Results 11 to 20 of about 195 (132)
A comparative study of estimators in multilevel linear models [PDF]
PLoS ONE, 2021 Multilevel Models are widely used in organizational research, educational research, epidemiology, psychology, biology and medical fields. In this paper, we recommend the situations where Bootstrap procedures through Minimum Norm Quadratic Unbiased ...
Sabz Ali +3 more
doaj +3 more sources
Genetics in psychiatry: Methods, clinical applications and future perspectives [PDF]
Psychiatry and Clinical Neurosciences Reports, Volume 1, Issue 2, June 2022., 2022 Abstract Psychiatric disorders and related traits have a demonstrated genetic component, with heritability estimated by twin studies generally between 80% and 40%. Their pathogenesis is complex and multi‐determined: environmental factors interact with a polygenic architecture, making difficult the development of models able to stratify patients or ...
Chiara Fabbri
wiley +2 more sources
On non-negative estimation of variance components in mixed linear models [PDF]
Journal of Advanced Research, 2016 Alternative estimators have been derived for estimating the variance components according to Iterative Almost Unbiased Estimation (IAUE). As a result two modified IAUEs are introduced.
Heba A. El Leithy +2 more
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Estimating Chronological Age From the Electrical Activity of the Brain: How EEG‐Age Can Be Used as a Marker of General Brain Functioning [PDF]
Psychophysiology, Volume 62, Issue 3, March 2025.Impact Statement Our goal was to use the EEG power‐frequency spectrum to estimate ‘brain age’. Using multivariate methods to analyze the broad EEG spectrum (0.1–45 Hz), EEG‐age and chronological age were correlated strongly, and EEG‐age was a more accurate estimate and accounted for more variance in chronological age than well‐established Peak Alpha ...
Thomas M. James, Adrian P. Burgess
wiley +2 more sources
Fast heritability estimation based on MINQUE and batch training
Briefings in Bioinformatics, 2022 Abstract Heritability, the proportion of phenotypic variance explained by genome-wide single nucleotide polymorphisms (SNPs) in unrelated individuals, is an important measure of the genetic contribution to human diseases and plays a critical role in studying the genetic architecture of human diseases.
Qing Lu, Tong Wang, Xiaoran Tong
exaly +3 more sources
COMPARISON OF MINQUE AND SIMPLE ESTIMATOR OF THE ERROR VARIANCE IN THE GAUSS MARKOFF MODEL
Journal of Kufa for Mathematics and Computer, 2010 The problem of estimation of variance components occurs in many areas of research. This paper is devoted to study the comparison between Minimum Norm Quadratic Unbiased Estimator (MINQUE) and Ordinary Least Square Estimator (OLSE) of s 2 in the Gauss ...
Abdul-Hussein Saber AL-MOUEL
doaj +2 more sources
Asymptotic Behavior of Minque-Type Estimators of Variance Components
Annals of Statistics, 1976 The limiting distributions are obtained for two estimators of variance components: C. R. Rao's MINQUE, and an estimator produced by an iterative procedure, referred to as I-MINQUE. Limits are taken as the number of independent and identically distributed vector observations on the model assumed gets large.
exaly +4 more sources
THE ESTIMATION OF VARIANCE AND COVARIANCE COMPONENTS FOR GPS BASELINE NETWORK BY MINQUE METHOD
Geo-Spatial Information Science, 1998 This paper studies the estimation of variance and covariance components for GPS baseline network by MINQUE method. The fundamental rule for selecting variance-covariance model has been presented, and the alternative algorithm which simultaneouly estimates fixed variance components and scalled variance components of the distance, azimuth and geodetic ...
Liu Jingnan, Wang Xinzhou
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Comparison of REML and MINQUE for Estimated Variance Components and Predicted Random Effects
Open Journal of Statistics, 2016 Linear mixed model (LMM) approaches have been widely applied in many areas of research data analysis because they offer great flexibility for different data structures and linear model systems. In this study, emphasis is placed on comparing the properties of two LMM approaches: restricted maximum likelihood (REML) and minimum norm quadratic ...
Johnie Jenkins +2 more
exaly +3 more sources
Journal of Animal Breeding and Genetics, Volume 140, Issue 6, Page 624-637, November 2023., 2023 Abstract Non‐additive genetic effects are well known to play an important role in the phenotypic expression of complex traits, such as fertility and reproduction. In this study, a genome scan was performed using 41,640 single nucleotide polymorphism (SNP) markers to identify genomic regions associated with epistatic (additive‐by‐additive) effects in ...
Kristen Alves +3 more
wiley +1 more source