This book constitutes the proceedings of the 7th InternationalConference on Modeling Decisions for Artificial Intelligence, MDAI 2010,held in Perpignan, France, in October 2010. The 25 papers presented were carefully reviewed and selected from 43submissions. The volume also contains extended abstracts of the threeinvited papers. The topics covered are aggregation operators anddecision making; clustering and similarity; computational intelligence;and data privacy.