Questionnaire Analysis for Epidemiology and One Health Research R package EpiQuestionR version 0.1.1 Provides tools for the analysis of questionnaire and survey data in epidemiological and One Health research. The package supports data preparation, reliability assessment, exploratory factor analysis, Kaiser-Meyer-Olkin assessment, parallel analysis, visualization, reporting, and export of results using a consistent analysis workflow. The methods are based on established approaches to psychometric and multivariate analysis; see Kaiser (1974) <doi:10.1007/BF02291575>, Horn (1965) <doi:10.1007/BF02289447>, and Tabachnick and Fidell (2019, ISBN:9780134790541). Software Depends: R (>= 4.3.0) Imports: ggplot2, Matrix, graphics, lavaan, psych, stats, generics, withr, tibble Suggests: broom, broom.helpers, car, corrplot, covr, dplyr, DT, flextable, forcats, gt, gtsummary, haven, janitor, knitr, leaflet, ltm, MASS, mirt, MBESS, nnet, officer, plotly, purrr, readr, readxl, rlang, rmarkdown, semPlot, sf, shiny, shinydashboard, spdep, spelling, stringr, testthat (>= 3.0.0), tidyr, tmap, e1071, jsonlite, openxlsx, reshape2, scales, yaml Vinodh Kumar Obli Rajendran <vinodhkumar.rajendran@gmail.com> Comprehensive R Archive Network (CRAN) Vinodh Kumar Obli Rajendran [aut, cre] (ORCID: <https://orcid.org/0000-0002-7232-4122>), Keerthi Aaradhana [aut] MIT + file LICENSE (https://CRAN.R-project.org/package=EpiQuestionR/LICENSE) 2026-09-10 application/tgz https://CRAN.R-project.org/package=EpiQuestionR doi:10.32614/CRAN.package.EpiQuestionR en-US