Vulnerable Older Consumers: New Persuasion Knowledge Achievement Measure Katalin Balázs*, Ágnes Bene** and István Hidegkuti* University of Debrecen, Hungary *Institute of Psychology, University of Debrecen **Faculty of Health, University of Debrecen This work was supported by the University of Debrecen (RH/751/2015). This is a preprint version of the paper: Balázs, K., Bene, Á. Hidegkuti, I. (2017). Vulnerable older consumers: New Persuasion Knowledge Achievement Measure. International Journal of Consumer Studies. doi: 10.1111/ijcs.12383.