scholarly journals Identification of Stable Asymptotic Performance on Computer-Based Cognitive Tests

1998 ◽  
Vol 42 (11) ◽  
pp. 826-830 ◽  
Author(s):  
Byeong-Cheol Hwang ◽  
Robert E. Schlegel ◽  
Randa L. Shehab
Keyword(s):  
Statistical Analysis ◽  
Cognitive Performance ◽  
Graphical Analysis ◽  
Performance Measure ◽  
Learning Curves ◽  
Cognitive Tests ◽  
Performance Tasks ◽  
Computer Based ◽  
Analysis System ◽  
The Stability

Examining whether human cognitive performance is affected by environmental conditions requires stable performance measures prior to stressor exposure. This study evaluated the stability and reliability of six computer-based cognitive performance tasks. A Microsoft Excel Visual Basic for Applications (VBA) macro program, the Stability and Reliability Analysis System (SRAS), was developed to evaluate performance of the cognitive tests using three approaches for identifying stability: Graphical Analysis, Learning Curve Fitting, and Statistical Analysis. The results of the comparative evaluation indicated that the SRAS macro program was effective in determining differential stability for the various tasks and measures. Across all tasks, the use of a compound graphical analysis approach was better than a single graph method in terms of providing a more reliable estimation of task stability. Learning curves were fit to each performance measure. For most tasks, the best-fit models were power and logarithmic models. The statistical analysis methods provided conservative estimates of task stability.

scholarly journals Multimodal measurement approach to identify individuals with mild cognitive impairment: study protocol for a cross-sectional trial

BMJ Open ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. e046879
Author(s):  
Bernhard Grässler ◽  
Fabian Herold ◽  
Milos Dordevic ◽  
Tariq Ali Gujar ◽  
Sabine Darius ◽  
...  
Keyword(s):  
Cognitive Impairment ◽  
Mild Cognitive Impairment ◽  
Statistical Analysis ◽  
Cognitive Decline ◽  
Cognitive Performance ◽  
Classification Accuracy ◽  
Multimodal Approach ◽  
Cross Sectional ◽  
Age Related ◽  
Age Related Cognitive Decline

IntroductionThe diagnosis of mild cognitive impairment (MCI), that is, the transitory phase between normal age-related cognitive decline and dementia, remains a challenging task. It was observed that a multimodal approach (simultaneous analysis of several complementary modalities) can improve the classification accuracy. We will combine three noninvasive measurement modalities: functional near-infrared spectroscopy (fNIRS), electroencephalography and heart rate variability via ECG. Our aim is to explore neurophysiological correlates of cognitive performance and whether our multimodal approach can aid in early identification of individuals with MCI.Methods and analysisThis study will be a cross-sectional with patients with MCI and healthy controls (HC). The neurophysiological signals will be measured during rest and while performing cognitive tasks: (1) Stroop, (2) N-back and (3) verbal fluency test (VFT). Main aims of statistical analysis are to (1) determine the differences in neurophysiological responses of HC and MCI, (2) investigate relationships between measures of cognitive performance and neurophysiological responses and (3) investigate whether the classification accuracy can be improved by using our multimodal approach. To meet these targets, statistical analysis will include machine learning approaches.This is, to the best of our knowledge, the first study that applies simultaneously these three modalities in MCI and HC. We hypothesise that the multimodal approach improves the classification accuracy between HC and MCI as compared with a unimodal approach. If our hypothesis is verified, this study paves the way for additional research on multimodal approaches for dementia research and fosters the exploration of new biomarkers for an early detection of nonphysiological age-related cognitive decline.Ethics and disseminationEthics approval was obtained from the local Ethics Committee (reference: 83/19). Data will be shared with the scientific community no more than 1 year following completion of study and data assembly.Trial registration numberClinicalTrials.gov, NCT04427436, registered on 10 June 2020, https://clinicaltrials.gov/ct2/show/study/NCT04427436.

Applied plant science experimental design and statistical analysis using the SAS® OnDemand for Academics

2021 ◽  
Keyword(s):  
Statistical Analysis ◽  
Agricultural Production ◽  
Science Research ◽  
Plant Science ◽  
Data Sets ◽  
Statistical Analysis System ◽  
Key Topics ◽  
Analysis System ◽  
User Friendly ◽  
Enormous Number

Abstract The correct design, analysis and interpretation of plant science experiments is imperative for continued improvements in agricultural production worldwide. The enormous number of design and analysis options available for correctly implementing, analyzing and interpreting research can be overwhelming. Statistical Analysis System (SAS®) is the most widely used statistical software in the world and SAS® OnDemand for Academics is now freely available for academic insttutions. This is a user-friendly guide to statistics using SAS® OnDemand for Academics, ideal for facilitating the design and analysis of plant science experiments. It presents the most frequently used statistical methods in an easy-to-follow and non-intimidating fashion, and teaches the appropriate use of SAS® within the context of plant science research. This book contains 21 chapters that covers experimental designs and data analysis protocols; is presented as a how-to guide with many examples; includes freely downloadable data sets; and examines key topics such as ANOVA, mean separation, non-parametric analysis and linear regression.

