Evaluation of IPAQ questionnaire by FCA
Vladimı́r Sklenář, Jiří Zacpal, Erik Sigmund · Concept Lattices and their Applications · 2005
This paper presents using of Formal Concept Analysis (FCA) in evaluation of IPAQ questionnaire. IPAQ is global epidemiological ques- tionnaire physical activity data. It tries to catch state of physical activity (inactivity) in representative file of population. The goal of authors was find dependencies between demographic data (age, gender, education, occupation, ...) and degree of physical activity. We tried to obtain these dependencies from intents of concept lattice created on the base of ques- tionnaire. Because the whole concept lattice was very large and contained number of concepts not interesting for expert that evaluated data from questionnaire, we used binary relations to constrain it. Primarily, we focused on equivalence relations.