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https://www.readbyqxmd.com/read/28103483/dynamic-interaction-between-reinforcement-learning-and-attention-in-multidimensional-environments
#1
Yuan Chang Leong, Angela Radulescu, Reka Daniel, Vivian DeWoskin, Yael Niv
Little is known about the relationship between attention and learning during decision making. Using eye tracking and multivariate pattern analysis of fMRI data, we measured participants' dimensional attention as they performed a trial-and-error learning task in which only one of three stimulus dimensions was relevant for reward at any given time. Analysis of participants' choices revealed that attention biased both value computation during choice and value update during learning. Value signals in the ventromedial prefrontal cortex and prediction errors in the striatum were similarly biased by attention...
January 18, 2017: Neuron
https://www.readbyqxmd.com/read/28094906/the-impact-of-organizational-innovations-in-nursing-homes-on-staff-perceptions-a-secondary-data-analysis
#2
Joost Adams, Hilde Verbeek, Sandra M G Zwakhalen
PURPOSE: The shift in nursing home care for patients with dementia from traditional task-driven environments towards patient-centered small-scale environments has implications for nursing practice. Information about its implications for nursing staff is lacking, and only a few studies have addressed staff perceptions. We sought to explore staff perceptions of required skills and to determine differences in job satisfaction, motivation, and job characteristics of staff working in both care settings...
January 2017: Journal of Nursing Scholarship
https://www.readbyqxmd.com/read/28088660/processes-of-anticipatory-postural-adjustment-and-step-movement-of-gait-initiation
#3
Hiroki Mizusawa, Yasutomo Jono, Yasuyuki Iwata, Atsushi Kinoshita, Koichi Hiraoka
The purpose of this study was to elucidate whether the anticipatory postural adjustment (APA) and focal step movement of gait initiation are produced as a single process or different processes and whether the APA receives an inhibitory drive from the ongoing stop process of gait initiation. Healthy humans initiated gait in response to a first visual cue that instructed the initial swing leg. In some trials, a switch or stop cue was also provided after the first cue. When the stop cue was provided, participants withheld gait initiation...
January 12, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28087505/2016-update-of-the-asas-eular-management-recommendations-for-axial-spondyloarthritis
#4
Désirée van der Heijde, Sofia Ramiro, Robert Landewé, Xenofon Baraliakos, Filip Van den Bosch, Alexandre Sepriano, Andrea Regel, Adrian Ciurea, Hanne Dagfinrud, Maxime Dougados, Floris van Gaalen, Pál Géher, Irene van der Horst-Bruinsma, Robert D Inman, Merryn Jongkees, Uta Kiltz, Tore K Kvien, Pedro M Machado, Helena Marzo-Ortega, Anna Molto, Victoria Navarro-Compàn, Salih Ozgocmen, Fernando M Pimentel-Santos, John Reveille, Martin Rudwaleit, Jochen Sieper, Percival Sampaio-Barros, Dieter Wiek, Jürgen Braun
To update and integrate the recommendations for ankylosing spondylitis and the recommendations for the use of tumour necrosis factor inhibitors (TNFi) in axial spondyloarthritis (axSpA) into one set applicable to the full spectrum of patients with axSpA. Following the latest version of the European League Against Rheumatism (EULAR) Standardised Operating Procedures, two systematic literature reviews first collected the evidence regarding all treatment options (pharmacological and non-pharmacological) that were published since 2009...
January 13, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28081136/task-irrelevant-external-cues-can-influence-language-selection-in-voluntary-object-naming-evidence-from-hindi-english-bilinguals
#5
Divya Bhatia, Seema Gorur Prasad, Kaushik Sake, Ramesh Kumar Mishra
We examined if external cues such as other agents' actions can influence the choice of language during voluntary and cued object naming in bilinguals in three experiments. Hindi-English bilinguals first saw a cartoon waving at a color patch. They were then asked to either name a picture in the language of their choice (voluntary block) or to name in the instructed language (cued block). The colors waved at by the cartoon were also the colors used as language cues (Hindi or English). We compared the influence of the cartoon's choice of color on naming when speakers had to indicate their choice explicitly before naming (Experiment 1) as opposed to when they named directly on seeing the pictures (Experiment 2 and 3)...
2017: PloS One
https://www.readbyqxmd.com/read/28080113/higher-order-cognitive-control-in-dual-tasks-evidence-from-task-pair-switching
#6
Patricia Hirsch, Sophie Nolden, Iring Koch
In the present study, we combined the psychological refractory period (PRP) paradigm with a novel task-pair switching logic which enabled us to isolate performance costs occurring at the global level of task-pairs. In Experiment 1, in which we used conceptually overlapping responses for Task 1 (T1) and Task 2 (T2), we generated 3 task-pairs by combining 1 of 3 visual tasks (T1) with an auditory task (T2). In addition to worse performance after a short SOA than a long SOA (i.e., PRP effect), we found impaired performance in n - 1 task-pair switches as compared to n - 1 task-pair repetitions (i...
