Stanciu, O . & Fiser , J. (2022) Do humans recalibrate the confidence of advisers or take their confidence at face value? Proceedings of the Annual Meeting of the Cognitive Science Society 44 (44) [Abstract]
Who we choose to learn from is influenced by the relative confidence of potential informants. More confident advisers are preferred based on an assumption that confidence is a good indicator of accuracy. However, oftentimes, accuracy and confidence are not calibrated, either due to strategic manipulations of confidence or unintentional failures of metacognition. When accuracy information […]
Lengyel G., Lengyel M., & Fiser J. (2022) Contextual learning and inference in perceptual learning Journal of Vision 22 (14), 3999-3999 [Abstract]
Recent studies established that perceptual learning (PL) is influenced by strong top-down effects and shows flexible generalization depending on context. However, current computational models of PL utilize feedforward architectures and fail to capture parsimoniously these context-dependent and generalization effects in more complex PL tasks. We propose a Bayesian framework that combines sensory bottom-up and experience-based […]
Magas D., Koblinger Á., Lengyel M. & Fiser J. (2022) Reducible and irreducible uncertainty in low-level visual representations. VSS 2022 [Abstract]
Humans use their subjective uncertainty in their internal representations to make optimal decisions. However, perceptual uncertainty can have two components which have not been systematically distinguished or separately measured. Reducible uncertainty stemming from the noisiness of the system that can be modulated by external and internal factors such as contrast level or attention and that […]
Garber, D., & Fiser , J. (2022) The effect of emerging structural representation on spatial visual statistical learning Journal of Vision 22 (14), 3514-3514 [Abstract]
Studies of spatial visual statistical learning (SVSL) typically focus on the implicit acquisition of co-occurrence-based element chunks oversimplifying the complex process of structure-based visual learning. We investigated the rules of SVSL under complex visual stimulus and task structures. In Phase 1 of the experiment (N=227), observers were exposed to scenes composed of either only horizontally […]
Fiser J. & Biederman I. (1995) Size invariance in visual object priming of gray-scale images. Perception 24 (7), 741-748
The strength of visual priming of briefly presented gray scale pictures of real world objects, measured by naming reaction times and errors, was independent of whether the primed picture of the object was presented in the same or different size than the original picture. These findings replicate Biederman & Cooper’s (1992) results on size invariance […]
Fiser J., Biederman I. & Cooper EE. (1996) To what extent can matching algorithms based on direct outputs of spatial filters account for human object recognition? Spatial Vision 10 (3), 237-271
A number of recent successful models of face recognition posit only two layers, an input layer consisting of a lattice of spatial filters and a single subsequent stage by which those descriptor values are mapped directly onto an object representation layer by standard matching methods such as stochastic optimization. Is this approach sufficient for modeling […]
Dobbins AC., Jeo RM., Fiser J. & Allman JM. (1998) Distance modulation of neural activity in the visual cortex. Science 281 (5376), 552-555
Humans use distance information to scale the size of objects. Earlier studies demonstrated changes in neural response as a function of gaze direction and gaze distance in the dorsal visual cortical pathway to parietal cortex. These findings have been interpreted as evidence of the parietal pathway’s role in spatial representation. Here, distance-dependent changes in neural […]
Biederman I., Subramaniam S., Bar M., Kalocsai P. & Fiser J. (1999) Subordinate-level object classification reexamined. Psychological Research 62 (2-3), 131-153
The classication of a table as round rather than square, a car as a Mazda rather than a Ford, a drill bit as 3/8-inch rather than 1/4-inch, and a face as Tom have all been regarded as a single process termed “subordinate classification”. Despite the common label, the considerable heterogeneity of the perceptual processing required […]
Mel BW. & Fiser J. (2000) Minimizing binding errors using learned conjunctive features. Neural Computation 12 (4), 731-762
We have studied some of the design trade-offs governing visual representations based on spatially invariant conjunctive feature detectors, with an emphasis on the susceptibility of such systems to false-positive recognition errors — Malsburg’s classical binding problem. We begin by deriving an analytical model that makes explicit how recognition performance is affected by the number of […]
Atkins JE., Fiser J. & Jacobs RA. (2001) Experience-dependent visual cue integration based on consistencies between visual and haptic percepts. Vision research 41 (4), 449-461
We study the hypothesis that observers can use haptic percepts as a standard against which the relative reliabilities of visual cues can be judged, and that these reliabilities determine how observers combine depth information provided by these cues. Using a novel visuo-haptic virtual reality environment, subjects viewed and grasped virtual objects. In Experiment 1, subjects […]