By Francesco Bartolucci, Silvia Bacci, Michela Gnaldi
Statistical research of Questionnaires: A Unified strategy in line with R and Stata provides particular statistical equipment for interpreting info accumulated by way of questionnaires. The booklet takes an utilized method of trying out and dimension initiatives, mirroring the growing to be use of statistical equipment and software program in schooling, psychology, sociology, and different fields. it's appropriate for graduate scholars in utilized data and psychometrics and practitioners in schooling, overall healthiness, and marketing.
The booklet covers the rules of classical try conception (CTT), try out reliability, validity, and scaling in addition to merchandise reaction idea (IRT) basics and IRT for dichotomous and polytomous goods. The authors discover the newest IRT extensions, comparable to IRT types with covariates, multidimensional IRT types, IRT versions for hierarchical and longitudinal information, and latent category IRT types. additionally they describe estimation tools and diagnostics, together with graphical diagnostic instruments, parametric and nonparametric checks, and differential merchandise functioning.
Stata and R software program codes are incorporated for every procedure. to reinforce comprehension, the e-book employs genuine datasets within the examples and illustrates the software program outputs intimately. The datasets can be found at the authors’ net page.
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