... drawings, and, finally by the version that used photographs. Readance and Moore [27], in a review of education research on the effect of adjunct pictures on reading comprehension, concludedthat ... improving health communication: A review of research on attention, comprehension, recall, and adherence Peter S. Houts a, *, Cecilia C. Doakb, Leonard G. Doakb, Matthew J. Loscalzoc a Pennsylvania ... to conductsuch research in clinical settings. Health educationresearchers should, therefore, include, in their evaluations of health education materials, questions on whether the materials...