Reading comprehension in a foreign language (FL) is a complex process with many underlying cognitive
components. Many second language researchers have tried to explain reading comprehension in terms of taxon-
omies of subskills and processes. However, the nature of these components is not yet known. Previous research
using exploratory and con
fi
rmatory factor analysis has yielded contradictory results. The purpose of this study is
to investigate the underlying cognitive components and processes of FL reading comprehension using linear
logistic test model (LLTM; Fischer, 1973). For the purpose of the present study, the data of 400 applicants taking
an advanced high-stakes reading comprehension test were used. The cognitive processes underlying the test
were derived. The derived processes were reading for details, making inferences, reading for main idea, syntax,
and vocabulary. Linear logistic test model showed that making inferences is the hardest process to employ and
vocabulary the easiest. The implications for teaching and testing reading comprehension are discussed