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perceptual decision making

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https://www.readbyqxmd.com/read/27916665/task-modulations-and-clinical-manifestations-in-the-brain-functional-connectome-in-1615-fmri-datasets
#1
Tobias Kaufmann, Dag Alnæs, Christine Lycke Brandt, Nhat Trung Doan, Karolina Kauppi, Francesco Bettella, Trine V Lagerberg, Akiah O Berg, Srdjan Djurovic, Ingrid Agartz, Ingrid S Melle, Torill Ueland, Ole A Andreassen, Lars T Westlye
OBJECTIVE: An abundance of experimental studies have motivated a range of models concerning the cognitive underpinnings of severe mental disorders, yet the conception that cognitive and brain dysfunction is confined to specific cognitive domains and contexts has limited ecological validity. Schizophrenia and bipolar spectrum disorders have been conceptualized as disorders of brain connectivity; yet little is known about the pervasiveness across cognitive tasks. METHOD: To address this outstanding issue of context specificity, we estimated functional network connectivity from fMRI data obtained during five cognitive tasks (0-back, 2-back, go/no-go, recognition of positive faces, negative faces) in 90 patients with schizophrenia, 97 patients with bipolar spectrum disorder, and 136 healthy controls, including 1615 fMRI datasets in total...
December 1, 2016: NeuroImage
https://www.readbyqxmd.com/read/27882927/global-gain-modulation-generates-time-dependent-urgency-during-perceptual-choice-in-humans
#2
Peter R Murphy, Evert Boonstra, Sander Nieuwenhuis
Decision-makers must often balance the desire to accumulate information with the costs of protracted deliberation. Optimal, reward-maximizing decision-making can require dynamic adjustment of this speed/accuracy trade-off over the course of a single decision. However, it is unclear whether humans are capable of such time-dependent adjustments. Here, we identify several signatures of time-dependency in human perceptual decision-making and highlight their possible neural source. Behavioural and model-based analyses reveal that subjects respond to deadline-induced speed pressure by lowering their criterion on accumulated perceptual evidence as the deadline approaches...
November 24, 2016: Nature Communications
https://www.readbyqxmd.com/read/27872293/emergence-of-an-abstract-categorical-code-enabling-the-discrimination-of-temporally-structured-tactile-stimuli
#3
Román Rossi-Pool, Emilio Salinas, Antonio Zainos, Manuel Alvarez, José Vergara, Néstor Parga, Ranulfo Romo
The problem of neural coding in perceptual decision making revolves around two fundamental questions: (i) How are the neural representations of sensory stimuli related to perception, and (ii) what attributes of these neural responses are relevant for downstream networks, and how do they influence decision making? We studied these two questions by recording neurons in primary somatosensory (S1) and dorsal premotor (DPC) cortex while trained monkeys reported whether the temporal pattern structure of two sequential vibrotactile stimuli (of equal mean frequency) was the same or different...
December 6, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27870892/body-weight-can-change-how-your-emotions-are-perceived
#4
Yujung Oh, Norah C Hass, Seung-Lark Lim
Accurately interpreting other's emotions through facial expressions has important adaptive values for social interactions. However, due to the stereotypical social perception of overweight individuals as carefree, humorous, and light-hearted, the body weight of those with whom we interact may have a systematic influence on our emotion judgment even though it has no relevance to the expressed emotion itself. In this experimental study, we examined the role of body weight in faces on the affective perception of facial expressions...
2016: PloS One
https://www.readbyqxmd.com/read/27866891/confidence-is-the-bridge-between-multi-stage-decisions
#5
Ronald van den Berg, Ariel Zylberberg, Roozbeh Kiani, Michael N Shadlen, Daniel M Wolpert
Demanding tasks often require a series of decisions to reach a goal. Recent progress in perceptual decision-making has served to unite decision accuracy, speed, and confidence in a common framework of bounded evidence accumulation, furnishing a platform for the study of such multi-stage decisions. In many instances, the strategy applied to each decision, such as the speed-accuracy trade-off, ought to depend on the accuracy of the previous decisions. However, as the accuracy of each decision is often unknown to the decision maker, we hypothesized that subjects may carry forward a level of confidence in previous decisions to affect subsequent decisions...
December 5, 2016: Current Biology: CB
https://www.readbyqxmd.com/read/27865552/relationship-between-voice-complaints-and-subjective-and-objective-measures-of-vocal-function-in-iranian-female-teachers
#6
Maryam Faham, Nahid Jalilevand, Farhad Torabinezhad Nejad, Erin Pearson Silverman, Akram Ahmadi, Zahra Ghayoumi Anaraki, Narges Jafari
OBJECTIVES: Teachers are at high risk of developing voice problems because of the excessive vocal demands necessitated by their profession. Teachers' self-assessment of vocal complaints, combined with subjective and objective measures of voice, may enable better therapeutic decision-making. This investigation compared audio-perceptual assessment and acoustic variables in teachers with and without voice complaints. METHODS: Ninety-nine teachers completed this cross-sectional study and were assigned to one of two groups: those "with voice complaint (VC)" and those "without voice complaint (W-VC)...
