Working memory, executive function and impulsivity in Internet-addictive disorders: a comparison with pathological gambling

2015 ◽  
Vol 28 (2) ◽  
pp. 92-100 ◽  
Author(s):  
Zhenhe Zhou ◽  
Hongliang Zhou ◽  
Hongmei Zhu
Keyword(s):  
Working Memory ◽  
Executive Function ◽  
Pathological Gambling ◽  
False Alarm ◽  
False Alarm Rate ◽  
Digit Span ◽  
Wisconsin Card Sorting Test ◽  
Control Group ◽  
Addictive Disorders ◽  
Hit Rate

ObjectiveThe purpose of the present study was to test whether individuals with Internet addiction disorder (IAD) presented analogous characteristics of working memory, executive function and impulsivity compared with pathological gambling (PG) patients.MethodsThe subjects included 23 individuals with IAD, 23 PG patients and 23 controls. All of the participants were measured with the digit span task, Wisconsin Card Sorting Test, go/no-go task and Barratt Impulsiveness Scale-11 (BIS-11) under the same experimental conditions.ResultsThe results of this study showed that the false alarm rate, total response errors, perseverative errors, failure to maintain set and BIS-11 scores of both the IAD and PG groups were significantly higher than that of the control group. In addition, the forward scores and backwards scores, percentage of conceptual level responses, number of categories completed and hit rate of the IAD and PG groups were significantly lower than that of the control group. Furthermore, the false alarm rate and BIS-11 scores of the IAD group were significantly higher than those of PG patients, and the hit rate was significantly lower than that of the PG patients.ConclusionsIndividuals with IAD and PG patients present deficiencies in working memory, executive dysfunction and impulsivity, and individuals with IAD are more impulsive than PG patients.

scholarly journals Measuring memory is harder than you think: A crisis of measurement in memory research

2021 ◽  
Author(s):  
Timothy F. Brady ◽  
Maria Martinovna Robinson ◽  
Jamal Rodgers Williams ◽  
John Wixted
Keyword(s):  
Working Memory ◽  
False Alarm ◽  
False Alarm Rate ◽  
Eyewitness Identification ◽  
Memory Performance ◽  
Memory Task ◽  
Theory And Practice ◽  
Memory Research ◽  
Hit Rate ◽  
Memory Signals

There is a crisis of measurement in memory research, with major implications for theory and practice. This crisis arises because of a critical complication present when measuring memory using the recognition memory task that dominates the study of working memory and long-term memory (“did you see this item? yes/no” or “did this item change? yes/no”). Such tasks give two measures of performance, the “hit rate” (how often you say you previously saw an item you actually did previously see) and the “false alarm rate” (how often you say you saw something you never saw). Yet what researchers want is one single, integrated measure of memory performance. Integrating the hit and false alarm rate into a single measure, however, requires a complex problem of counterfactual reasoning that depends on the (unknowable) distribution of underlying memory signals: when faced with two people differing in both hit rate and false alarm rate, the question of who had the better memory is really “who would have had more hits if they each had the same number of false alarms”. As a result of this difficulty, different literatures in memory research (e.g., visual working memory, eyewitness identification, picture memory, etc) have settled on a variety of distinct metrics to combine hit rates and false alarm rates (e.g., A’, corrected hit rate, percent correct, d’, diagnosticity ratios, K values, etc.). These metrics make different, contradictory assumptions about the distribution of latent memory signals, and all of their assumptions are frequently incorrect. Despite a large literature on how to properly measure memory performance, spanning decades, real-life decisions are often made using these metrics, even when they subsequently turn out to be wrong when memory is studied with better measures. We suggest that in order for the psychology and neuroscience of memory to become a cumulative, theory-driven science, more attention must be given to measurement issues. We make a concrete suggestion: the default memory task should change from old/new (“did you see this item’?”) to forced-choice (“which of these two items did you see?”). In situations where old/new variants are preferred (e.g., eyewitness identification; theoretical investigations of the nature of memory decisions), receiver operating characteristic (ROC) analysis should always be performed.

