This study is addressed to investigate the relationship between text coverage and reading comprehension by the EFL readers. Three reading texts with different text coverages by using non-words were given to three groups of students. They were told to guess the non-words and to answer the reading comprehension questions. The results showed that there was no particular relationship found between text coverage and reading comprehension scores. It was also found that the probability of success in guessing unknown words was not dependent on the text coverage. These results probably suggest that even though vocabulary plays an important role in reading a text, other factors probably exit in reading comprehension and guessing unknown words.
