Fiser J., Arato J., Khani A. & Rainer G. (2016) Change-related weighting of statistical information in visual decision making. VSS 2016, Journal of Vision 16 (12), 574-574 [Abstract]
There is a complex interaction between short- and long-term statistics of earlier percepts in modulating perceptual decisions, yet this interaction is not well understood. We conducted experiments, in which we independently manipulated the appearance probabilities (APs) of abstract shapes over short and long time ranges, and also tested the effect of dynamically changing these probabilities. […]
Fiser J., Christensen J. & Bex P. (2016) Encoding basic visual attributes of naturalistic complex stimuli. ECVP 2016, Perception 45, 340-340 [Abstract]
Despite numerous studies with simple stimuli, little is known about how low-level feature information of complex images is represented. We examined sensitivity to the orientation and position of Gabor patches constituting stimuli from three classes according to their image type:Familiar natural objects, Unfamiliar fractal patterns, and Simple circular patterns. All images were generated by re-synthesizing […]
Arato J. & Fiser J. (2016) Spatio-temporal probability integration during visual discrimination.ECVP 2016, Perception 45, 178-179 [Abstract]
How specific statistical priors do we maintain? While it is known that past stimulus statistics influences later perceptual decisions, it is unclear how such effects would interact and influence decisions across different spatial locations. To test this, we used a visual discrimination paradigm with two target locations, and two abstract shapes that could appear in […]
Bernacchia A., Fiser J., Hennequin G. & Lengyel M. (2017) Dale’s principle preserves sequentiality in neural circuits. COSYNE 2017, Salt Lake City, UT [Abstract]
Cortical circuits obey Dale’s principle: each neuron either excites or inhibits all its postsynaptic targets. There is no known principled justification for why this must be so; in fact, Dale’s principle is considered – if at all – a mere constraint in neural network models. Here we provide a novel rationale for Dale’s principle: networks […]
Fiser J., Lengyel G. & Nagy M. (2017) Visual statistical learning provides scaffolding for emerging object representations. VSS 2017, Journal of Vision 17 (10), 39-39 [Abstract]
Although an abundance of studies demonstrated human’s abilities for visual statistical learning (VSL), much fewer studies focused on the consequences of VSL. Recent papers reported that attention is biased toward detected statistical regularities, but this observation was restricted to spatial locations and provided no functional interpretation of the phenomenon. We tested the idea that statistical […]
Fiser J., Lengyel G., Lengyel M. & Wolpert D. (2017) Emergence of object representations through generalization between visual and haptic statistics. Conference on Interdisciplinary Advances in Statistical Learning Bilbao, Spain [Abstract]
The emergence of the concept defining a discrete object in the brain is a fundamental yet poorly understood process. In two statistical learning experiments, we show that humans can form these abstract concepts via purely visual statistics or physical interactions, which nevertheless will generalize across these two modalities. Participants saw a sequence of visual scenes […]
Fiser J. (2018) Sampling: a probabilistic approach to cortical computation, learning, and development. The Probabilistic Brain, Durham UK [Abstract]
I will present a framework and a combined empirical-computational program that explores what computation and cortical neural representation could underlie our intelligent behaviour. I will start by giving a brief summary of the fundamental logic of the framework and the main results we obtained earlier in support of the framework. Next, I will focus on […]
Arato J., Koblinger A. & Fiser J. (2018) Uncertainty-based adjustment of internal model during perceptual sequential decision-making. SFN 2018 [Abstract]
Repeated perceptual decision-making is typically investigated under the tacit assumption that each decision is an independent process or, at most, it is influenced by a few decisions made prior to it. We investigated human sequential 2-AFC decision-making under the condition, when more than one aspect of the context could vary during the experiment: both the […]
Koblinger A., Arato J. & Fiser J. (2018) Complex adaptive internal model subserves perceptual sequential decision making. COSYNE 2018, Salt Lake City, UT [Abstract]
Despite recent findings of sequential effects in perceptual serial decision making (SDM) (Chopin & Mamassian 2012; Fischer & Whitney 2014), SDM is typically investigated under the assumption that the decisions in the sequence are independent or at most, are influenced by a few previous trials. We set out to identify the true underlying internal model […]
Reguly H., Nagy M. & Fiser J. (2018) Complex interactions across modalities in audio-visual cross-modal statistical learning. VSS 2018, Journal of Vision 18 (10), 1132-1132 [Abstract]
Statistical learning (SL) within modalities is an area of intensive research, but much less attention has been focused on how SL works across different modalities apart from demonstrating that learning can benefit from information provided in more than one modalities. We investigated visuo-auditory SL using the standard arrangement of SL paradigms. Four visual and four […]