Though interaction designers critique interfaces as a regular part of their research and practice, the field of HCI lacks a proper discipline of interaction criticism. By interaction criticism we mean rigorous, evidence-based interpretive analysis that explicates relationships among elements of an interface and the meanings, affects, moods, and intuitions they produce in the people that interact with them; the immediate goal of this analysis is the generation of innovative design insights. We summarize existing work offering promising directions in interaction criticism to build a case for a proper discipline. We then propose a framework for the discipline, relating each of its parts to recent HCI research. Keywords Interaction, criticism, aesthetics, design, theory ACM Classification Keywords H5.m. Information interfaces and presentation (e.g., HCI): Miscellaneous.