“…This line of research has been built on the investigation (mainly through semi-structured interviews and verbal selfreports) into the strategies used by subjects to solve reading comprehension items (Farr, Pritchard & Smitten, 1990;DeMauro, Merritty & Adams, 1994;Powers & Wilson, 1995;Rupp, Ferne & Choi, 2006). In addition, the attempt to predict item difficulty level has generated a large number of studies where the basic interest has been to identify cognitive and linguistic predictors (Drum, Calfee & Cook, 1981;Stahl & Jacobson, 1986;Davey, 1988;Kirsch & Mosenthal, 1990;Freedle & Kostin, 1991;Freedle & Kostin, 1992;Daneman & Hannon, 2001;Sheehan & Ginther, 2001;Gorin & Embretson, 2006;Ozuru, Rowe, O'Reilly & McNamara, 2008;Leroy, Helmreich & Cowie, 2010). These last studies have primarily used a quantitative approach, making use of traditional statistical techniques such as multiple regression and ANOVA; however, various studies can also be found where the LLTM is used to estimate the predictive power of certain characteristics of logical reasoning and reading comprehension items (Embretson & Wetzel, 1987;Sheehan & Mislevy, 1990;Gorin, 2005;Sonnleitner, 2008;Attoresi, Picón, Abal, Aguerri & Galibert, 2009;Gilbert, Picón, Lozzia, Aguerri & Attorresi, 2010;Poinstingl, 2009).…”