The threat of outflow of individual deposits in systemically important banks of the Russian Federation: A retrospective analysis and regulatory outlook

2021 ◽  
Vol 27 (1) ◽  
pp. 4-21
Author(s):  
Yuliya S. EVLAKHOVA
Keyword(s):  
Statistical Analysis ◽  
Retrospective Analysis ◽  
Russian Federation ◽  
Too Big To Fail ◽  
Bank Run ◽  
Business Operations ◽  
The Russian Federation ◽  
The Stability ◽  
High Threat ◽  
Systemically Important Banks

Subject. The article focuses on the dynamics of individual deposits in the Russian systemically important banks as a factor of the stability of available resources. Objectives. I assess the threat of individual deposits outflowing from the Russian too-big-to-fail banks within 2015–2019. I correspondingly outline recommendations for mitigating the threat in the future. Methods. The study is based on methods of logic, comparative and statistical analysis. I devised and applied our own algorithm for classifying too-big-to-fail banks by threat of individual deposit outflow and its level. Results. Systemically important banks were found to have not been exposed to the high threat of bank run within 2015–2019. Three fundamental credit institutions were constantly exposed to the threat of individual deposit outflow. One of eleven systemic banks continuously demonstrated the low threat of individual deposit outflow. The rest of the banks were migrating among the low-threat and high-threat classes. Conclusions and Relevance. The Russian systemically important banks can refer to our findings to articulate their deposit policy, set and use digital accounts of retail customers. The Bank of Russian can rely on the analysis of the threat of individual deposit outflow and other data on financial and business operations of the banks and its sustainability as part of bank oversight procedures.

Development and Application of Graphics Displays for a Mini-Computer Based Vibration Analysis System

1992 ◽  
Author(s):  
Bill Trevillion
Keyword(s):  
Three Dimensional ◽  
Large Data ◽  
Electric Utility ◽  
Chemical Processing ◽  
Acoustic Data ◽  
Interactive Display ◽  
Computer Based ◽  
Data Files ◽  
Vibration Problems ◽  
Analysis System

Abstract Radian Corporation has developed extensive data display capabilities to analyze vibration and acoustic data from structures and rotating equipment. The Machinery Interactive Display and Analysis System (MIDAS) displays data collected through the acquisition functions of MIDAS. The graphics capabilities include displaying spectra in three-dimensional waterfall and in X-Y formats. Both types of plots can relate vibrations to time, equipment speed, or process parameters. Using menu-driven parameter selection, data can be displayed in formats that are the most useful for analysis. The system runs on a popular mini-computer, and it can be used with a great variety of graphics terminals, workstations, and printer/plotters. The software was designed and written for interactive display and plotting. Automatic plotting of large data files is facilitated by a batch plotting mode. The user can define display formats for the analysis of noise and vibration problems in the electric utility, chemical processing, paper, and automotive industries. This paper describes the history and development of graphics capabilities of the MIDAS system. The system, as illustrated in the examples, has proven efficient and economical for displaying large quantities of data.

scholarly journals Qualidade de vida em sujeitos respiradores orais e oronasais

Revista CEFAC ◽  
2012 ◽  
Vol 15 (1) ◽  
pp. 105-110 ◽  
Author(s):  
Mirian Hideko Nagae ◽  
Marcelo Corrêa Alves ◽  
Renato Lyuti Kinoshita ◽  
Zélia Z L de Camargo Bittencourt ◽  
Heloisa Gagliardo
Keyword(s):  
Statistical Analysis ◽  
Statistical Analysis System ◽  
Analysis System

OBJETIVO: investigar a qualidade de vida de sujeitos com respiração oral ou oronasal. MÉTODO: compuseram a amostra 49 voluntários, distribuídos em dois grupos: grupo de respiradores orais com 24 sujeitos e grupo de respiradores oronasais com 25 sujeitos, com faixa etária ente 18 e 38 anos de idade, de ambos os sexos. O protocolo utilizado foi o WHOQOL-BREF (versão em português) e o registro e análise dos dados foi realizado pelo sistema Statistical Analysis System. RESULTADOS: os resultados obtidos foram submetidos aos testes de qui-quadrado de Mantel-Haenszele análise de variância. A qualidade de vida dos respiradores mistos se revelou inferior nos domínios ambiental, físico e psicológico em relação aos respiradores orais. CONCLUSÃO: com a detecção das diferenças obtidas, o estudo chama a atenção para a necessidade de aprofundar investigações sobre o perfil dos respiradores oronasais e sua relevância. Para que condutas como desconsiderar o grupo de respiradores oronasais ou agrupá-los como respiradores orais não sejam adotadas de forma inadequada.

