This paper presents and illustrates a framework for synthesis of research and theory on human characteristics, and relates that framework to the concerns of individuals working in the visual literacy area. The framework presented casts learner characteristics into four general types, derived from two primary dimensions: stability/change and likeness/difference. The four types of learner characteristics described are (1) changing likenesses, (2) stable likenesses, (3) changing differences, and (4) stable differences. Each learner characteristic type is discussed with regard to its significance to instructional design and visual literacy. The paper concludes with the suggestion that an attempt to achieve thoughtful synthesis of all types of relevant learner characteristics would make possible the development of successful visual literacy programs. A 29-item list of references is attached. (Author/JEG)