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Ivan Alvarez

Researcher at University of Oxford

Publications -  27
Citations -  576

Ivan Alvarez is an academic researcher from University of Oxford. The author has contributed to research in topics: Visual cortex & Population. The author has an hindex of 10, co-authored 26 publications receiving 501 citations. Previous affiliations of Ivan Alvarez include Helen Wills Neuroscience Institute & John Radcliffe Hospital.

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Comparing different stimulus configurations for population receptive field mapping in human fMRI

TL;DR: It is found that the presence or absence of eccentricity scaling had a significant effect on goodness of fit and pRF size estimates, and both eccentricity scaled and polar rather than Cartesian stimulus configuration are important considerations for optimal experimental design in pRF mapping.
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Perception and processing of faces in the human brain is tuned to typical feature locations

TL;DR: It is shown that the visual system represents face features better when they are shown at retinal positions where they typically fall during natural vision, which suggests that brain representations of face features do not cover the visual field uniformly.
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On the Role of Suppression in Spatial Attention: Evidence from Negative BOLD in Human Subcortical and Cortical Structures

TL;DR: This paper found evidence for a spatially selective suppressive mechanism that acts at a subcortical level, which is consistent with the results of this paper. But, the extent to which enhancement and suppression is observed, their stimulus dependence, and the stages of the visual system at which they are expressed remains poorly understood.