Dr Andrew Welchman

Andrew Welchman

University position

Senior Research Associate

Dr Andrew Welchman is pleased to consider applications from prospective PhD students.

Departments

Department of Psychology

Home page

http://andrewwelchman.info (personal home page)

Research Themes

Cognitive and Behavioural Neuroscience

Systems and Computational Neuroscience

Interests

I am interested in how the brain brings together information from the senses to support perception and interaction with the rapidly changing world. Work in my lab integrates psychophysics, movement recording, modelling and brain imaging techniques (TMS, fMRI). Current projects are examining (i) the neural circuits that support 3D perception from binocular disparity and integrated depth cues; (ii) the mechanisms that support multisensory perception; (iii) perceptual learning and plasticity; (iv) the perception of material properties; (v) movement production and execution; (vi) synchronisation and rhythmicity.

Research Focus

Keywords

Perception

Brain Imaging

Bayesian Modelling

fMRI

TMS

Clinical conditions

No direct clinical relevance

Equipment

Behavioural analysis

Computational modelling

Electroencephalography (EEG)

Magnetic resonance imaging (MRI)

Collaborators

No collaborators listed

Associated News Items


Key publications

Ban H & Welchman AE (2015), “fMRI analysis-by-synthesis reveals a dorsal hierarchy that extracts surface slant” Journal of Neuroscience 35, 9823-35

Goncalves NR, Ban H, Sánchez-Panchuelo RM, Francis ST, Schluppeck D & Welchman AE (2015), “7 tesla fMRI reveals systematic functional organization for binocular disparity in dorsal visual cortex” Journal of Neuroscience 35, 3056-72

Ban H, Preston TJ, Meeson A, Welchman AE (2012), “The integration of motion and disparity cues to depth in dorsal visual cortex.” Nat Neurosci 15(4):636-43 Details

Publications

in press

Sun HC, Di Luca M, Ban H, Muryy A, Fleming RW, Welchman AE (in press), “Differential processing of binocular and monocular gloss cues in human visual cortex.” J Neurophysiol doi: 10.1152/jn.00829.2015

Sun HC, Welchman AE, Chang DH, Di Luca M (in press), “Look but don't touch: Visual cues to surface structure drive somatosensory cortex.” Neuroimage doi: 10.1016/j.neuroimage.2015.12.054

2015

Dekker TM, Ban H, van der Velde B, Sereno MI, Welchman AE & Nardini M (2015), “Late development of cue integration is linked to sensory fusion in cortex” Current Biology 25, 2856-61

Kourtzi Z, Welchman AE (2015), “Adaptive shape coding for perceptual decisions in the human brain.” Journal of Vision 15(7):2

Luft CD, Meeson A, Welchman AE, Kourtzi Z (2015), “Decoding the future from past experience: learning shapes predictions in early visual cortex.” Journal of Neurophysiology doi: 10.1152/jn.00753.2014

Patten ML, Welchman AE (2015), “fMRI Activity in Posterior Parietal Cortex Relates to the Perceptual Use of Binocular Disparity for Both Signal-In-Noise and Feature Difference Tasks.” PLoS One doi: 10.1371/journal.pone.0140696

Pelekanos V, Ban H, Welchman AE (2015), “Brightness masking is modulated by disparity structure.” Vision Research doi: 10.1016/j.visres.2015.02.010

Sun HC, Ban H, Di Luca M, Welchman AE (2015), “fMRI evidence for areas that process surface gloss in the human visual cortex.” Vision Research doi: 10.1016/j.visres.2014.11.012

2014

Chang DH, Mevorach C, Kourtzi Z, Welchman AE. (2014), “Training transfers the limits on perception from parietal to ventral cortex.” Current Biology doi: 10.1016/j.cub.2014.08.058

Elliott MT, Wing AM, Welchman AE (2014), “Moving in time: Bayesian causal inference explains movement coordination to auditory beats.” Proc Biol Sci 281(1786) Details

Murphy AP, Leopold DA, Welchman AE (2014), “Perceptual memory drives learning of retinotopic biases for bistable stimuli.” Front Psychol 5:60 Details

Muryy AA, Fleming RW, Welchman AE (2014), “Key characteristics of specular stereo.” Journal of Vision doi: 10.1167/14.14.14

