A5076942679- Neural and Behavioral Psychology Studies
- Visual perception and processing mechanisms
- Neural dynamics and brain function
- EEG and Brain-Computer Interfaces
- Memory and Neural Mechanisms
- Face Recognition and Perception
- Neural Networks and Applications
- Human-Automation Interaction and Safety
- Advanced Memory and Neural Computing
- Motor Control and Adaptation
- Visual and Cognitive Learning Processes
- Action Observation and Synchronization
- Gaze Tracking and Assistive Technology
- Child and Animal Learning Development
- Olfactory and Sensory Function Studies
- Ocular and Laser Science Research
- Sport Psychology and Performance
- Spatial Cognition and Navigation
- Data Visualization and Analytics
- Forecasting Techniques and Applications
- Aesthetic Perception and Analysis
- Neurobiology and Insect Physiology Research
- Tactile and Sensory Interactions
- Cell Image Analysis Techniques
- Functional Brain Connectivity Studies
Ernst Strüngmann Institute for Neuroscience
2019-2025
University of California, San Diego
2016-2022
Radboud University Nijmegen
2018-2021
Google (United States)
2019
Maastricht University
2011-2018
Vanderbilt University
2010-2018
University of California System
2016
Can people evaluate phenomenal qualities of internally generated experiences, such as whether a mental image is vivid or detailed? This question exemplifies problem metacognition: How well do know their own thoughts? In the study reported here, participants were instructed to imagine specific visual pattern and rate its vividness, after which they presented with an ambiguous rivalry display that consisted previously imagined plus orthogonal pattern. On individual trials, higher ratings...
If we view a visual scene that contains many objects, then momentarily close our eyes, some details persist while others seem to fade. Discrete models of working memory (VWM) assume only few items can be actively maintained in memory, beyond which pure guessing will emerge. Alternatively, continuous resource all stored with precision. Distinguishing between these competing is challenging, however, as allow for stochastically variable precision (across and trials) produce error distributions...
Visual short-term memory serves as an efficient buffer for maintaining no longer directly accessible information. How robust are visual memories against interference? Memory simple features has proven vulnerable to distractors containing conflicting information along the relevant stimulus dimension, leading idea that interacting feature-specific channels at early stage of processing support features. Here we showed a single randomly orientated grating was susceptible interference from...
Abstract Working memory serves as an essential workspace for the mind, allowing active maintenance of information to support short-term cognitive goals. Although people can readily report contents working memory, it is unknown whether they might have reliable metacognitive knowledge regarding accuracy their own memories. We investigated this question better understand core properties visual system. Observers were briefly presented with displays three or six oriented gratings, after which...
Visual working memory (VWM) relies on a distributed cortical network. Yet, the extent to which individual areas, like early visual cortex and intraparietal sulcus, are essential VWM storage remains debated. Here, we reanalyze key datasets from two independent labs address three topics at forefront of current-day research: Resiliency mnemonic representations against distraction, role attentional priority in memory, brain–behavior relationships. By utilizing different analysis approaches, each...
When holding multiple items in visual working memory, representations of individual are often attracted to, or repelled from, each other. While this is empirically well-established, existing frameworks do not account for both types distortions, which appear to be opposition. Here, we demonstrate that memory distortion may confer functional benefits under different circumstances. there many remember and subjects near their capacity accurately item individually, memories become more similar...
Working memory provides flexible storage of information in service upcoming behavioral goals. Some models propose specific fixed loci and mechanisms for the visual working memory, such as sustained spiking parietal prefrontal cortex during maintenance. An alternative view is that can be remembered a format best suits current For example, might stored sensory areas easier comparison to future inputs, or re-coded into more abstract action-oriented motor areas. Here, we tested this hypothesis...
Visual imagery has been closely linked to brain mechanisms involved in perception. Can visual imagery, like perception, improve by means of training? Previous research demonstrated that people can reliably evaluate the vividness single episodes sensory imagination – might metacognition also over course We had participants imagine colored Gabor patterns for an hour a day, five consecutive days, and again two weeks after training. Participants rated subjective effort their mental on each...