November 16, 2016: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/27852024/-parietal-association-area-and-motion-information-processing
#7
Takanori Uka
Motion perception plays an important role in everyday life. The investigation of the neural mechanisms underlying the distinguishing of the direction of motion has broadly expanded our understanding of the neural mechanisms of not only visual motion processing but also how integration of visual information is linked with intentional behavior. The lateral intraparietal (LIP) cortex is a crucial area involved in perceptual decision making and oculomotor planning. Here, I have reviewed the neural mechanisms underlying visual motion processing and describe how intentional behavior results from motion information...
November 2016: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/27831722/contributions-of-perceptual-and-motor-experience-of-an-observed-action-to-anticipating-its-result
#8
Yin-Hua Chen, Pei-Hong Lee, Yu-Wen Lu, Shih-Kuei Huang, Nai-Shing Yen
To gain deeper insight into respective contributions of perceptual and motor experience of an observed action to anticipating its result, we examined the perceptual anticipation of players with different action roles in striking sports. Baseball pitchers and batters at both advanced and intermediate levels were asked to make a decision about whether to swing the bat when viewing a series of videos showing incomplete sequences of a model pitcher throwing a strike or a ball. The results revealed that first 100 ms of ball flight could discriminate advanced batters from intermediate pitchers and batters (with no difference between intermediate pitchers and batters)...
November 10, 2016: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/27829041/cognitive-bias-in-ambiguity-judgements-using-computational-models-to-dissect-the-effects-of-mild-mood-manipulation-in-humans
#9
Kiyohito Iigaya, Aurelie Jolivald, Wittawat Jitkrittum, Iain D Gilchrist, Peter Dayan, Elizabeth Paul, Michael Mendl
Positive and negative moods can be treated as prior expectations over future delivery of rewards and punishments. This provides an inferential foundation for the cognitive (judgement) bias task, now widely-used for assessing affective states in non-human animals. In the task, information about affect is extracted from the optimistic or pessimistic manner in which participants resolve ambiguities in sensory input. Here, we report a novel variant of the task aimed at dissecting the effects of affect manipulations on perceptual and value computations for decision-making under ambiguity in humans...
2016: PloS One
https://www.readbyqxmd.com/read/27826262/editorial-modeling-individual-differences-in-perceptual-decision-making
#10
EDITORIAL
Joseph W Houpt, Cheng-Ta Yang, James T Townsend
No abstract text is available yet for this article.
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/27819455/information-foraging-for-perceptual-decisions
#11
Casimir J H Ludwig, David R Evens
We tested an information foraging framework to characterize the mechanisms that drive active (visual) sampling behavior in decision problems that involve multiple sources of information. Experiments 1 through 3 involved participants making an absolute judgment about the direction of motion of a single random dot motion pattern. In Experiment 4, participants made a relative comparison between 2 motion patterns that could only be sampled sequentially. Our results show that: (a) Information (about noisy motion information) grows to an asymptotic level that depends on the quality of the information source; (b) The limited growth is attributable to unequal weighting of the incoming sensory evidence, with early samples being weighted more heavily; (c) Little information is lost once a new source of information is being sampled; and (d) The point at which the observer switches from 1 source to another is governed by online monitoring of his or her degree of (un)certainty about the sampled source...
November 7, 2016: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/27816779/performance-monitoring-for-brain-computer-interface-actions
#12
Aaron Schurger, Steven Gale, Olivia Gozel, Olaf Blanke
When presented with a difficult perceptual decision, human observers are able to make metacognitive judgements of subjective certainty. Such judgements can be made independently of and prior to any overt response to a sensory stimulus, presumably via internal monitoring. Retrospective judgements about one's own task performance, on the other hand, require first that the subject perform a task and thus could potentially be made based on motor processes, proprioceptive, and other sensory feedback rather than internal monitoring...
November 2, 2016: Brain and Cognition
https://www.readbyqxmd.com/read/27815241/using-sounds-for-making-decisions-greater-tube-nosed-bats-prefer-antagonistic-calls-over-noncommunicative-sounds-when-feeding
#13
Tinglei Jiang, Zhenyu Long, Xin Ran, Xue Zhao, Fei Xu, Fuyuan Qiu, Jagmeet S Kanwal, Jiang Feng
Bats vocalize extensively within different social contexts. The type and extent of information conveyed via their vocalizations and their perceptual significance, however, remains controversial and difficult to assess. Greater tube-nosed bats, M. leucogaster, emit calls consisting of long rectangular broadband noise burst (rBNBl) syllables during aggression between males. To experimentally test the behavioral impact of these sounds for feeding, we deployed an approach and place-preference paradigm. Two food trays were placed on opposite sides and within different acoustic microenvironments, created by sound playback, within a specially constructed tent...
November 4, 2016: Biology Open
https://www.readbyqxmd.com/read/27801629/perceptual-cognitive-skill-and-the-in-situ-performance-of-soccer-players
#14
Mariëtte J J van Maarseveen, Raôul R D Oudejans, David L Mann, Geert J P Savelsbergh
Many studies have shown that experts possess better perceptual-cognitive skills than novices (e.g., in anticipation, decision making, pattern recall), but it remains unclear whether a relationship exists between performance on those tests of perceptual-cognitive skill and actual on-field performance. In this study, we assessed the in situ performance of skilled soccer players and related the outcomes to measures of anticipation, decision making, and pattern recall. In addition, we examined gaze behaviour when performing the perceptual-cognitive tests to better understand whether the underlying processes were related when those perceptual-cognitive tasks were performed...
