The opportunities Item Response Theory (IRT) offers to health psychologists: Methods in Health Psychology Symposium IV Authors Alexandra Dima University of Amsterdam Chris Gibbons University of Manchester Mieke Kleppe Philips Research Eindhoven University of Technology Katarzyna Byrka University of Social Sciences and Humanities of Wroclaw Marijn de Bruin University of Aberdeen Marie Johnston University of Aberdeen Downloads PDF Issue Vol. 16 No. 6 (2014) Section Conference Reports