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Dynamic decision making

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https://www.readbyqxmd.com/read/28641107/the-persistence-and-transience-of-memory
#1
REVIEW
Blake A Richards, Paul W Frankland
The predominant focus in the neurobiological study of memory has been on remembering (persistence). However, recent studies have considered the neurobiology of forgetting (transience). Here we draw parallels between neurobiological and computational mechanisms underlying transience. We propose that it is the interaction between persistence and transience that allows for intelligent decision-making in dynamic, noisy environments. Specifically, we argue that transience (1) enhances flexibility, by reducing the influence of outdated information on memory-guided decision-making, and (2) prevents overfitting to specific past events, thereby promoting generalization...
June 21, 2017: Neuron
https://www.readbyqxmd.com/read/28637183/nuclitrack-an-integrated-nuclei-tracking-application
#2
Sam Cooper, Alexis R Barr, Robert Glen, Chris Bakal
Summary: Live imaging studies give unparalleled insight into dynamic single cell behaviours and fate decisions. However, the challenge of reliably tracking single cells over long periods of time limits both the throughput and ease with which such studies can be performed. Here, we present NucliTrack, a cross platform solution for automatically segmenting, tracking and extracting features from fluorescently-labelled nuclei. NucliTrack performs similarly to other state-of-the-art cell tracking algorithms, but NucliTrack's interactive, graphical interface makes it significantly more user friendly...
June 20, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28634436/dual-coding-theory-explains-biphasic-collective-computation-in-neural-decision-making
#3
Bryan C Daniels, Jessica C Flack, David C Krakauer
A central question in cognitive neuroscience is how unitary, coherent decisions at the whole organism level can arise from the distributed behavior of a large population of neurons with only partially overlapping information. We address this issue by studying neural spiking behavior recorded from a multielectrode array with 169 channels during a visual motion direction discrimination task. It is well known that in this task there are two distinct phases in neural spiking behavior. Here we show Phase I is a distributed or incompressible phase in which uncertainty about the decision is substantially reduced by pooling information from many cells...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28632444/the-structural-consequences-of-big-data-driven-education
#4
Elana Zeide
Educators and commenters who evaluate big data-driven learning environments focus on specific questions: whether automated education platforms improve learning outcomes, invade student privacy, and promote equality. This article puts aside separate unresolved-and perhaps unresolvable-issues regarding the concrete effects of specific technologies. It instead examines how big data-driven tools alter the structure of schools' pedagogical decision-making, and, in doing so, change fundamental aspects of America's education enterprise...
June 2017: Big Data
https://www.readbyqxmd.com/read/28631389/to-stand-back-or-step-in-exploring-the-responses-of-employees-who-observe-workplace-bullying
#5
Sarah MacCurtain, Caroline Murphy, Michelle O'Sullivan, Juliet MacMahon, Tom Turner
Bullying remains a pervasive problem in healthcare, and evidence suggests systems in place are not utilised due to perceptions of ineffectiveness and inequity. This study examines bystander responses to bullying and factors that influence decisions to intervene. We explore relationships between bystanders' perceptions of psychological safety across three levels (organisation, supervisor and colleague) and reactions to witnessing bullying. We suggest psychological safety would be positively associated with the decision to intervene...
June 20, 2017: Nursing Inquiry
https://www.readbyqxmd.com/read/28629262/dynamic-modelling-of-n-of-1-data-powerful-and-flexible-data-analytics-applied-to-individualised-studies
#6
Rute V Vieira, Suzanne McDonald, Vera Araújo-Soares, Falko F Sniehotta, Robin Henderson
N-of-1 studies are based on repeated observations within an individual or unit over time and are acknowledged as an important research method for generating scientific evidence about the health or behaviour of an individual. Statistical analyses of n-of-1 data require accurate modelling of the outcome while accounting for its distribution, time-related trend and error structures (e.g. autocorrelation) as well as reporting readily usable contextualised effect sizes for decision-making. A number of statistical approaches have been documented but no consensus exists on which method is most appropriate for which type of n-of-1 design...
June 20, 2017: Health Psychology Review
https://www.readbyqxmd.com/read/28627310/comparing-cluster-level-dynamic-treatment-regimens-using-sequential-multiple-assignment-randomized-trials-regression-estimation-and-sample-size-considerations
#7
Timothy NeCamp, Amy Kilbourne, Daniel Almirall
Cluster-level dynamic treatment regimens can be used to guide sequential treatment decision-making at the cluster level in order to improve outcomes at the individual or patient-level. In a cluster-level dynamic treatment regimen, the treatment is potentially adapted and re-adapted over time based on changes in the cluster that could be impacted by prior intervention, including aggregate measures of the individuals or patients that compose it. Cluster-randomized sequential multiple assignment randomized trials can be used to answer multiple open questions preventing scientists from developing high-quality cluster-level dynamic treatment regimens...