Executive Function Deficits in Patients after Cerebellar Neurosurgery

2015 ◽  
Vol 22 (1) ◽  
pp. 47-57 ◽  
Author(s):  
Monika Mak ◽  
Ernest Tyburski ◽  
Łukasz Madany ◽  
Andrzej Sokołowski ◽  
Agnieszka Samochowiec
Keyword(s):  
Working Memory ◽  
Executive Functions ◽  
Response Times ◽  
Digit Span ◽  
Wisconsin Card Sorting Test ◽  
Control Group ◽  
Card Sorting ◽  
Mediating Role ◽  
Regulatory Processes ◽  
Perseverative Errors

AbstractThe cerebellum has long been perceived as a structure responsible for the human motor function. According to the contemporary approach, however, it plays a significant role in complex behavior regulatory processes. The aim of this study was to describe executive functions in patients after cerebellar surgery. The study involved 30 patients with cerebellar pathology. The control group comprised 30 neurologically and mentally healthy individuals, matched for sex, age, and number of years of education. Executive functions were measured by the Wisconsin Card Sorting Test (WCST), Stroop Color Word Test (SCWT), Trail Making Test (TMT), and working memory by the Digit Span. Compared to healthy controls, patients made more Errors and Perseverative errors in the WCST, gave more Perseverative responses, and had a lower Number of categories completed. The patients exhibited higher response times in all three parts of the SCWT and TMT A and B. No significant differences between the two groups were reported in their performance of the SCWT and TMT with regard to the measures of absolute or relative interference. The patients had lower score on the backward Digit Span. Patients with cerebellar pathology may exhibit some impairment within problem solving and working memory. Their worse performance on the SCWT and TMT could, in turn, stem from their poor motor–somatosensory control, and not necessarily executive deficits. Our results thus support the hypothesis of the cerebellum’s mediating role in the regulation of the activity of the superordinate cognitive control network in the brain. (JINS, 2016, 22, 47–57)

scholarly journals Self-Reported Sleep and Executive Function in Early Primary School Children

2021 ◽  
Vol 12 ◽  
Author(s):  
Yulu Chen ◽  
Yiji Wang ◽  
Si Wang ◽  
Ming Zhang ◽  
Nan Wu
Keyword(s):  
Working Memory ◽  
Executive Function ◽  
Inhibitory Control ◽  
Cognitive Flexibility ◽  
Digit Span ◽  
Wisconsin Card Sorting Test ◽  
The Other ◽  
Self Report ◽  
Primary School Children ◽  
Card Sorting

The study investigated the associations between children’s self-reported habitual sleep disturbance and multidimensional executive function (EF). Two hundred and four 7–9-year-old typically developing children completed the Sleep Self-Report and finished the Red-Blue Test, Wisconsin Card Sorting Test, and Backward Digit Span Test, indexing different EF components including inhibitory control, cognitive flexibility, and working memory. Results revealed that all the three EF components were significantly correlated with sleep. However, cognitive flexibility was no longer significantly related to sleep when the other EF components – inhibitory control and working memory – were controlled for. Meanwhile, inhibitory control, as well as working memory, was still significantly related to sleep after controlling for the other EF components. Results suggest that children’s self-reported sleep might be associated directly with inhibitory control and working memory, but indirectly with cognitive flexibility.

scholarly journals Clinical and neuropsychological assessment of executive function in a sample of children and adolescents with idiopathic epilepsy

2014 ◽  
Vol 72 (12) ◽  
pp. 954-959 ◽  
Author(s):  
Andrea Bandeira de Lima ◽  
Fernanda Moreira ◽  
Marleide da Mota Gomes ◽  
Heber Maia-Filho
Keyword(s):  
Academic Performance ◽  
Executive Function ◽  
Executive Functions ◽  
Children And Adolescents ◽  
Clinical Data ◽  
Wisconsin Card Sorting Test ◽  
Idiopathic Epilepsy ◽  
Control Group ◽  
Seizure Type ◽  
Card Sorting