Previous studies have suggested that people can maintain prioritized items in visual working memory for many seconds, with negligible loss of information over time. Such findings imply representations are robust to the potential contaminating effects internal noise. However, once is encoded into memory, one might expect it inevitably begin degrading time, as this actively maintained no longer tethered original perceptual input. Here, we examined issue by evaluating single central...
In a recent issue of Nature Communications, Harrison, Bays, and Rideaux 1 use electroencephalography (EEG) to infer population tuning properties from human visual cortex, deliver major update existing knowledge about the most elemental building block perception – orientation tuning. Using EEG together with simulations in an approach they refer as “generative forward modeling”, authors adjudicate between two competing schemes for cortex. They claim that redistribution curves can explain their...
Neuroimaging studies have demonstrated that activity patterns in early visual areas predict stimulus properties actively maintained working memory. Yet, the mechanisms by which such information is represented remain largely unknown. In this study, observers remembered orientations of 4 briefly presented gratings, one each quadrant field. A 10Hz Transcranial Magnetic Stimulation (TMS) triplet was applied directly at offset, or midway through a 2-second delay, targeting cortex corresponding...
The ability to stably maintain visual information over brief delays is central healthy cognitive functioning, as the differentiate such internal representations from external inputs. One possible way achieve both via multiple concurrent mnemonic along hierarchy that differ systematically of perceptual To test this possibility, we examine orientation during perception and working memory. Human participants directly viewed, or held in mind, oriented grating patterns, similarity between fMRI...
The ability to stably maintain visual information over brief delays is central healthy cognitive functioning, as the differentiate such internal representations from external inputs. One possible way achieve both via multiple concurrent mnemonic along hierarchy that differ systematically of perceptual To test this possibility, we examine orientation during perception and working memory. Human participants directly viewed, or held in mind, oriented grating patterns, similarity between fMRI...
The brain׳s representation of the body can be extended to include objects that are not originally part body. Various studies have found both extremely rapid extensions occur as soon an object is held, well slow require weeks training. Due species and methodological differences, it unclear whether were probing different representations, or revealing multiple aspects same representation. Here, we present evidence (cotton balls) held by a tool (chopsticks) rapidly integrated into...
When holding multiple items in visual working memory, representations of individual are often attracted to, or repelled from, each other. While empirically well-established, existing frameworks do not account for both types distortions, which appear to be opposition. Here, we demonstrate that memory distortion may confer functional benefits under different circumstances. there many remember and subjects near their capacity accurately item individually, memories become more similar...
Visual working memory is the mechanism supporting continued maintenance of information after sensory inputs are removed. Although capacity visual limited, memoranda that spaced farther apart on a 2-D display easier to remember, potentially because neural representations more distinct within retinotopically organized areas cortex during encoding, maintenance, or retrieval. The impact spatial separability in depth less clear, even though essential guiding interactions with objects environment....
The ability to stably maintain visual information over brief delays is central healthy cognitive functioning, as the differentiate such internal representations from external inputs. One possible way achieve both via multiple concurrent mnemonic along hierarchy that differ systematically of perceptual To test this possibility, we examine orientation during perception and working memory. Human participants directly viewed, or held in mind, oriented grating patterns, similarity between fMRI...
Traversing sensory environments requires keeping relevant information in mind while simultaneously processing new inputs. Visual is kept working memory via feature selective responses early visual cortex, but recent work had suggested that inputs wipe out this information. Here we show region-wide multiplexing abilities classic areas, with population-level response patterns cortex representing the contents of concurrently
Visual working memory refers to the ability temporarily hold information in mind service of behavior. Often, it is not sufficient an abstract idea achieve our goals. Rather, we must maintain vivid sensory details. For example, when buying a spool thread repair much-loved shirt, holding category buy correct color (e.g. ‘blue’)—instead, you need precise visual (e.g., particular gray-ish shade blue). One proposal for how vivid, detailed recruitment hypothesis. Sensory proposes that neural...
In this short perspective, we reflect upon our tendency to use oversimplified and idiosyncratic tasks in a quest discover general mechanisms of working memory. We discuss how the work Mark Stokes collaborators has looked beyond localized, temporally persistent neural activity shifted focus toward importance distributed, dynamic codes for A critical lesson from is that using simplified does not automatically simplify computations supporting behavior (even if wish it were so). Moreover,...