.

“…In the statistical analysis of fMRI data, the parameter of primary interest is the effect of a contrast; of secondary interest is its standard error, and of…”
Get full text

On the Fisher’s transformation of correlation random fields by Carbonell, F., Worsley, K.J., Trujillo-Barreto, N.J.

Get full text

Estimating the Delay of the fMRI Response by Liao, C.H., Worsley, K.J., Poline, J.-B., Aston, J.A.D., Duncan, G.H., Evans, A.C.

“…We propose a fast, efficient, general, simple, valid, and robust method of estimating and making inference about the delay of the fMRI response modeled as a…”
Get full text

Characterizing the Response of PET and fMRI Data Using Multivariate Linear Models by Worsley, K.J., Poline, J-B., Friston, K.J., Evans, A.C.

“…This paper presents a new method for characterizing brain responses in both PET and fMRI data. The aim is to capture the correlations between the scans of an…”
Get full text

Inference for magnitudes and delays of responses in the FIAC data using BRAINSTAT/FMRISTAT by Taylor, J.E., Worsley, K.J.

“…We used straightforward linear mixed effects models as described in Worsley et al. together with recent advances in smoothing to control the degrees of…”
Get full text

Aerial spraying of 2,4,5-T [trichlorophenoxyacetic acid] and human birth malformations: an epidemiological investigation [New Zealand] by Hanify, J.A, Metcalf, P, Nobbs, C.L, Worsley, K.J

“…An investigation of the rate of birth malformations in the Northland region of New Zealand provides no evidence to associate spraying of…”
Get full text

A Statistical Method for the Analysis of Positron Emission Tomography Neuroreceptor Ligand Data by Aston, J.A.D., Gunn, R.N., Worsley, K.J., Ma, Y., Evans, A.C., Dagher, A.

“…A method for voxel by voxel statistical inference of PET radioligand receptor studies is presented. This method is aimed at detecting differences in…”
Get full text