“…In Abdel-Qader, Bazuin, Mousavinezhad, and Patrick (2003), overall satisfaction and quality of materials are the unique variables taken into account. More elaborated questionnaires considering new dimensions can be found in Chevalier, Craddock, Riley, and Trunk (2000), Avouris, Tselios, and Tatakis (2001) and Hurley and Lee (2005). But in all the cases, the data treatment is reduced to show frequency of user answers.…”