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Michael Herzog

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Publications associées (436)

Contour-integration deficits in intact visual field of hemianopia patients

Michael Herzog, Ophélie Gladys Favrod

We investigated Gestalt perception in the intact visual field (VF) of hemianopia patients. Three patients and matched controls performed a Yes-No figure detection task. Gabor patches of one orientation, making up the outline of a square, were embedded in r ...

Sage Publications Ltd2015

Human and Machine Learning in Non-Markovian Decision Making

Walter Senn, Michael Herzog, Elisa Tartaglia, Silvia Marchesotti, Aaron Michael Clarke

Humans can learn under a wide variety of feedback conditions. Reinforcement learning (RL), where a series of rewarded decisions must be made, is a particularly important type of learning. Computational and behavioral studies of RL have focused mainly on Ma ...

Public Library of Science2015

What crowding tells about schizophrenia

Michael Herzog, Maya Roinishvili, Albulena Jashari-Shaqiri

Visual paradigms are versatile tools to investigate the pathophysiology of schizophrenia. Contextual modulation refers to a class of paradigms where a target is flanked by neighboring elements, which either deteriorate or facilitate target perception. It i ...

Sage Publications Ltd2015

Does chronic nicotine consumption influence visual backward masking in schizophrenia and schizotypy?

Michael Herzog, Maya Roinishvili, Guillaume Sierro, Christine Mohr, Albulena Jashari-Shaqiri

Nicotine consumption is higher for people within the schizophrenia spectrum compared to controls. This observation supports the self-medication hypothesis, that nicotine relives symptoms in, for example, schizophrenia patients. We tested whether performanc ...

2015

EEG and fMRI correlates of non-retinotopic motion processing in the human visual system

Michael Herzog, Yvonne Evelina Thunell, Wietske Van der Zwaag, Gijs Plomp

Association for Research in Vision and Ophthalmology2015

Different colors of light lead to different adaptation and activation as determined by high-density EEG

Jean-Louis Scartezzini, Michael Herzog, Yvonne Evelina Thunell, Gijs Plomp, Mirjam Münch

Light adaptation is crucial for coping with the varying levels of ambient light. Using high-density electroencephalography (EEG), we investigated how adaptation to light of different colors affects brain responsiveness. In a within-subject design, sixteen ...

Elsevier2014

Perceptual Learning With Only One Stimulus

Michael Herzog, Fred Mast, Elisa Tartaglia, Lukasz Grzeczkowski

Perceptual learning is learning to see. For example in a bisection task, three parallel lines are presented with the central line slightly offset towards the right or the left outer line. Participants indicate the offset direction. Training gradually impro ...

2014

Is there a common factor for vision?

Michael Herzog, Aaron Michael Clarke, Christine Mohr

In cognition, common factors play a crucial role. For example, different types of intelligence are highly correlated, pointing to a common factor, which is often called g. One might expect that a similar common factor would also exist for vision. Surprisin ...

Association for Research in Vision and Ophthalmology2014

Contextual Interpretation and Contextual Modulation across the entire visual field

Michael Herzog

Perception of an element can be strongly modulated by surround. Likewise, neural firing of a neuron can strongly be influenced by stimuli outside the classical receptive field. Contextual modulation is often seen as a limitation of the visual system, where ...

2014

Tracing path-guided apparent motion in human primary visual cortex V1

Michael Herzog, Michel Akselrod

Vision is a constructive process. For example, a square, flashed at two distinct locations one after the other, appears to move smoothly between the two locations rather than as two separate flashes (apparent motion). Apparent motion is usually perceived a ...

Nature Publishing Group2014

A Randomized Controlled Trial of the Effectiveness of Computer-Assisted Cognitive Remediation (CACR) in Adolescents with Psychosis or at High Risk of Psychosis

Michael Herzog

Background: Computer assisted cognitive remediation (CACR) was demonstrated to be efficient in improving cognitive deficits in adults with psychosis. However, scarce studies explored the outcome of CACR in adolescents with psychosis or at high risk. Aims: ...

Cambridge University Press2014

EEG frequency tagging dissociates target and flanker processing in crowding

Michael Herzog, Vitaly Chicherov

Flankers can strongly deteriorate performance on a target (crowding). The neural mechanisms of crowding are largely unknown. We have recently shown that the N1 component of the EEG is suppressed during crowding. Because it is difficult to disentangle the n ...

ASSOCIATION FOR RESEARCH IN VISION & OPHTHALMOLOGY2014

Why vision is not both hierarchical and feedforward

Michael Herzog, Aaron Michael Clarke

In classical models of object recognition, first, basic features (e.g., edges and lines) are analyzed by independent filters that mimic the receptive field profiles of V1 neurons. In a feedforward fashion, the outputs of these filters are fed to filters at ...

Frontiers Research Foundation2014

Neural correlates of non-retinotopic processing in human visual cortex as determined by 7T fMRI and high-density EEG

Michael Herzog, Yvonne Evelina Thunell, Wietske Van der Zwaag, Gijs Plomp

Human perception is largely non-retinotopic. A bike passes by; we perceive the reflectors on its wheels rotating on a circular orbit. However, the “real” motion is truly different, namely cycloidal. The real, retinotopic motion is invisible because the bik ...

2014

The time of perception and the perception of time are not identical

Michael Herzog

Often it is assumed that the time of perception is identical or tightly linked to the perception of time. For example, we can clearly perceive a 20 ms delay of two squares presented one after the other at nearby locations (leading to the percept of apparen ...

2014

Deleterious effects of roving on learned tasks

Michael Herzog, Fred Mast, Aaron Michael Clarke, Lukasz Grzeczkowski

In typical perceptual learning experiments, one stimulus type (e.g., a bisection stimulus offset either to the left or right) is presented per trial. In roving, two different stimulus types (e.g., a 30' and a 20' wide bisection stimulus) are randomly inter ...

Pergamon-Elsevier Science Ltd2014

Crowding, grouping, timing

Michael Herzog, Mauro Manassi, Vitaly Chicherov, Aaron Michael Clarke

In crowding, target perception is deteriorated by flanking elements. For example, when a vernier is flanked by two lines of the same length, vernier offset discrimination strongly deteriorates. Interestingly, changing the color of the flankers can reduce c ...

2014

A neuropsychological instrument measuring age-related cerebral decline in older drivers: development reliability, and validity of MedDrive

Michael Herzog, Isabel Cardoso, Paul Vaucher, Daniela Herzig

When facing age-related cerebral decline, older adults are unequally affected by cognitive impairment without us knowing why. To explore underlying mechanisms and find possible solutions to maintain life-space mobility, there is a need for a standardized b ...

Frontiers Research Foundation2014

Visual backward masking deficits in schizotypy are observed in late but not early onset nicotine smokers

Michael Herzog, Guillaume Sierro, Christine Mohr, Géraldine Beaud

Visual backward masking (VBM) is a potential endophenotype for schizophrenia. Relative VBM deficits were also observed in high as compared to low scorers in one schizotypal subdimension (cognitive disorganisation, CogDis; Cappe et al., 2012). VBM deficits ...

2014

Invisibility and interpretation

Michael Herzog

Invisibility is often thought to occur because of the low-level limitations of the visual system. For example, it is often assumed that backward masking renders a target invisible because the visual system is simply too slow to resolve the target and the m ...

Frontiers Media2014

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