{"title":"Gerhard Tutz","description":null,"products":[{"product_id":"short-guide-to-item-response-theory-models-book-gerhard-tutz-9783031872709","title":"A Short Guide to Item Response Theory Models","description":"This book presents foundational concepts, essential principles, and practical applications of Item Response Theory (IRT). It provides a structured survey of diverse models that have been put forth, emphasizing both their differences and commonalities.   The main focus is on modern latent trait theory models which provide measurement tools that clearly separate between person abilities and item parameters. The topics covered include the binary Rasch model, its extensions and alternative binary models, ordinal models and their extensions that account for response styles, the thresholds model, classical test theory, response models for count data, differential item functioning, and explanatory item response models. Tree-based item response models, typically not found in classical IRT textbooks, are also addressed.   Applications of the models are illustrated on several data sets from differing areas, showing how models can be fitted and compared. All examples have been computed using R. Code snippets are provided, and the full R code for most of the examples is available online.   The book is aimed at graduate students, applied statisticians, and researchers working in psychometrics, educators, and anyone curious about modeling strategies that enhance the precision and validity of their measurement tools. It serves as an introductory guide for beginners while also providing a resource for those seeking an overview of the plethora of available IRT models.","brand":"WoB","offers":[{"title":"- \/ - \/ -","offer_id":51670162702609,"sku":"","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"GB \/ NEW \/ GARDNERS","offer_id":51670163161361,"sku":"NGR9783031872709","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/3031872703.jpg?v=1753687808"},{"product_id":"die-analyse-kategorialer-daten-book-gerhard-tutz-9783486254051","title":"Die Analyse Kategorialer Daten","description":"Das Werk gibt eine Einf hrung in die Kategoriale Regression, die auch f r Anwender sehr gut geeignet ist. Neben wirtschaftswissenschaftlichen Beispielen, die zahlenm  ig dominieren, finden sich Beispiele aus Biometrie, der medizinischen Statistik, Psychologie und Demographie. Aus dem Inhalt: Einf hrung. Logistische Regression und Logit-Modell f r bin re abh ngige Gr  en. Sch tzung, Modellanpassung und Einflu gr  en. Multinominale Modelle f r ungeordnete Kategorien. Regression mit ordinaler abh ngiger Variable. Z hldaten und die Analyse von Kontingenztafeln: das loglineare Modell. Nonparametrische Regression I: Gl ttungsverfahren. Nonparametrische Regression II: Klassifikations- und Regressionsb ume. Kategoriale Prognose und Diskriminanzanalyse. Elemente der Sch tz- und Testtheorie. 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Zahlreiche neue Ergebnisse werden unter dem Gesichtspunkt der Praktikabilit t sowie der me theoretischen Fundierung vorgestellt.","brand":"WoB","offers":[{"title":"- \/ - \/ INTERNAL","offer_id":52429173588241,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":true},{"title":"GB \/ NEW \/ INGRAM","offer_id":52429174407441,"sku":"NLS9783540518136","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9783540518136.jpg?v=1759166236"},{"product_id":"regression-for-categorical-data-book-gerhard-tutz-9781107009653","title":"Regression for Categorical Data","description":"This book introduces basic and advanced concepts of categorical regression with a focus on the structuring constituents of regression, including regularization techniques to structure predictors. In addition to standard methods such as the logit and probit model and extensions to multivariate settings, the author presents more recent developments in flexible and high-dimensional regression, which allow weakening of assumptions on the structuring of the predictor and yield fits that are closer to the data. A generalized linear model is used as a unifying framework whenever possible in particular parametric models that are treated within this framework. Many topics not normally included in books on categorical data analysis are treated here, such as nonparametric regression; selection of predictors by regularized estimation procedures; ternative models like the hurdle model and zero-inflated regression models for count data; and non-standard tree-based ensemble methods. The book is accompanied by an R package that contains data sets and code for all the examples.","brand":"WoB","offers":[{"title":"GB \/ NEW \/ INGRAM","offer_id":52431163392273,"sku":"NLS9781107009653","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"US \/ VERY_GOOD \/ SBYB","offer_id":53403445166353,"sku":"CIN1107009650VG","price":0.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9781107009653.jpg?v=1759171713"},{"product_id":"modeling-discrete-time-to-event-data-book-gerhard-tutz-9783319281568","title":"Modeling Discrete Time-to-Event Data","description":"This book focuses on statistical methods for the analysis of discrete failure times. Failure time analysis is one of the most important fields in statistical research, with applications affecting a wide range of disciplines, in particular, demography, econometrics, epidemiology and clinical research. 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