This document presents a questionnaire designed to investigate the impact of electronic word-of-mouth (eWOM) on the purchasing decision-making process of individuals in Hong Kong, specifically in relation to scuba diving services. The questionnaire explores various aspects, including the reliability and trustworthiness of eWOM, the influence of social media platforms, the impact of online customer reviews, and the roles of gender, age, and branding in shaping consumer choices. It also delves into whether consumers are sometimes misled by eWOM, which sources (social media, blogs, etc.) are most influential, and whether eWOM provides sufficient information for consumers to judge service providers or if further investigation is needed. The questionnaire aims to provide insights into how eWOM affects customer behavior in the scuba diving market in Hong Kong.