2013

Chang DH, Kourtzi Z, Welchman AE (2013), “Mechanisms for extracting a signal from noise as revealed through the specificity and generality of task training.” J Neurosci 33(27):10962-71 Details

Dövencioğlu D, Ban H, Schofield AJ, Welchman AE (2013), “Perceptual integration for qualitatively different 3-D cues in the human brain.” J Cogn Neurosci 25(9):1527-41 Details

Dövencioğlu DN, Welchman AE, Schofield AJ (2013), “Perceptual learning of second order cues for layer decomposition.” Vision Res 77:1-9 Details

Murphy AP, Ban H, Welchman AE (2013), “Integration of texture and disparity cues to surface slant in dorsal visual cortex.” J Neurophysiol 110(1):190-203 Details

Muryy AA, Welchman AE, Blake A, Fleming RW (2013), “Specular reflections and the estimation of shape from binocular disparity.” Proc Natl Acad Sci U S A 110(6):2413-8 Details

Welchman AE, Kourtzi Z (2013), “Linking brain imaging signals to visual perception.” Vis Neurosci 30(5-6):229-41 Details

2011

Elliott MT, Wing AM, Welchman AE (2011), “The effect of ageing on multisensory integration for the control of movement timing.” Exp Brain Res 213(2-3):291-8 Details

Lugtigheid AJ, Brenner E, Welchman AE (2011), “Speed judgments of three-dimensional motion incorporate extraretinal information.” J Vis 11(13) Details

Lugtigheid AJ, Welchman AE (2011), “Evaluating methods to measure time-to-contact.” Vision Res 51(20):2234-41 Details

2010

Elliott MT, Wing AM, Welchman AE (2010), “Multisensory cues improve sensorimotor synchronisation.” Eur J Neurosci 31(10):1828-35 Details

Papathomas TV, Kourtzi Z, Welchman AE (2010), “Perspective-based illusory movement in a flat billboard--an explanation.” Perception 39(8):1086-93 Details

Welchman AE, Stanley J, Schomers MR, Miall RC, Bülthoff HH (2010), “The quick and the dead: when reaction beats intention.” Proc Biol Sci 277(1688):1667-74 Details

Wing AM, Doumas M, Welchman AE (2010), “Combining multisensory temporal information for movement synchronisation.” Exp Brain Res 200(3-4):277-82 Details

Zhang J, Meeson A, Welchman AE, Kourtzi Z (2010), “Learning alters the tuning of functional magnetic resonance imaging patterns for visual forms.” J Neurosci 30(42):14127-33 Details

2009

Elliott MT, Welchman AE, Wing AM (2009), “Being discrete helps keep to the beat.” Exp Brain Res 192(4):731-7 Details

Elliott MT, Welchman AE, Wing AM (2009), “MatTAP: A MATLAB toolbox for the control and analysis of movement synchronisation experiments.” J Neurosci Methods 177(1):250-7 Details

Preston TJ, Kourtzi Z, Welchman AE (2009), “Adaptive estimation of three-dimensional structure in the human brain.” J Neurosci 29(6):1688-98 Details

Welchman AE, Harris JM, Brenner E (2009), “Extra-retinal signals support the estimation of 3D motion.” Vision Res 49(7):782-9 Details

2008

Preston TJ, Li S, Kourtzi Z, Welchman AE (2008), “Multivoxel pattern selectivity for perceptually relevant binocular disparities in the human brain.” J Neurosci 28(44):11315-27 Details

Welchman AE, Lam JM, Bülthoff HH (2008), “Bayesian motion estimation accounts for a surprising bias in 3D vision.” Proc Natl Acad Sci U S A 105(33):12087-92 Details

2007

Chandrasekaran C, Canon V, Dahmen JC, Kourtzi Z, Welchman AE (2007), “Neural correlates of disparity-defined shape discrimination in the human brain.” J Neurophysiol 97(2):1553-65 Details

2005

Kourtzi Z, Betts LR, Sarkheil P, Welchman AE (2005), “Distributed neural plasticity for shape learning in the human visual cortex.” PLoS Biol 3(7):e204 Details

Welchman AE, Deubelius A, Conrad V, Bülthoff HH, Kourtzi Z (2005), “3D shape perception from combined depth cues in human visual cortex.” Nat Neurosci 8(6):820-7 Details