Questionnaire data are only as strong as the measurement decisions behind them. This online Instats seminar with Bert Weijters helps PhD students and professional researchers build a coherent workflow for questionnaire-based research, from defining latent constructs and developing or adapting scales to understanding respondent behavior and evaluating measures with CFA and SEM in R using lavaan. Participants will learn how item wording, response formats, translation, shortening, careless responding, response styles, method effects, ordinal indicators, reversed items, reliability, validity, and measurement invariance can shape substantive conclusions. Designed for researchers in business, management, marketing, organizational behavior, psychology, sociology, strategy, and related fields, the workshop offers practical tools for producing more defensible instruments, stronger measurement arguments, and more publication-ready empirical studies. The seminar is available via Zoom with recordings, materials, and a monitored Q&A forum available for 30 days, and participants receive an official Instats certificate of completion. #Business #Management #Marketing #OrganizationalBehavior #Psychology #SocialSciences #Sociology #Strategy #SurveyDesign #DataScience #Statistics #lavaan #R #RStudio #Research #ResearchTraining #Instats