Our daily interactions with other people and groups are guided by various social signals including speech, body movements, facial expressions, and nonverbal vocalisations . The Social Interaction Lab analyses these signals and behaviours in both controlled environments and non-controlled social settings. Helped by the latest technologies we investigate empathy, gossip, laughter, facial expressions, interactions between groups, and human factors in cybersecurity. In the social interaction lab we not only focus on understanding the dynamics of social interactions, but also develop new statistical and experimental techniques for their study.