In order to test the effect of discourse organization on reading comprehension, two expository texts having an SPSE (situation- problem- solution- evaluation) pattern were adminestered to a group of 30 undergraduate EFL students from Shahid Chamran University of Ahwaz who had been screened from among 100 students. These students had scored 60 and over from a language proficiency test having 75 items. The results of the study confirmed that the subjects had relatively more difficulty in recalling the evaluation and the solution sections, and in particular the details of \\\\\\\\\\\\\\\'solution\\\\\\\\\\\\\\\', than other sections of the expository texts. It is concluded that in addition to language proficiency, other factors such as voice and cognition which contribute to the organization of text and hence to the comprehensibility of it are essential.

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