“…A survey instrument was developed using distinct and iterative steps (Streiner, Norman, & Cairney, 2015). Items from existing surveys on placebo were extracted from the available literature (Babel, 2013;Baghcheghi & Koohestani, 2011;Harris, Campbell, & Raz, 2015;Hassan, Fauzi, & Hasan, 2011;Howick et al, 2013;Hróbjartsson & Norup, 2003;Nitzan & Lichtenberg, 2004;Shah, Panchal, Vyas, & Patel, 2009;Sherman & Hickner, 2008;Tilburt et al, 2008;Unver et al, 2013). Differently, given that no survey on nocebos has been performed to date, it was not possible to base the questionnaire development on previous literature.…”