The goal of the STHENOS Workshop on Affective Computing for Biological Activity Recognition in Assistive Environments is to present the research within the framework of the STHENOS project (www.sthenos.gr), which aims at the development of methodologies and systems for assistive environments. The research within the project aims at the development of methodologies and tools to compose pervasive human-centered systems, which will be able to understand the human state (identity, emotions and behavior) in assistive environments using audiovisual and biological signals