Abstract
The purpose of this study was to provide initial anchor-based minimally clinically importance difference score (MID) estimates for the Aphasia Communication Outcome Measure (ACOM), a patient-reported measure of communicative functioning. Persons with aphasia who participated in one of three clinical trials of speech-language treatment (n = 63) or an intensive comprehensive aphasia treatment program (n = 87) were administered the ACOM before and after treatment along with one or more anchor measures used to identify those demonstrating minimal positive change. MID estimates ranged from three T-score points for the full ACOM to four-to-five points for the 12-item adaptive version.