The role of working memory in compulsive checking and OCD: A systematic classification of 58 experimental findings

This chapter provides an overview of the prevalence and classification of error types in radiology, including the frequency and types of errors made by radiologists. We will review the relative contribution of perceptual error—in which findings are simply not seen—as compared to other common types of error. This error epidemiology will be considered in the light of the underlying variability and uncertainties present in the radiological process. The role of key cognitive biases will also be reviewed, including anchoring bias, confirmation bias, and availability bias. The role of attentional focus, working memory, and problems caused by fatigue and interruption will also be explored. Finally, the problem of radiologist error will be considered in the context of the overall problem of diagnostic error in medicine.

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Textural analysis and emplacement conditions of well-preserved Orosirian felsic volcanic rocks of Northern Amazon Craton, Brazil

10.31223/x5dg80 ◽

2021 ◽

Author(s):

Carla Joana Barreto ◽

Mauricio Haag ◽

Jean Michel Lafon ◽

Carlos Sommer ◽

Lúcia Travassos da Rosa-Costa

Keyword(s):

Volcanic Rocks ◽

Rheological Parameters ◽

Systematic Classification ◽

Igneous Provinces ◽

Long Time ◽

Volcaniclastic Rocks ◽

Felsic Volcanic ◽

Textural Analyses

Located in the Amazon Craton, the Uatumã magmatism (1.89-1.87 Ga) consists in one of the oldest Silicic Large Igneous Provinces (SLIPs) on Earth. For a long time, the access to these deposits in the northern Amazon Craton (Erepecuru–Trombetas Domain) has been set back for volcanological studies due to dense vegetation cover and the absence of roads. Recent studies identify two Orosirian volcanic units in the region: the Iricoumé Group (1.89-1.87 Ga) related to the Uatumã magmatism, and the Igarapé Paboca Formation (1.99-1.94 Ga), associated to an older magmatism. Both units are widespread in the Erepecuru–Trombetas Domain and include effusive and explosive deposits. In this paper, we apply textural analyses and rheological estimations to determine the eruption and emplacement conditions of these two volcanic sequences. Textural analyses were carried out through fieldwork and petrography, including a systematic classification of lavas and volcaniclastic rocks. Rheological parameters were determined using geochemistry data to obtain melt viscosity (η) and temperature, zircon saturation (TZr), liquidus (TL), and glass transition temperatures (TG), for anhydrous and hydrous compositions. Textural analyses indicate the predominance of volcaniclastic facies with abundant eutaxitic and parataxitic textures. Rheological estimations reveal TL of 1020ºC, TZr 650-905ºC, and TG 640-753ºC for anhydrous Iricoumé Group melts. Eruptive viscosity estimations range from 8.4 to 11.7 log η (Pa.s). Igarapé Paboca melts present higher temperatures, with TL of 1050ºC, TZr 710-880ºC, and TG 670-740 ºC. Modeling using hydrous compositions indicate that minute amounts of water can strongly affect the rheology of the studied melts, reducing η, TL, TZr, and TG. The petrographic features indicative of hydrous magma reinforces the role of H2O as a controlling agent in the fragmentation of Iricoumé and Igarapé Paboca melts. The pyroclastic samples are marked by elevated ∆TZr - TG relationships indicative of high emplacement temperatures above the TG. Our results indicate that the high temperatures and the presence of network-modifier cations in the studied melts favored the development of extensive welded ignimbrites associated with low-eruption columns, likely developed in fissural and/or caldera systems.

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Dependence of Working Memory on Coordinated Activity Across Brain Areas

Frontiers in Systems Neuroscience ◽

10.3389/fnsys.2021.787316 ◽

2022 ◽

Vol 15 ◽

Author(s):

Ehsan Rezayat ◽

Kelsey Clark ◽

Mohammad-Reza A. Dehaqani ◽

Behrad Noudoost

Keyword(s):

Working Memory ◽

Brain Area ◽

Critical Role ◽

Brain Disorders ◽

Brain Areas ◽

Neural Substrate ◽

Oscillatory Power ◽

Experimental Findings ◽

Neural Signatures

Neural signatures of working memory (WM) have been reported in numerous brain areas, suggesting a distributed neural substrate for memory maintenance. In the current manuscript we provide an updated review of the literature focusing on intracranial neurophysiological recordings during WM in primates. Such signatures of WM include changes in firing rate or local oscillatory power within an area, along with measures of coordinated activity between areas based on synchronization between oscillations. In comparing the ability of various neural signatures in any brain area to predict behavioral performance, we observe that synchrony between areas is more frequently and robustly correlated with WM performance than any of the within-area neural signatures. We further review the evidence for alteration of inter-areal synchrony in brain disorders, consistent with an important role for such synchrony during behavior. Additionally, results of causal studies indicate that manipulating synchrony across areas is especially effective at influencing WM task performance. Each of these lines of research supports the critical role of inter-areal synchrony in WM. Finally, we propose a framework for interactions between prefrontal and sensory areas during WM, incorporating a range of experimental findings and offering an explanation for the observed link between intra-areal measures and WM performance.

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Working Memory and Number Sense as Predictors of Mathematical (Dis-)Ability

Zeitschrift für Psychologie ◽

10.1027/2151-2604/a000208 ◽

2015 ◽

Vol 223 (2) ◽

pp. 102-109 ◽

Cited By ~ 13

Author(s):

Evelyn H. Kroesbergen ◽

Marloes van Dijk

Keyword(s):

Working Memory ◽

Learning Disabilities ◽

Spatial Working Memory ◽

Number Sense ◽

Mathematical Learning ◽

Visual Spatial ◽

Mathematical Learning Disabilities ◽

Visual Spatial Working Memory ◽

And Mathematics

Recent research has pointed to two possible causes of mathematical (dis-)ability: working memory and number sense, although only few studies have compared the relations between working memory and mathematics and between number sense and mathematics. In this study, both constructs were studied in relation to mathematics in general, and to mathematical learning disabilities (MLD) in particular. The sample consisted of 154 children aged between 6 and 10 years, including 26 children with MLD. Children performing low on either number sense or visual-spatial working memory scored lower on math tests than children without such a weakness. Children with a double weakness scored the lowest. These results confirm the important role of both visual-spatial working memory and number sense in mathematical development.

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Working Memory Capacity and a Notorious Brain Teaser

Experimental Psychology (formerly Zeitschrift für Experimentelle Psychologie) ◽

10.1027/1618-3169.53.1.123 ◽

2006 ◽

Vol 53 (2) ◽

pp. 123-131 ◽

Cited By ~ 29

Author(s):

Wim De Neys ◽

Niki Verschueren

Keyword(s):

Working Memory ◽

Secondary Task ◽

Working Memory Capacity ◽

Memory Capacity ◽

Task Load ◽

Normative Reasoning ◽

Monty Hall Dilemma ◽

Monty Hall ◽

Memory Resources

Abstract. The Monty Hall Dilemma (MHD) is an intriguing example of the discrepancy between people’s intuitions and normative reasoning. This study examines whether the notorious difficulty of the MHD is associated with limitations in working memory resources. Experiment 1 and 2 examined the link between MHD reasoning and working memory capacity. Experiment 3 tested the role of working memory experimentally by burdening the executive resources with a secondary task. Results showed that participants who solved the MHD correctly had a significantly higher working memory capacity than erroneous responders. Correct responding also decreased under secondary task load. Findings indicate that working memory capacity plays a key role in overcoming salient intuitions and selecting the correct switching response during MHD reasoning.

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