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Lukasz Grzeczkowski

Cette personne a quitté l’EPFL

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Publications associées (32)

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Visual-induced expectations modulate auditory cortical responses

Lukasz Grzeczkowski

Active sensing has important consequences on multisensory processing (Schroeder et al.,2010). Here, we asked whether in the absence of saccades, the position of the eyes and the timing of transient color changes of visual stimuli could selectively affect t ...

Frontiers Research Foundation2015

Perceptual Learning With Only One Stimulus

Michael Herzog, 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

Perception of visual illusions is intact in schizophrenia

Michael Herzog, Maya Roinishvili, Lukasz Grzeczkowski, Albulena Jashari-Shaqiri

There seems to be no common factor for visual perception because performance levels in many visual tasks correlate only weakly with each other. Similar results were found with visual illusions. However, one may expect common visual factors for individuals ...

2018

No correlations between the strength of visual illusions

Michael Herzog, Aaron Michael Clarke, Lukasz Grzeczkowski

In cognition, audition, and somatosensation, performance correlates strongly between different paradigms suggesting the existence of common factors. Surprisingly, this does not hold true for vision. For example, performance in line bisection and visual acu ...

Sage Publications Ltd2015

Individual differences in the Müller-Lyer and Ponzo illusions are stable across different contexts

Michael Herzog, Lukasz Grzeczkowski, Aline Françoise Cretenoud

Vision scientists have attempted to classify visual illusions according to certain aspects, such as brightness or spatial features. For example, Piaget proposed that visual illusion magnitudes either decrease or increase with age. Subsequently, it was sugg ...

Association for Research in Vision and Ophthalmology2020

The individual structure of visual space

Michael Herzog, Gregory Francis, Lukasz Grzeczkowski, Albulena Jashari-Shaqiri, Aline Françoise Cretenoud

Common factors are ubiquitous. First, we show that, however in vision, correlations of performance in similar paradigms are low even though test-retest reliability is high. Second, one might expect that correlations increase with increasing age because of ...

2018

No correlations between visual illusion strength

Michael Herzog, Aaron Michael Clarke, Lukasz Grzeczkowski

In cognition, audition and somatosensation, performance correlates strongly between different tasks suggesting the existence of common factors. Surprisingly, this does not hold true for vision. For example, Vernier acuity and Gabor detection correlate very ...

2015

Tell me about your Ponzo and I will tell you who you are

Michael Herzog, Aaron Michael Clarke, Lukasz Grzeczkowski

Unlike in cognition, audition and somatosensation, performance between various visual tasks does not correlate. Surprisingly, even tasks that appear similar, like visual acuity and line bisection task do not share much common variance. Similar results were ...

2016

About individual differences in vision

Michael Herzog, Gregory Francis, Aaron Michael Clarke, Lukasz Grzeczkowski

In cognition, audition, and somatosensation, performance strongly correlates between different paradigms, which suggests the existence of common factors. In contrast, visual performance in seemingly very similar tasks, such as visual and bisection acuity, ...

Elsevier2017

About specific and general factors for visual illusions

Michael Herzog, Gregory Francis, Lukasz Grzeczkowski, Aline Françoise Cretenoud

Contrary to studies of audition and cognition, we previously did not find evidence for a general common factor for vision but for many very specific ones. For example, we found strong correlations between 19 versions of the Ebbinghaus illusion, which diffe ...

2018

Linking perceptual learning with identical stimuli to imagery perceptual learning

Michael Herzog, Lukasz Grzeczkowski

Perceptual learning is usually thought to be exclusively driven by the stimuli presented during training (and the underlying synaptic learning rules). In some way, we are slaves of our visual experiences. However, learning can occur even when no stimuli ar ...

Association for Research in Vision and Ophthalmology (ARVO)2015

Individual differences in the perception of visual illusions are stable across eyes, time, and measurement methods

Michael Herzog, Lukasz Grzeczkowski, Aline Françoise Cretenoud

Vision scientists have tried to classify illusions for more than a century. For example, some studies suggested that there is a unique common factor for all visual illusions. Other studies proposed that there are several subclasses of illusions, such as il ...

Association for Research in Vision and Ophthalmology2021

Is the perception of illusions abnormal in schizophrenia?

Michael Herzog, Maya Roinishvili, Lukasz Grzeczkowski, Albulena Jashari-Shaqiri

There seems to be no common factor for visual perception, i.e., performance in visual tasks correlates only weakly with each other. Similar results were found with visual illusions. One may expect common visual factors for individuals suffering from pathol ...

2018

Factors underlying visual illusions are illusion-specific but not feature-specific

Michael Herzog, Gregory Francis, Lukasz Grzeczkowski, Aline Françoise Cretenoud

Common factors are ubiquitous. For example, there is a common factor, g, for intelligence. In vision, there is much weaker evidence for such common factors. For example, visual illusion magnitudes correlate only weakly with each other. Here, we investigate ...

Association for Research in Vision and Ophthalmology (ARVO)2019

Motor response specificity in perceptual learning and its release by double training

Michael Herzog, Lukasz Grzeczkowski, Aline Françoise Cretenoud

Perceptual learning is usually feature-specific. Recently, we showed that perceptual learning is even specific for the motor response type. In a three-line bisection task, participants indicated whether the central line was offset either to the left or rig ...

Association for Research in Vision and Ophthalmology (ARVO)2019

Perceptual learning is specific beyond vision and decision making

Michael Herzog, Lukasz Grzeczkowski, Aline Françoise Cretenoud

Perceptual learning is usually assumed to occur within sensory areas or when sensory evidence is mapped onto decisions. Subsequent procedural and motor processes, involved in most perceptual learning experiments, are thought to play no role in the learning ...

Association for Research in Vision and Ophthalmology (ARVO)2017

Is lack of attention necessary for task-irrelevant perceptual learning?

Michael Herzog, Lukasz Grzeczkowski

Perceptual learning can occur for a feature irrelevant to the training task, when it is sub-threshold and outside of the focus of attention (task-irrelevant perceptual learning, TIPL); however, TIPL does not occur when the task-irrelevant feature is supra- ...

PERGAMON-ELSEVIER SCIENCE LTD2018

How many factors are there in vision?

Michael Herzog, Gregory Francis, Lukasz Grzeczkowski, Aline Françoise Cretenoud

Common factors are ubiquitous in cognition, audition, and somato-sensation. Surprisingly, there seems to be no common factor in vision, i.e., visual tasks correlate very weakly with each other. Here, we show that there are likely many very specific factors ...

2017

Sex-related differences in vision are heterogeneous

Michael Herzog, Maya Roinishvili, Christine Mohr, Lukasz Grzeczkowski, Albulena Jashari-Shaqiri

Nature Research2018

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

Michael Herzog, Lukasz Grzeczkowski

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