January 1, 2017: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/28624364/decision-making-in-swiss-home-like-childbirth-a-grounded-theory-study
#8
Yvonne Meyer, Franziska Frank, Franziska Schläppy Muntwyler, Valerie Fleming, Jessica Pehlke-Milde
BACKGROUND: Decision-making in midwifery, including a claim for shared decision-making between midwives and women, is of major significance for the health of mother and child. Midwives have little information about how to share decision-making responsibilities with women, especially when complications arise during birth. AIM: To increase understanding of decision-making in complex home-like birth settings by exploring midwives' and women's perspectives and to develop a dynamic model integrating participatory processes for making shared decisions...
June 14, 2017: Women and Birth: Journal of the Australian College of Midwives
https://www.readbyqxmd.com/read/28622412/textural-analysis-of-early-phase-spatiotemporal-changes-in-contrast-enhancement-of-breast-lesions-imaged-with-an-ultrafast-dce-mri-protocol
#9
Jana Milenković, Mehmet Ufuk Dalmış, Janez Žgajnar, Bram Platel
PURPOSE: New ultrafast view-sharing sequences have enabled breast dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) to be performed at high spatial and temporal resolution. The aim of this study is to evaluate the diagnostic potential of textural features that quantify the spatiotemporal changes of the contrast-agent uptake in computer-aided diagnosis of malignant and benign breast lesions imaged with high spatial and temporal resolution DCE-MRI. METHOD: The proposed approach is based on the textural analysis quantifying the spatial variation of six dynamic features of the early-phase contrast-agent uptake of a lesion's largest cross-sectional area...
June 16, 2017: Medical Physics
https://www.readbyqxmd.com/read/28618584/model-of-the-best-of-n-nest-site-selection-process-in-honeybees
#10
Andreagiovanni Reina, James A R Marshall, Vito Trianni, Thomas Bose
The ability of a honeybee swarm to select the best nest site plays a fundamental role in determining the future colony's fitness. To date, the nest-site selection process has mostly been modeled and theoretically analyzed for the case of binary decisions. However, when the number of alternative nests is larger than two, the decision-process dynamics qualitatively change. In this work, we extend previous analyses of a value-sensitive decision-making mechanism to a decision process among N nests. First, we present the decision-making dynamics in the symmetric case of N equal-quality nests...
May 2017: Physical Review. E
https://www.readbyqxmd.com/read/28618018/executive-functions-memory-and-social-cognitive-deficits-and-recovery-in-chronic-alcoholism-a-critical-review-to-inform-future-research
#11
Anne-Pascale Le Berre, Rosemary Fama, Edith V Sullivan
Alcoholism is a complex and dynamic disease, punctuated by periods of abstinence and relapse, and influenced by a multitude of vulnerability factors. Chronic excessive alcohol consumption is associated with cognitive deficits, ranging from mild to severe, in executive functions, memory, and metacognitive abilities, with associated impairment in emotional processes and social cognition. These deficits can compromise efforts in initiating and sustaining abstinence by hampering efficacy of clinical treatment and can obstruct efforts in enabling good decision-making, success in interpersonal/social interactions, and awareness of cognitive and behavioral dysfunctions...
June 15, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28610901/neural-dynamics-of-two-players-when-using-nonverbal-cues-to-gauge-intentions-to-cooperate-during-the-prisoner-s-dilemma-game
#12
Jaehwan Jahng, Jerald D Kralik, Dong-Uk Hwang, Jaeseung Jeong
Social interaction is a fundamental part of our daily lives; however, exactly how our brains use social cues to determine whether to cooperate without being exploited remains unclear. In this study, we used an electroencephalography (EEG) hyperscanning approach to investigate the effect of face-to-face contact on the brain mechanisms underlying the decision to cooperate or defect in an iterated version of the Prisoner's Dilemma Game. Participants played the game either in face-to-face or face-blocked conditions...
June 10, 2017: NeuroImage
https://www.readbyqxmd.com/read/28610754/power-and-ambivalence-in-intergenerational-communication-deciding-to-institutionalize-in-shanghai
#13
Lin Chen
China's tradition of taking care of one's aging parents continues to evolve, as evidenced by the growth in nursing home residents in Shanghai. However, how these families make the decision to institutionalize remains unclear. To fill this gap, this study draws on power relations to examine communication dynamics when oldest-old and their adult children decide to institutionalize. This study used a phenomenological approach. Twelve dyads of matched elderly residents and their children participated in face-to-face, in-depth interviews (N=24)...