January 12, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/28080086/attentional-capture-by-taboo-words-a-functional-view-of-auditory-distraction
#7
Jan P Röer, Ulrike Körner, Axel Buchner, Raoul Bell
It is well established that task-irrelevant, to-be-ignored speech adversely affects serial short-term memory (STM) for visually presented items compared with a quiet control condition. However, there is an ongoing debate about whether the semantic content of the speech has the capacity to capture attention and to disrupt memory performance. In the present article, we tested whether taboo words are more difficult to ignore than neutral words. Taboo words or neutral words were presented as (a) steady state sequences in which the same distractor word was repeated, (b) changing state sequences in which different distractor words were presented, and (c) auditory deviant sequences in which a single distractor word deviated from a sequence of repeated words...
January 12, 2017: Emotion
https://www.readbyqxmd.com/read/28070785/understanding-behavioural-rigidity-in-autism-spectrum-conditions-the-role-of-intentional-control
#8
Edita Poljac, Vincent Hoofs, Myrthe M Princen, Ervin Poljac
Although behavioural rigidity belongs to the core symptoms of autism spectrum conditions, little is known about its underlying cognitive mechanisms. The current study investigated the role of intentional control mechanisms in behavioural rigidity in autism. Autistic individuals and their matched controls were instructed to repeatedly choose between two simple cognitive tasks and to respond accordingly to the subsequently presented stimulus. Results showed that autistic participants chose to repeat tasks more often than their controls and when choosing to switch, they demonstrated larger performance costs...
January 9, 2017: Journal of Autism and Developmental Disorders
https://www.readbyqxmd.com/read/28069964/task-specific-reorganization-of-the-auditory-cortex-in-deaf-humans
#9
Łukasz Bola, Maria Zimmermann, Piotr Mostowski, Katarzyna Jednoróg, Artur Marchewka, Paweł Rutkowski, Marcin Szwed
The principles that guide large-scale cortical reorganization remain unclear. In the blind, several visual regions preserve their task specificity; ventral visual areas, for example, become engaged in auditory and tactile object-recognition tasks. It remains open whether task-specific reorganization is unique to the visual cortex or, alternatively, whether this kind of plasticity is a general principle applying to other cortical areas. Auditory areas can become recruited for visual and tactile input in the deaf...
January 9, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28069918/posterior-alpha-eeg-dynamics-dissociate-current-from-future-goals-in-working-memory-guided-visual-search
#10
Ingmar E J de Vries, Joram van Driel, Christian N L Olivers
: Current models of visual search assume that search is guided by an active visual working memory representation of what we are currently looking for. This attentional template for currently relevant stimuli can be dissociated from accessory memory representations that are only needed prospectively, for a future task, and that should be prevented from guiding current attention. However, it remains unclear what electrophysiological mechanisms dissociate currently relevant (serving upcoming selection) from prospectively relevant memories (serving future selection)...
January 9, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28068551/investigating-task-inhibition-in-children-versus-adults-a-diffusion-model-analysis
#11
Stefanie Schuch, Kerstin Konrad
One can take n-2 task repetition costs as a measure of inhibition on the level of task sets. When switching back to a Task A after only one intermediate trial (ABA task sequence), Task A is thought to still be inhibited, leading to performance costs relative to task sequences where switching back to Task A is preceded by at least two intermediary trials (CBA). The current study investigated differences in inhibitory ability between children and adults by comparing n-2 task repetition costs in children (9-11years of age, N=32) and young adults (21-30years of age, N=32)...
January 6, 2017: Journal of Experimental Child Psychology
https://www.readbyqxmd.com/read/28068124/cognitive-effort-is-modulated-outside-of-the-explicit-awareness-of-conflict-frequency-evidence-from-pupillometry
#12
Nathaniel T Diede, Julie M Bugg
Classic theories of cognitive control conceptualized controlled processes as slow, strategic, and willful, with automatic processes being fast and effortless. The context-specific proportion compatibility (CSPC) effect, the reduction in the compatibility effect in a context (e.g., location) associated with a high relative to low likelihood of conflict, challenged classic theories by demonstrating fast and flexible control that appears to operate outside of conscious awareness. Two theoretical questions yet to be addressed are whether the CSPC effect is accompanied by context-dependent variation in effort, and whether the exertion of effort depends on explicit awareness of context-specific task demands...
January 9, 2017: Journal of Experimental Psychology. Learning, Memory, and Cognition
https://www.readbyqxmd.com/read/28067417/not-all-distractions-are-the-same-investigating-why-preschoolers-make-distraction-errors-when-switching
#13
Emma Blakey, Daniel J Carroll
When switching between tasks, preschoolers frequently make distraction errors-as distinct from perseverative errors. This study examines for the first time why preschoolers make these errors. One hundred and sixty-four 2- and 3-year-olds completed one of four different conditions on a rule-switching task requiring children to sort stimuli according to one rule and then switch to a new rule. Conditions varied according to the type of information that children needed to ignore. Children made significantly more distraction errors when the to-be-ignored information was related to the previous rule...
