Introduction
Perceived portion size norms, described as a typical perception of how much of a given food individuals choose to eat at a single eating occasion [Different types of perceived portion size norms have been identified in previous research [Various assessment tasks have been used to investigate the perceived portion size norm, including self-selected portion size tasks based on provided portion size options [To ensure the accuracy of outcome measures, assessment tools specifically designed to examine the perceived portion size norm are needed. A series of computer-based food images appears to be a promising alternative to using real foods in the estimation of perceived portion size norms due to a lower respondent burden and higher accessibility to a larger population [