Based on Jon Eisenson’s previous editions, the EFA-4 has been completely revised to evaluate the cognitive, personality, and linguistic modifications that are associated with acquired aphasia. The EFA-4’s subtests help determine areas of strength and weakness for receptive and expressive functions as well as for the communication processes that underpin language use. EFA-4 tests visual, auditory and tactile recognition as well as auditory and reading comprehension of words, sentences, and paragraphs. Expressive and productive tasks include simple skills, automatic language, arithmetic computations, and language items that parallel those for receptive tasks. This edition incorporates aspects of the examinee’s social history, acknowledging the contemporary integration of social models of aphasia with attention to treatment planning that focuses on ICF guidelines: restoration of activities and participation in daily life.