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Michael Herzog

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Publications associées (436)

Human perceptual learning by mental imagery

Michael Herzog, Fred Mast, Elisa Tartaglia, Laura Bamert

Perceptual learning is learning to perceive. For example, a radiologist is able to easily identify anomalies in medical images only after extended training. Theoretical and psychophysical studies [1-12] suggest that such improvements of performance are acc ...

Elsevier2009

Combining simultaneous with temporal masking

Michael Herzog, Gregory Francis

Simultaneous and temporal masking are two frequently used techniques in psychology and vision science. Although there are many studies and theories related to each masking technique, there are no systematic investigations of their mutual relationship, even ...

American Psychological Association2009

Modeling perceptual learning: why mice do not play backgammon

Michael Herzog, Elisa Tartaglia, Carl Kristoffer Aberg

Perceptual learning is often considered one of the simplest and basic forms of learning in general. Accordingly, it is usually modeled with simple and basic neural networks which show good results in grasping the empirical data. Simple meets simple. Comple ...

2009

Feature integration across space, orientation, and time in human vision

Michael Herzog, Thomas Otto

2008

Perceptual learning by mental imagery

Michael Herzog, Fred Mast, Elisa Tartaglia, Laura Bamert

In perceptual learning, performance improves when stimuli are presented over and over again. In a bisection task, for example, two vertical outer lines delineate an interval which is bisected by a centre line. Observers indicate whether this centre line is ...

2008

Modeling both spatial and temporal aspects of visual microgenesis

Michael Herzog, Gregory Francis

2008

Assessing the microstructure of motion correspondences with non-retinotopic feature attribution

Michael Herzog, Thomas Otto

The motion correspondence problem, one of the classical examples of perceptual organization, addresses the question of how elements are grouped across space and time. Here, we investigate motion correspondences using a new feature attribution technique. We ...

Association for Research in Vision and Ophthalmology2008

Configural modulation of crowding

Michael Herzog, Toni Saarela, Bilge Sayim

The ability to make judgments about a peripheral target stimulus can be impaired when the target is surrounded by flanking stimuli. This effect is called crowding. Crowding is often related to relatively simple low-level mechanisms that pool visual informa ...

Association for Research in Vision and Ophthalmology2008

Integration of contrast across non-retinotopic locations

Michael Herzog, Thomas Otto, Marco Boi

2008

Contrast polarity, chromaticity, and stereoscopic depth modulate contextual interactions in vernier acuity

Michael Herzog, Bilge Sayim

Vernier alignment thresholds are strongly compromised when the vernier is embedded in an array of equal-length flanking lines. Here, we show that these contextual interactions can be diminished by giving the flanks the opposite contrast polarity, e.g., whi ...

Association for Research in Vision and Ophthalmology2008

Contextual suppression and protection in schizophrenic patients

Michael Herzog, Maya Roinishvili

INTRODUCTION: Contextual processing is often strongly deteriorated in schizophrenic patients as found, for example, in higher cognitive as well as lower visual paradigms. In visual detection tasks, impoverished contextual facilitation was attributed to abe ...

Springer Verlag2008

The influence of perceptual grouping on visual contextual modulation

Michael Herzog, Bilge Sayim

2008

Perceptual learning of bisection stimuli under roving: slow and largely specific

Michael Herzog, Thomas Otto

In perceptual learning, performance often improves within a short time if only one stimulus variant is presented, such as a line bisection stimulus with one outer-line-distance. However, performance stagnates if two bisection stimuli with two outer-line-di ...

Association for Research in Vision and Ophthalmology2008

Motion, not masking, provides the medium for feature attribution

Michael Herzog

Understanding the dynamics of how separate features combine to form holistic object representations is a central problem in visual cognition. Feature attribution (also known as feature transposition and feature inheritance) refers to the later of two stimu ...

Wiley-Blackwell2008

Visual contextual modulation by figural grouping

Michael Herzog, Bilge Sayim

2008

How TMS and stimulus off/on signals modulate feature integration

Michael Herzog, Frank Scharnowski, Johannes Rüter

When a right offset vernier is immediately followed by a left offset vernier (or vice versa), only one vernier is perceived. Feature fusion has occurred. In feature fusion, observers cannot resolve the two verniers individually. Subjects perform at chance ...

Association for Research in Vision and Ophthalmology2008

Grouping explains contextual modulation in low level vision

Michael Herzog, Bilge Sayim

Performance on a target can be modified by contextual elements. For example, when a Vernier is flanked by two lines, offset discrimination deteriorates compared to an unflanked presentation. This contextual modulation is usually explained by local spatial ...

2008

Non-retinotopic motion induced by a Ternus-Pikler display

Michael Herzog, Thomas Otto, Marco Boi

Motion processing is usually deemed to rely on retinotopic coordinates. Using a Ternus-Pikler display, we present an instance in which coherent motion of a dot can only be perceived when its position is integrated non-retinotopically. The stimulus consists ...

2008

When does roving disrupt perceptual learning?

Michael Herzog, Elisa Tartaglia, Carl Kristoffer Aberg

Training with one type of a visual stimulus usually improves performance. When observers train with two or more stimulus types presented in random order (so-called roving), performance improves for certain stimulus types but not for others. To understand w ...

2008

Roving in perceptual learning: stimulus interference and overlapping neural populations

Michael Herzog, Elisa Tartaglia, Carl Kristoffer Aberg

Performance usually improves when observers train with one type of a visual stimulus. Roving denotes the situation when, instead of one, two or more types of stimuli are presented randomly interleaved (one per trial). For some stimulus types, performance i ...

Association for Research in Vision and Ophthalmology2008

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