Addressing the problem of inefficient collection and analysis of questionnaire data, this book proposes a methodology that uses R software. The author takes a practical approach to the subject, presenting principles first followed by detailed examples of their application to real data. He discusses principles of good questionnaire design, data management, capture, and manipulation and covers descriptive statistics, scoring, reliability, and missing data. The book focuses on R packages that are readily available and integrates discussion of their implementation and code throughout. All the data sets and R code packages are provided on a website.