Objective To compare the executive functions of children and adolescents with idiopathic epilepsy with a control group and to correlate with clinical data, intelligence and academic performance. Method Cross-sectional, descriptive and analytical study. Thirty-one cases and thirty-five controls were evaluated by the WCST (Wisconsin Card Sorting Test).The results were compared with clinical data (seizure type and frequency, disease duration and number of antiepileptic drugs used), IQ (WISC-III) and academic performance (APT). Results Patients with epilepsy had poorer executive function scores. There was no positive linear correlation between test scores and epilepsy variables. There was a positive association between academic performance and some executive function results. Conclusion Children with well controlled idiopathic epilepsy may show deficits in executive functions in spite of clinical variables. Those deficits may influence academic performance.

A reduced-complexity model of fluvial inundation with a sub-grid representation of floodplain topography evaluated for England, United Kingdom

2021 ◽  
Author(s):  
Simon Dadson ◽  
Eleanor Blyth ◽  
Douglas Clark ◽  
Helen Davies ◽  
Richard Ellis ◽  
...  
Keyword(s):  
False Alarm ◽  
False Alarm Rate ◽  
Horizontal Resolution ◽  
Model Complexity ◽  
Exceedance Probability ◽  
Computational Techniques ◽  
Flood Inundation ◽  
Large Area ◽  
Simplified Approach ◽  
Hit Rate

<p>Timely predictions of fluvial flooding are important for national and regional planning and real-time flood response. Several new computational techniques have emerged in the past decade for making rapid fluvial flood inundation predictions at time and space scales relevant to early warning, although their efficient use is often constrained by the trade-off between model complexity, topographic fidelity and scale. Here we apply a simplified approach to large-area fluvial flood inundation modelling which combines a solution to the inertial form of the shallow water equations at 1 km horizontal resolution, with two alternative, simplified representations of sub-grid floodplain topography. One of these uses a fitted sub-grid probability distribution, the other a quantile-based representation of the floodplain. We evaluate the model’s steady-state performance when used with flood depth estimates corresponding to the 0.01 Annual Exceedance Probability (AEP; ‘100-year’) flood and compare the results with published benchmark data for England. The quantile-based method accurately predicts flood inundation in 86% of locations, with a domain-wide hit rate of 95% and false alarm rate of 10%. These performance measures compare with a hit rate of 71%, and false alarm rate of 9% for the simpler, distribution-based method. We suggest that these approaches are suitable for rapid, wide-area flood forecasting and climate change impact assessment.</p>

scholarly journals Measures of sensitivity based on a single hit rate and false alarm rate: The accuracy, precision, and robustness of′,A z, andA’

2006 ◽  
Vol 68 (4) ◽  
pp. 643-654 ◽  
Author(s):  
Michael F. Verde ◽  
Neil A. Macmillan ◽  
Caren M. Rotello
Keyword(s):  
False Alarm ◽  
False Alarm Rate ◽  
Hit Rate

scholarly journals Effects of High Intensity Interval Training on Executive Function in Children Aged 8–12 Years

2019 ◽  
Vol 16 (21) ◽  
pp. 4127 ◽  
Author(s):  
Nobuaki Tottori ◽  
Noriteru Morita ◽  
Kenji Ueta ◽  
Satoshi Fujita
Keyword(s):  
Executive Function ◽  
Physical Fitness ◽  
High Intensity ◽  
Digit Span ◽  
Interval Training ◽  
Control Group ◽  
High Intensity Interval Training ◽  
Tower Of Hanoi ◽  
Positive Effects ◽  
High Intensity Interval

