Results 1 - 10 of 164

Symbolic Representation of Neural Networks

by Rudy Setiono, Huan Liu - IEEE Computer , 1996
"... Although backpropagation neural networks generally predict better than decision trees do for pattern classification problems, they are often regarded as black boxes, i.e., their predictions cannot be explained as those of decision trees. In many applications, more often than not, explicit knowled ..."
Abstract - Cited by 55 (10 self) - Add to MetaCart
knowledge is needed by human experts. This work derives symbolic representations from a neural network to make epxlicit each prediction of the network. An algorithm is proposed and implemented to extract symbolic rules from neural networks.

Buildup of choicepredictive activity in human motor cortex during perceptual decision making

by Tobias H. Donner, Markus Siegel, Pascal Fries, Andreas K. Engel - Curr. Biol , 2009
"... Simple perceptual decisions are ideally suited for studying the sensorimotor transformations underlying flexible behavior [1, 2]. During perceptual detection, a noisy sensory signal is converted into a behavioral report of the presence or absence of a perceptual experience [3]. Here, we used magneto ..."
Abstract - Cited by 19 (3 self) - Add to MetaCart
Simple perceptual decisions are ideally suited for studying the sensorimotor transformations underlying flexible behavior [1, 2]. During perceptual detection, a noisy sensory signal is converted into a behavioral report of the presence or absence of a perceptual experience [3]. Here, we used

The Well-Worn Route and the Path Less Traveled: Distinct Neural Bases of Route Following and Wayfinding in Humans

by Tom Hartley, Eleanor Maguire, Tm Eleanor, A. Maguire, Hugo J Spiers, Neil Burgess , 2003
"... Introduction Navigation in a large-scale environment involves making decisions about which way to go based on one's current goals, internal representations, and perceptual cues. However, this behavior can be expressed in several different ways. We can choose a novel path when, for example, we ..."
Abstract - Cited by 144 (9 self) - Add to MetaCart
Introduction Navigation in a large-scale environment involves making decisions about which way to go based on one's current goals, internal representations, and perceptual cues. However, this behavior can be expressed in several different ways. We can choose a novel path when, for example, we

Behavioral/Cognitive How Embodied Is Perceptual Decision Making? Evidence for Separate Processing of Perceptual and Motor Decisions

by Flavia Filimon, Marios G. Philiastides, Jonathan D. Nelson, Niels A. Kloosterman, Hauke R. Heekeren
"... The extent to which different cognitive processes are “embodied ” is widely debated. Previous studies have implicated sensorimotor regions such as lateral intraparietal (LIP) area in perceptual decision making. This has led to the view that perceptual decisions are embodied in the same sensorimotor ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
networks that guide body movements. We use event-related fMRI and effective connectivity analysis to investigate whether the human sensorimotor system implements perceptual decisions. We show that when eye and hand motor preparation is disentangled from perceptual decisions, sensorimotor areas

Neural correlates of first-person-perspective.

by K Vogeley , M May , A Ritzl , P Falkai , K Zilles , G R Fink - Trends in Cognitive Science, , 2003
"... Abstract & Taking the first-person perspective (1PP) centered upon one's own body as opposed to the third-person perspective (3PP), which enables us to take the viewpoint of someone else, is constitutive for human self-consciousness. At the underlying representational or cognitive level, t ..."
Abstract - Cited by 140 (5 self) - Add to MetaCart
the neural mechanisms associated with perspective taking, functional magnetic resonance imaging was employed. Data were analyzed using SPM'99 in each subject and nonparametric statistics on the group level. Activations common to 3PP and 1PP (relative to baseline) were observed in a network of occipital

Behavioral theories and the neurophysiology of reward,

by Wolfram Schultz - Annu. Rev. Psychol. , 2006
"... ■ Abstract The functions of rewards are based primarily on their effects on behavior and are less directly governed by the physics and chemistry of input events as in sensory systems. Therefore, the investigation of neural mechanisms underlying reward functions requires behavioral theories that can ..."
Abstract - Cited by 187 (0 self) - Add to MetaCart
provides quantifiable assessments of outcomes under uncertainty and has gone a long way to explain human and animal decision making, even though more recent data cast doubt on the logic in some decision situations A Call for Behavioral Theory Primary sensory systems have dedicated physical and chemical

Impact of Coordinate Transformation Uncertainty on Human Sensorimotor Control

by Erik J. Schlicht, Paul R. Schrater - JOURNAL OF NEUROPHYSIOLOGY , 2007
"... Humans build representations of objects and their locations by integrating imperfect information from multiple perceptual modalities (e.g., visual, haptic). Since sensory information is specified in different frames of reference (i.e. eye- and body-centered), it must be remapped into a common coordi ..."
Abstract - Cited by 5 (0 self) - Add to MetaCart
Humans build representations of objects and their locations by integrating imperfect information from multiple perceptual modalities (e.g., visual, haptic). Since sensory information is specified in different frames of reference (i.e. eye- and body-centered), it must be remapped into a common

Human sensorimotor learning: adaptation, skill, and beyond.

by John W Krakauer , Pietro Mazzoni - Current Opinion in Neurobiology, , 2011
"... Recent studies of upper limb movements have provided insights into the computations, mechanisms, and taxonomy of human sensorimotor learning. Motor tasks differ with respect to how they weight different learning processes. These include adaptation, an internal-model based process that reduces senso ..."
Abstract - Cited by 12 (0 self) - Add to MetaCart
of baseline trials with normal feedback (washout) Representation of adapted mappings Several recent studies have probed the constraints on adaptation to test hypotheses about neural representations of new sensorimotor mappings. Sing et al. What determines how much adaptation to a particular perturbation

Behavioral/Systems/Cognitive EEG-Informed fMRI Reveals Spatiotemporal Characteristics of Perceptual Decision Making

by Marios G. Philiastides, Paul Sajda
"... Single-unit and multiunit recordings in primates have already established that decision making involves at least two general stages of neural processing: representation of evidence from early sensory areas and accumulation of evidence to a decision threshold from decision-related regions. However, t ..."
Abstract - Cited by 31 (6 self) - Add to MetaCart
place in a highly distributed neural network. Of particular importance is an activation in the lateral occipital complex implicating perceptual persistence as a mechanism by which object decision making in the human brain is instigated. Key words: EEG; fMRI; spatiotemporal analysis; perceptual decision

Neural correlates of evidence accumulation in a perceptual decision task

by Taosheng Liu, Timothy J. Pleskac - Journal of Neurophysiology , 2011
"... quential sampling models provide a useful framework for understand-ing human decision making. A key component of these models is an evidence accumulation process in which information is accrued over time to a threshold, at which point a choice is made. Previous neurophysiological studies on perceptu ..."
Abstract - Cited by 5 (0 self) - Add to MetaCart
on perceptual decision making have sug-gested accumulation occurs only in sensorimotor areas involved in making the action for the choice. Here we investigated the neural correlates of evidence accumulation in the human brain using func-tional magnetic resonance imaging (fMRI) while manipulating the quality
Results 1 - 10 of 164