The document provides methodology details for the 2018 Edelman Trust Barometer survey conducted in 28 countries. It describes the different populations surveyed, including the general online population, mass population, and informed public. Sample sizes and dates of fieldwork are given for each group. Margin of error details are also provided. The document then summarizes the methodology used for the Israel-specific survey, which had 500 respondents and was conducted in December 2017.