The personalization of the home as an expression of identity has been a recurring theme in the literature, mainly focusing on the home as an expression of the self. Generally speaking, an effort has been made to study how the decoration and personalization of home spaces allow one to identify the resident's personal traits. This piece of research attempts to find out to what extent a consensus perception concerning the resident of an unshared bedroom is produced when his/her bedroom is observed. It also aims to measure to what extent the endogroup and the exogroup differ when attributing traits. In order to do so, more than a hundred university students and another hundred people over the age of 65 were shown a series of slides showing bedrooms occupied by a one person. Six of these belonged to young people (aged between 18 and 25) and another six belonged to people over the age of 65. All the occupants lived with their families, either with their parents or with their children, respectively. Both samples –young and old people– had to respond to a questionnaire consisting of 12 lists (one per bedroom) containing adjectives referring to personality traits and socio-demographic characteristics. The analysis of the data allowed us to establish which traits of both Fiske’s theory and of the Big-Five are attributed to each one of the groups and observe to what extent belonging or not belonging to a group affects the attribution of traits.