January 9, 2017: Child Development
https://www.readbyqxmd.com/read/28056735/effect-of-green-tea-phytochemicals-on-mood-and-cognition
#14
Christina Dietz, Matthijs Dekker
BACKGROUND: Green tea is traditionally known to induce mental clarity, cognitive function, physical activation and relaxation. Recently, a special green tea, matcha tea, is rapidly gaining popularity throughout the world and is frequently referred to as a mood- and brain food. Matcha tea consumption leads to much higher intake of green tea phytochemicals compared to regular green tea. Previous research on tea constituents caffeine, L-theanine, and epigallocatechin gallate (EGCG) repeatedly demonstrated benefits on mood and cognitive performance...
January 5, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28055142/executive-functions-deficits-impair-extinction-of-generalization-of-fear-of-movement-related-pain
#15
N G Niederstrasser, A Meulders, M Meulders, D Struyf, J W Vlaeyen
BACKGROUND: Generalization of fear of movement-related pain across novel but similar movements can lead to fear responses to movements that are actually not associated with pain. The peak-shift effect describes a phenomenon whereby particular novel movements elicit even greater fear responses than the original pain-provoking movement (CS+), because they represent a more extreme version of the CS+. There is great variance in the propensity to generalize as well as the speed of extinction learning when these novel movements are not followed by pain...
January 5, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28052922/who-s-that-knocking-at-my-door-neural-bases-of-sound-source-identification
#16
Guillaume Lemaitre, John A Pyles, Andrea R Halpern, Nicole Navolio, Matthew Lehet, Laurie M Heller
When hearing knocking on a door, a listener typically identifies both the action (forceful and repeated impacts) and the object (a thick wooden board) causing the sound. The current work studied the neural bases of sound source identification by switching listeners' attention toward these different aspects of a set of simple sounds during functional magnetic resonance imaging scanning: participants either discriminated the action or the material that caused the sounds, or they simply discriminated meaningless scrambled versions of them...
January 3, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28049559/workflow-dynamics-and-the-imaging-value-chain-quantifying-the-effect-of-designating-a-nonimage-interpretive-task-workflow
#17
Matthew H Lee, Andrew J Schemmel, B Dustin Pooler, Taylor Hanley, Tabassum A Kennedy, Aaron S Field, Douglas Wiegmann, John-Paul J Yu
PURPOSE: To assess the impact of separate non-image interpretive task and image-interpretive task workflows in an academic neuroradiology practice. MATERIALS AND METHODS: A prospective, randomized, observational investigation of a centralized academic neuroradiology reading room was performed. The primary reading room fellow was observed over a one-month period using a time-and-motion methodology, recording frequency and duration of tasks performed. Tasks were categorized into separate image interpretive and non-image interpretive workflows...
November 15, 2016: Current Problems in Diagnostic Radiology
https://www.readbyqxmd.com/read/28048430/we-fg-207b-03-multi-energy-ct-reconstruction-with-spatial-spectral-nonlocal-means-regularization
#18
B Li, C Shen, L Ouyang, M Yang, L Zhou, S Jiang, X Jia
PURPOSE: Multi-energy computed tomography (MECT) is an emerging application in medical imaging due to its ability of material differentiation and potential for molecular imaging. In MECT, image correlations at different spatial and channels exist. It is desirable to incorporate these correlations in reconstruction to improve image quality. For this purpose, this study proposes a MECT reconstruction technique that employes spatial spectral non-local means (ssNLM) regularization. METHODS: We consider a kVp-switching scanning method in which source energy is rapidly switched during data acquisition...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28045298/rats-show-adaptive-choice-in-a-metacognitive-task-with-high-uncertainty
#19
Shoko Yuki, Kazuo Okanoya
Metacognition refers to the use of one's cognitive processes to coordinate behavior. Many higher cognitive functions such as feeling-of-knowing judgment and theory of mind are thought to be metacognitive processes. Although some primate species also show this ability in the form of behavioral control, a rodent model of metacognition is required for advanced studies of this phenomenon at behavioral, molecular, and neural levels. Here we show that rats could reliably be trained in a metacognitive task. The rats were trained to remember the location of a nose-poke hole and later indicate the location via a behavioral task...
January 2017: Journal of Experimental Psychology. Animal Learning and Cognition
https://www.readbyqxmd.com/read/28044020/auditory-multistability-and-neurotransmitter-concentrations-in-the-human-brain
#20
Hirohito M Kondo, Dávid Farkas, Susan L Denham, Tomohisa Asai, István Winkler
Multistability in perception is a powerful tool for investigating sensory-perceptual transformations, because it produces dissociations between sensory inputs and subjective experience. Spontaneous switching between different perceptual objects occurs during prolonged listening to a sound sequence of tone triplets or repeated words (termed auditory streaming and verbal transformations, respectively). We used these examples of auditory multistability to examine to what extent neurochemical and cognitive factors influence the observed idiosyncratic patterns of switching between perceptual objects...
February 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
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