This study investigated the effects of a high intensity interval training (HIIT) program on both physical fitness and executive functions in children. Fifty-six children aged 8–12 years participated in this study, and were divided into a HIIT group and a control group. The HIIT group performed three sessions of the 8- to 10-min HIIT program per week for 4 weeks. Before and after the intervention, 20-m shuttle runs, sit-ups, and standing long jumps were assessed as test of physical fitness. In addition, the executive function was assessed using the digit span forward (DSF) test, digit span backward (DSB) test, and Tower of Hanoi test. Only the HIIT group experienced significant improvement when completing the 20-m shuttle run (p = 0.042) and sit-ups (p < 0.001). Regarding executive function, the number of correct answers in DSB test significantly increased only in the HIIT group (p = 0.003). However, the standing long jump, DSF, and the Tower of Hanoi test performance did not change after intervention. The findings of the present study suggest that HIIT has positive effects on a core executive function such as working memory in addition to components of the physical fitness such as cardiorespiratory endurance and muscular endurance.

scholarly journals Attention-deficit/hyperactivity disorder: the impact of methylphenidate on working memory, inhibition capacity and mental flexibility

2017 ◽  
Vol 75 (4) ◽  
pp. 204-208 ◽  
Author(s):  
Cristiana Bolfer ◽  
Sandra Pasquali Pacheco ◽  
Miriam Harumi Tsunemi ◽  
Walter Souza Carreira ◽  
Beatriz Borba Casella ◽  
...  
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Working Memory ◽  
Attention Deficit ◽  
Digit Span ◽  
Control Group ◽  
Hyperactivity Disorder ◽  
Mental Flexibility ◽  
Adhd Children ◽  
Memory Inhibition ◽  
The Impact

ABSTRACT Objective To compare children with attention-deficit/hyperactivity disorder (ADHD), before and after the use of methylphenidate, and a control group, using tests of working memory, inhibition capacity and mental flexibility. Methods Neuropsychological tests were administrated to 53 boys, 9–12 years old: the WISC-III digit span backward, and arithmetic; Stroop Color; and Trail Making Tests. The case group included 23 boys with ADHD, who were combined type, treatment-naive, and with normal intelligence without comorbidities. The control group (n = 30) were age and gender matched. After three months on methylphenidate, the ADHD children were retested. The control group was also retested after three months. Results Before treatment, ADHD children had lower scores than the control group on the tests (p ≤ 0.001) and after methylphenidate had fewer test errors than before (p ≤ 0.001) Conclusion Methylphenidate treatment improves the working memory, inhibitory control and mental flexibility of ADHD boys.

scholarly journals Effect of cortisol levels on working memory performance in elderly subjects with Alzheimer's disease

2008 ◽  
Vol 66 (3b) ◽  
pp. 619-624 ◽  
Author(s):  
Juliana Nery de Souza-Talarico ◽  
Paulo Caramelli ◽  
Ricardo Nitrini ◽  
Eliane Corrêa Chaves
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Working Memory ◽  
Digit Span ◽  
Memory Performance ◽  
Elderly Subjects ◽  
Control Group ◽  
Acute Administration ◽  
Healthy Elderly ◽  
Cortisol Levels

BACKGROUND: Subjects with Alzheimer's disease (AD) have elevated cortisol levels as a result of hypothalamic-pituitary-adrenal (HPA) axis dysfunction. Acute administration of hydrocortisone has been associated with working memory (WM) performance in young adults. OBJECTIVE: To investigate whether cortisol levels are associated with WM performance in subjects with AD. METHOD: Eighty subjects were included, comprising 40 patients with mild AD and 40 healthy elderly controls. WM was assessed using the Digit Span Backward test (DSB). Saliva samples were collected to determine cortisol levels. RESULTS: AD subjects had poorer performance on the DSB than controls (p=0.002) and also presented higher levels of cortisol than control group (p=0.04). No significant correlation was observed between the DSB and cortisol levels in both groups (r= -0.29). CONCLUSION: In this study, elevated cortisol levels were not associated with poorer WM performance in patients with AD or in healthy elderly subjects.

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