Faithful Measures is a venture into the art and science of measuring religion in everyday life. This book evaluates new and existing measures of religion as well as unveils new methods for tapping into religious behaviors and beliefs. The sources for the new and revised measures will vary. Some will rely almost entirely on recent technology (e.g., smartphone apps, Google Ngrams, and Amazon buying networks), some will wed old designs with new technology (e.g., online surveys using experimental designs), and others will develop new measures from existing information (e.g., coding new measures from newly available sources). Each chapter explains how these new measures and methods offer new insights into understanding the complex topic of religion.