As robots become increasingly integrated into human interactions, it is important to understand whether humans perceive them as more human-like or machine-like. Previous research has demonstrated that individuals observing two humans facing each other from a third-person perspective perceive a reduced distance between them, a phenomenon known as the spatial distance compression effect, which is attributed to the automatic attribution of social interaction between these humans. Our study replicates the effect in human-human dyads with a new method and investigates whether it extends to human-robot interactions. In an online experiment, 49 participants estimated distances between two humans and between a human and a robot, with the actors either facing each other or standing back-to-back. Data were analyzed using the method of constant stimuli and the point of subjective equality. The results revealed significant spatial distance compression in both human-human and human-robot dyads when the participants viewed the actors face to face, suggesting that human-robot dyads are similarly perceived as interactive and social.