Affective Computing is the science of creating emotionally aware systems, including the automatic analysis of affect and expressive behaviors [19]. Social computing is an interdisciplinary area that is concerned with the intersection of social behavior and computational systems [26]. Affective and social computing are two research fields that involve human and computer sciences defining them as featured by an interdisciplinary nature. In this perspective, a growing need within research concerning affective and social technologies is to combine and integrate psychological and computer sciences in order to make the technologies aware of human emotions and behaviors and able to interact with humans as well. The main purpose of this special issue is to advance emotion and social behavior recognition in order to understand their psychological features but also implement multimodal interaction with applications. The idea is to set the state of the scientific research on socioaffective technologies by integrating both the computational and psychological approaches in understanding, recognizing and shaping affective processes in the real and new social environments (social media, virtual reality) even in educational contexts. In psychological sciences, affective processes can be focused on individual, interactional and social dimensions [6, 21, 22]. All three dimensions can be explored by means of the analysis of verbal, physiological and expressive aspects which generally use one or more communicative modalities [20]: linguistic or rhetorical [3, 5, 16, 17], voice [25], facial [13], head [23] gestural or touching [20], postural modality [1]. In this context, from a computational point of view it is necessary to cope with real-time recognition of the meaning of human behaviors in contextual situations both from the cognitive and affective points of view. Especially in domains such as education [2, 4, 7, 9,