The main purpose of this study was to examine the relationship between EFL
learners' perceived reading strategies, vocabulary size, and reading comprehension. The reading an English text; (2) WSS used by high-proficiency level (HP) and low-
proficiency level (LP) students before and after training on WSS when encountering an
unknown word while reading; and (3) any differences between the four different data
gathering methods (ITA, PTA, IIN and LIN) with respect to the data collected and use of
WSS.