关键词：众包；互联网技术；社交网络
摘 要：This dissertation explores the application of computer science methodologies, techniques, and technologies to citizen science. Citizen science can be broadly de ned as scienti c research performed in part or in whole by volunteers who are not professional scientists. Such projects are increasingly making use of mobile and Internet technologies and social networking systems to collect or categorize data, and to coordinate efforts with other participants. The dissertation focuses on observations and experiences from the design, deployment, and testing of a citizen science project, CreekWatch. CreekWatch is a collaboration between an HCI research group and a government agency.