This paper is a conceptual paper discussing feedback, from a quadratic anthropocentric perspective where the feedbacks' source, e.g. the emitters, may be humans, non-digital technology, still-and inmotion technologies. Here, both the source-and the receiver of feedback are co-present, i.e. share a physical space. Still technologies mean here non-autonomous digital technologies, i.e. technologies that do not move by themselves, whereas in-motion technologies are defined here as semiautonomous digital technologies. The aim of the paper is to gestate the concept of feedback, and to inform the Multimodal-Elderly-Care-System (MECS) project, on design of robots for the stay-at-home elderly. The purpose of the paper is to advance the discussions within the human-computer interaction (HCI) field, around the concept of feedback frameworked by spatialitymore exactly proxemics.