To answer these and other questions the interdisciplinary research collaboration (Speech and Language Pedagogy & Therapy + Computer Science + Electric Engineering) of the "Leibniz Lab for Relational Communication Research" focuses on researching the relational aspects of communication: Processes of intersubjective, intuitive, emotional attunement, whose irritation we instantly perceive when communicating with a language impaired person but also with a computer program (like an avatar). These multimodal attunement processes take place on different levels: Language, voice, gesture, facial expressions and physiological parameters (like heartbeat) are involved among others.