Insensitiveness of respondents to the scope of goods to be valued has been a subject of strong concern in the environmental economic literature based on stated preference. Different types of scope tests have been proposed to assess whether elicited values are sensitive to changes in quantity or quality of environmental goods, but empirical applications still report mixed evidence. Here we propose to test the presence of a scope effect using a choice experiment approach in the context of coastal erosion management in Vietnam. We use a split-sample design to assess how respondents value different segments of a beach presenting different characteristics. We investigate if households' preferences for the same coastal erosion management policy vary across beach segments which differ in particular in terms of size and speed of erosion. Our choice experiment has been conducted in the city of Hoian located along the coastline in the central part of Vietnam. Hoian has been listed as a UNESCO World Heritage site since 1999 and its main beach (Cua Dai beach) is considered as one of the most beautiful beaches in Vietnam. In recent years, erosion has occurred severely on Cua Dai Beach to an extent that sandy beach is no longer presented in some areas and shore adjacent buildings are threatened. Preliminary results suggest that respondent's preferences for coastal erosion management policy differ across beach segment. However, their preferences are sensitive with length of beach, but indifferent with speed of erosion. This result may be interpreted has some form of sensitiveness of respondents to the scope in the context of coastal erosion in a developing country.