An Investigation of the Relationship between Reading Comprehension, Vocabulary Knowledge, and English Language Proficiency Level of Saudi EFL Learners

The present study is an attempt to explore the relationship between breadth (the number of words known) and depth vocabulary knowledge richness word knowledge) knowledge), reading comprehension EFL learners in English as a foreign language (EFL) context. Furthermore, it tries find effect proficiency level on lexical Saudi learners. participants were seventy-five intermediate advanced majoring Translation at Qassim University KSA. had been checked through OPT by department advance. To collect relevant data, two tests measuring administered all participants. They also received test which they asked read passages answer some multiple-choice questions. findings obtained from analysis data indicated that there significant advanced/intermediate learner’s performance totally. results further revealed both dimensions are positively correlated, is, those who large size deeper words, too. showed have learners’ knowledge. These confirm importance value developing students‟ classrooms.