Evaluation of the Effect of Fault on the Stability of Underground Workings of Coal Mine through DEM and Statistical Analysis

2018 ◽  
Vol 92 (6) ◽  
pp. 732-742 ◽  
Author(s):  
Arka Jyoti Das ◽  
Prabhat Kumar Mandal ◽  
Satya Prakash Sahu ◽  
Angad Kushwaha ◽  
Rana Bhattacharjee ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Coal Mine ◽  
Underground Workings ◽  
The Stability

scholarly journals The impact of cognitive performance on quality of life in individuals with Parkinson's disease

2016 ◽  
Vol 10 (4) ◽  
pp. 303-309 ◽  
Author(s):  
Maira Rozenfeld Olchik ◽  
Annelise Ayres ◽  
Marcieli Ghisi ◽  
Artur Francisco Schumacher Schuh ◽  
Carlos Roberto Mello Rieder
Keyword(s):  
Quality Of Life ◽  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Cognitive Performance ◽  
Poor Performance ◽  
Cognitive Testing ◽  
Cognitive Tests ◽  
Patient Consent ◽  
The Impact

ABSTRACT Background: Evidence points to the occurrence of cognitive impairment in all stages of PD, constituting a frequent and debilitating symptom, due to high impact on quality of life and mortality of patients. Objective: To correlate cognitive performance with quality of life in PD. Methods: The sample was drawn from a Movement Disorders Clinic of a reference hospital in Porto Alegre. Inclusion criteria were: PD diagnosis, according to the United Kingdom Parkinson's Disease Society Brain Bank criteria for idiopathic PD (Hughes et al. 1992) and patient consent to participate. Patients with other neurological pathologies and those submitted to deep brain stimulation were excluded. The evaluation consisted of a cognitive testing battery (composed of eight tests for assessing cognitive performance), and a questionnaire on quality of life (PDQ-39) and depression (BDI). Results: The sample comprised 85 individuals with PD, with a mean age of 62.9 years (±10.7), mean disease duration of 10.4 years (±5.7), and mean educational level of four years (±4.3). There was a significant relationship between total score on the PDQ and all cognitive tests, showing that poor cognitive performance was correlated with poor quality of life. Moreover, a significant correlation was observed between cognitive tests and depression, H&Y, education level, and age. Conclusion: It may be concluded that the individuals with PD in this sample showed a correlation between poorer quality of life and worse cognitive performance. Poor performance was also correlated with more advanced stage, older age, low level of education and depression.

scholarly journals Intervalo de partos em rebanho Nelore na Amazônia Oriental

2000 ◽  
Vol 29 (5) ◽  
pp. 1327-1331 ◽  
Author(s):  
Francisco Aloísio Cavalcante ◽  
Raimundo Martins Filho ◽  
Claudio Cabral Campello ◽  
Raimundo Nonato Braga Lobo ◽  
Gabrimar Araujo Martins
Keyword(s):  
Statistical Analysis ◽  
Statistical Analysis System ◽  
Analysis System

O estudo foi conduzido para avaliar intervalo de partos (IDP) na raça Nelore, utilizando 578 dados de intervalo de partos de animais criados em regime de pasto, no período de 1988 a 1996. Para as análises estatísticas dos dados, foi usado o Programa SAS (Statistical Analysis System). Foram incluídos no modelo o efeito aleatório do pai da vaca, os efeitos fixos de grupo genético da cria anterior, de ano do parto anterior e do mês do parto anterior e as interações entre grupo genético anterior e mês do parto anterior, grupo genético anterior e ano do parto anterior, além da idade da vaca ao parto como covariável. O IDP foi influenciado pelo pai da vaca e pelo ano do parto anterior. A média estimada por quadrado mínimo e seu respectivo erro-padrão (EP) e coeficiente de variação (CV) foram 431,83 ± 142,76 dias e 33,06%, respectivamente. O intervalo de partos, além do efeito de pai, sofreu influência de ambiente. O desempenho reprodutivo do rebanho estudado, para as condições de clima tropical, pode ser considerado como satisfatório, estando de acordo com os parâmetros obtidos por outros autores em diferentes regiões.

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