April 2017: Journal of Aging Studies
https://www.readbyqxmd.com/read/28603078/gatekeepers-in-the-healthcare-sector-knowledge-and-bourdieu-s-concept-of-field
#14
Fran M Collyer, Karen F Willis, Sophie Lewis
Choice is an imperative for patients in the Australian healthcare system. The complexity of this healthcare 'maze', however, means that successfully navigating and making choices depends not only on the decisions of patients, but also other key players in the healthcare sector. Utilising Bourdieu's concepts of capital, habitus and field, we analyse the role of gatekeepers (i.e., those who control access to resources, services and knowledge) in shaping patients' experiences of healthcare, and producing opportunities to enable or constrain their choices...
June 3, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28602241/incorporating-biological-control-into-ipm-decision-making
#15
REVIEW
Kristopher L Giles, Brian P McCornack, Tom A Royer, Norman C Elliott
Of the many ways biological control can be incorporated into Integrated Pest Management (IPM) programs, natural enemy thresholds are arguably most easily adopted by stakeholders. Integration of natural enemy thresholds into IPM programs requires ecological and cost/benefit crop production data, threshold model validation, and an understanding of the socioeconomic factors that influence stakeholder decisions about biological control. These thresholds are more likely to be utilized by stakeholders when integrated into dynamic web-based IPM decision support systems that summarize pest management data and push site-specific biological control management recommendations to decision-makers...
April 2017: Current Opinion in Insect Science
https://www.readbyqxmd.com/read/28601427/games-of-corruption-in-preventing-the-overuse-of-common-pool-resources
#16
Joung-Hun Lee, Marko Jusup, Yoh Iwasa
Maintaining human cooperation in the context of common-pool resource management is extremely important because otherwise we risk overuse and corruption. To analyse the interplay between economic and ecological factors leading to corruption, we couple the resource dynamics and the evolutionary dynamics of strategic decision making into a powerful analytical framework. The traits of this framework are: (i) an arbitrary number of harvesters share the responsibility to sustainably exploit a specific part of an ecosystem, (ii) harvesters face three strategic choices for exploiting the resource, (iii) a delegated enforcement system is available if called upon, (iv) enforcers are either honest or corrupt, and (v) the resource abundance reflects the choice of harvesting strategies...
June 7, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28601116/nonlinearities-in-behavioral-macroeconomics
#17
Orlando Gomes
This article undertakes a journey across the literature on behavioral macroeconomics, with attention concentrated on the nonlinearities that the behavioral approach typically suggests or implies. The emphasis is placed on thinking the macro economy as a living organism, composed of many interacting parts, each one having a will of its own, which is in sharp contrast with the mechanism of the orthodox view (well represented by the neoclassical or new Keynesian dynamic stochastic general equilibrium - DSGE - model)...
July 2017: Nonlinear Dynamics, Psychology, and Life Sciences
https://www.readbyqxmd.com/read/28601112/the-role-of-dysfunctional-myths-in-a-decision-making-process-under-bounded-rationality-a-complex-dynamical-systems-perspective
#18
Dimitrios Stamovlasis, Julie Vaiopoulou
The present study examines the factors influencing a decision-making process, with specific focus on the role of dysfunctional myths (DM). DM are thoughts or beliefs that are rather irrational, however influential to people's decisions. In this paper a decision-making process regarding the career choice of university students majoring in natural sciences and education (N=496) is examined by analyzing survey data taken via Career Decision Making Difficulties Questionnaire (CDDQ). The difficulty of making the choice and the certainty about one's decision were the state variables, while the independent variables were factors related to the lack of information or knowledge needed, which actually reflect a bounded rationality...
July 2017: Nonlinear Dynamics, Psychology, and Life Sciences
https://www.readbyqxmd.com/read/28594210/are-risk-assessments-racially-biased-field-study-of-the-savry-and-yls-cmi-in-probation
#19
Rachael T Perrault, Gina M Vincent, Laura S Guy
Risk assessment instruments are widely used by juvenile probation officers (JPOs) to make case management decisions; however, few studies have investigated whether these instruments maintain their predictive validity when completed by JPOs in the field. Moreover, the validity of these instruments for use with minority groups has been called into question. This field study examined the predictive validity of both the Structured Assessment of Violence Risk in Youth (SAVRY; n = 383) and the Youth Level of Service/Case Management Inventory (YLS/CMI; n = 359) for reoffending when completed by JPOs...
June 2017: Psychological Assessment
https://www.readbyqxmd.com/read/28593190/nucleus-accumbens-shell-dopamine-preferentially-tracks-information-related-to-outcome-value-of-reward
#20
Deirdre A Sackett, Michael P Saddoris, Regina M Carelli
Effective decision-making requires organisms to predict reward values and bias behavior toward the best available option. The mesolimbic dopamine system, including the nucleus accumbens (NAc) shell and core, is involved in this process. Although studies support a role of the shell and core in specific aspects of decision-making (e.g., risk, effort, delay), no studies have directly compared dopamine release dynamics in these subregions to cues exclusively signaling the availability of different reward magnitudes...
May 2017: ENeuro
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