Our understanding of the causes and consequences of violence depends on accurately defining and measuring the constructs we study. Although the methods used most often in violence research have led to a wealth of important findings, the field is ripe for both reflection and innovation. The purpose of this special issue is to highlight critical measurement issues in the study of violence and to describe innovative approaches that will move this research forward. In this Introduction to the special issue, we identify 3 challenges for the valid measurement of violence—defining constructs, accurately capturing responses in scoring, and diversifying measurement methods—and discuss how the 8 studies that constitute the issue address these challenges and identify promising directions for future work. (PsycINFO Database Record (c) 2014 APA, all rights reserved)