November 21, 2016: Quarterly Journal of Experimental Psychology: QJEP
https://www.readbyqxmd.com/read/27787198/the-influence-of-evidence-volatility-on-choice-reaction-time-and-confidence-in-a-perceptual-decision
#15
Ariel Zylberberg, Christopher R Fetsch, Michael N Shadlen
Many decisions are thought to arise via the accumulation of noisy evidence to a threshold or bound. In perception, the mechanism explains the effect of stimulus strength, characterized by signal-to-noise ratio, on decision speed, accuracy and confidence. It also makes intriguing predictions about the noise itself. An increase in noise should lead to faster decisions, reduced accuracy and, paradoxically, higher confidence. To test these predictions, we introduce a novel sensory manipulation that mimics the addition of unbiased noise to motion-selective regions of visual cortex, which we verified with neuronal recordings from macaque areas MT/MST...
October 27, 2016: ELife
https://www.readbyqxmd.com/read/27784196/the-effect-of-inserting-an-inter-stimulus-interval-in-face-voice-matching-tasks
#16
Harriet M J Smith, Andrew K Dunn, Thom Baguley, Paula C Stacey
Voices and static faces can be matched for identity above chance level. No previous face-voice matching experiments have included an inter-stimulus interval (ISI) exceeding 1 second. We tested whether accurate identity decisions rely on high-quality perceptual representations temporarily stored in sensory memory, and therefore whether the ability to make accurate matching decisions diminishes as the ISI increases. In each trial, participants had to decide whether an unfamiliar face and voice belonged to the same person...
October 27, 2016: Quarterly Journal of Experimental Psychology: QJEP
https://www.readbyqxmd.com/read/27776633/unexpected-arousal-modulates-the-influence-of-sensory-noise-on-confidence
#17
Micah Allen, Darya Frank, D Samuel Schwarzkopf, Francesca Fardo, Joel S Winston, Tobias U Hauser, Geraint Rees
Human perception is invariably accompanied by a graded feeling of confidence that guides metacognitive awareness and decision-making. It is often assumed that this arises solely from the feed-forward encoding of the strength or precision of sensory inputs. In contrast, interoceptive inference models suggest that confidence reflects a weighted integration of sensory precision and expectations about internal states, such as arousal. Here we test this hypothesis using a novel psychophysical paradigm, in which unseen disgust-cues induced unexpected, unconscious arousal just before participants discriminated motion signals of variable precision...
October 25, 2016: ELife
https://www.readbyqxmd.com/read/27767240/a-somatosensory-to-motor-cascade-of-cortical-areas-engaged-in-perceptual-decision-making-during-tactile-pattern-discrimination
#18
Yiwen Li Hegner, Axel Lindner, Christoph Braun
The processes underlying perceptual decision making are diverse and typically engage a distributed network of brain areas. It is a particular challenge to establish a sensory-to-motor functional hierarchy in such networks. This is because single-cell recordings mainly study the nodes of decision networks in isolation but seldom simultaneously. Moreover, imaging methods, which allow simultaneously accessing information from overall networks, typically suffer from either the temporal or the spatial resolution necessary to establish a detailed functional hierarchy in terms of a sequential recruitment of areas during a decision process...
October 21, 2016: Human Brain Mapping
https://www.readbyqxmd.com/read/27756416/agreement-between-triage-category-and-patient-s-perception-of-priority-in-emergency-departments
#19
Ghasem-Sam Toloo, Peter Aitken, Julia Crilly, Gerry FitzGerald
BACKGROUND: Patients attending hospital emergency departments (ED) commonly cite the urgency and severity of their condition as the main reason for choosing the ED. However, the patients' perception of urgency and severity may be different to the nurses' perception of their urgency and severity, which is underpinned by their professional experience, knowledge, training and skills. This discordance may be a cause of patient dissatisfaction. The purpose of this study is to understand the extent of agreement/disagreement between the patient's perceived priority and actual triage category and associated factors...
October 18, 2016: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
https://www.readbyqxmd.com/read/27732040/understanding-perceptual-judgment-in-autism-spectrum-disorder-using-the-drift-diffusion-model
#20
Angelo Pirrone, Abigail Dickinson, Rosanna Gomez, Tom Stafford, Elizabeth Milne
Objective: Two-alternative forced-choice tasks are widely used to gain insight into specific areas of enhancement or impairment in individuals with autism spectrum disorder (ASD). Data arising from these tasks have been used to support myriad theories regarding the integrity, or otherwise, of particular brain areas or cognitive processes in ASD. The drift diffusion model (DDM) provides an account of the underlying processes which give rise to accuracy and reaction time (RT) distributions, and parameterizes these processes in terms which have direct psychological interpretation...
October 10, 2016: Neuropsychology
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