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Michael Herzog

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Publications associées (436)

Impaired cognitive functioning in first-episode patients

Michael Herzog, Maya Roinishvili

The first psychotic episode is an important period for prevention of cognitive and social deterioration in schizophrenia. Cognitive deficits are of particular interest since they are evident even before a proper diagnosis can be made. Interestingly, there ...

Sage Publications Ltd2016

Reinforcement learning: the effect of environment

Michael Herzog, He Xu

Reinforcement learning is a type of supervised learning, where reward is sparse and delayed. For example in chess, a series of moves is made until a sparse reward (win, loss) is issued, which makes it impossible to evaluate the value of a single move. Stil ...

2016

How best to unify crowding?

Michael Herzog, Adrien Christophe Doerig, Mattew Pachai

Crowding refers to the detrimental effect of nearby elements on target perception. Recently, Harrison and Bex (Curr Biol, 2015) modeled performance in a novel orientation crowding paradigm where observers reported the orientation of a Landolt C presented a ...

2016

The complexity of schizophrenia: a battery of tests

Michael Herzog

Schizophrenia research has focused on single mechanisms mainly. Classically, a paradigm is chosen, such as a cognitive or perceptual test. The outcome is usually that schizophrenia patients perform worse than controls. Substantial research is then spent to ...

2016

EEG Correlates of Backward Masking in Schizotypy

Michael Herzog, Maya Roinishvili, Ophélie Gladys Favrod, Guillaume Sierro, Christine Mohr

Visual deficits are well documented in schizophrenia, especially in backward masking. In our task a Vernier is followed by a blank inter-stimulus interval (ISI) and then a grating mask. Observers indicate the direction of the Vernier offset (left vs right) ...

2016

Time Slices: What Is the Duration of a Percept?

Michael Herzog, Frank Scharnowski

We experience the world as a seamless stream of percepts. However, intriguing illusions and recent experiments suggest that the world is not continuously translated into conscious perception. Instead, perception seems to operate in a discrete manner, just ...

Public Library of Science2016

Response mode specificity of perceptual learning

Michael Herzog, Fred Mast, Lukasz Grzeczkowski

Association for Research in Vision and Ophthalmology2016

Spatial and temporal aspects of visual backward masking in children and young adolescents

Michael Herzog

The development of visual functions is very diverse. Some visual functions mature within the first year of life, whereas maturation for other functions extends into adolescence. The reasons for these developmental differences are largely unknown. Here, we ...

Springer2016

Visual perceptual learning of a task-irrelevant feature of the stimulus

Michael Herzog, Lukasz Grzeczkowski, Jessica Galliussi

Awareness, focused attention, and task-relevance were thought to be necessary for perceptual learning (PL): a Feature of the Stimulus (FoS) on which participants perform a task is learned, while a task-irrelevant FoS is not learned. This view has been chal ...

Sage Publications Ltd2016

Retinotopic encoding of the Ternus-Pikler display reflected in the early visual areas

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

The visual representation of the world is often assumed to be retinotopic, and many visual brain areas are indeed organized retinotopically. Visual perception, however, is not based on a reference frame anchored in retinotopic coordinates. For example, whe ...

Association for Research in Vision and Ophthalmology (ARVO)2016

Is there a common cause for perceptual decline in the aging brain?

Michael Herzog, Aaron Michael Clarke, Albulena Jashari-Shaqiri

Even in the absence of neurodegenerative disease, aging strongly affects vision. Whereas optical deficits are well documented, much less is known perceptual deficits. In most perceptual studies, one paradigm is tested and it is usually found that older par ...

Sage Publications Ltd2016

A computational model for reference-frame synthesis with applications to motion perception

Michael Herzog, Aaron Michael Clarke

As discovered by the Gestaltists, in particular by Duncker, we often perceive motion to be within a non-retinotopic reference frame. For example, the motion of a reflector on a bicycle appears to be circular, whereas, it traces out a cycloidal path with re ...

Elsevier2016

A novel automatic pre-processing pipeline for EEG analysis based on robust statistics

Michael Herzog, Vitaly Chicherov, Patricia Figueiredo, Janir Nuno Ramos Antunes Da Cruz

The electroencephalogram (EEG) is a non-invasive and low-cost tool for the investigation of human brain function. However, EEG data are typically contaminated with a number of artifacts. With the advent of both high-density EEG arrays and studies of large ...

2016

What crowding can tell us about object representations

Michael Herzog, Mauro Manassi, Aaron Michael Clarke

In crowding, perception of a target usually deteriorates when flanking elements are presented next to the target. Surprisingly, adding further flankers can lead to a release from crowding. In previous work we showed that, for example, vernier offset discri ...

Association for Research in Vision and Ophthalmology (ARVO)2016

Models of crowding: a comparative study

Michael Herzog, Gregory Francis, Adrien Christophe Doerig, Aaron Michael Clarke

In crowding, the perception of an object deteriorates in the presence of nearby elements. Obviously, crowding is a ubiquitous phenomenon, since elements are rarely seen in isolation. Despite this ubiquity, there exists no consensus on how to model crowding ...

2016

Cognitive markers as potential endophenotypes for schizophrenia

Michael Herzog, Maya Roinishvili

Schizophrenia is a heterogeneous disease strongly influenced by genetic predisposition. A large variety of candidate genes has been identified of which each gene, however, explains only a small proportion of the genetic risk. For this reason, stable marker ...

2016

Local versus global and retinotopic versus non-retinotopic motion processing in schizophrenia patients

Michael Herzog, Maya Roinishvili, Marc Michael Lauffs, Albulena Jashari-Shaqiri

Schizophrenia impairs cognitive functions as much as perception. For example, patients perceive global motion in random dot kinematograms less strongly, because, as it is argued, the integration of the dots into a single Gestalt is complex and therefore de ...

Elsevier2016

Higher N1 responses in relatives of schizophrenia patients than controls in visual backward masking

Michael Herzog, Maya Roinishvili, Patricia Figueiredo, Janir Nuno Ramos Antunes Da Cruz

Association for Research in Vision and Ophthalmology2016

Alpha7 subunit of the nicotinergic acethylcholine receptor gene (CHRNA7) and perception of coherent motion in aging

Michael Herzog

Genetic variations of the alpha7 subunit of the nicotinergic acetylcholine receptor gene (CHRNA7) are linked to cognitive deficits in aging and schizophrenia. However, little is known about associations of the CHRNA7 gene with aged-related decline in visua ...

2016

EEG Correlates of Relative Motion Encoding

Michael Herzog, Yvonne Evelina Thunell, Gijs Plomp

A large portion of the visual cortex is organized retinotopically, but perception is usually non-retinotopic. For example, a reflector on the spoke of a bicycle wheel appears to move on a circular or prolate cycloidal orbit as the bicycle moves forward, wh ...

Springer Verlag2016

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