"1. IntroductionThis contribution regards the validation of two instruments measuring the quality of the relationship that inhabitants have with their urban neighbourhoods. Such instruments consist of eleven scales measuring the perceived environmental qualities of urban neighbourhood and one scale measuring the neighbourhood attachment. According to scientific literature on perceived residential quality and residential satisfaction (e.g.: Canter, 1983; Amérigo, 2002), the neighbourhood's residential environment is articulated in the following components of inhabitants' place experience: spatial (neighbourhood architecture and town-planning), human (social groups and lifestyles in the neighbourhood) and functional (services in the neighbourhood). A study by Bonaiuto et al. (1999) reported a fourth evaluative aspect regarding context factors (i.e., pace of life, environmental health/pollution and upkeep/care). As regards the pattern of neighbourhood attachment, it is considered as a part of the more general place attachment construct (Giuliani, 2002). Brown and Perkins (1992) defined place attachment as the positive affective, cognitive, and behavioural bonds that people develop across the time with their social and physical environment. Residential environments are, because of their relational and temporal salience, the most important (and thus the most studied) places toward which people may attach during their lifetime. Research contributions on residential attachment operationalised it in terms of a general affective link between people and the global aspects of their residence. The need of valid and reliable tools for measuring these constructs, as also stressed by various authors (e.g., see Amerigo, Aragones, 1990), was the starting point of a long period of research and data accumulation. The large amount of data gathered, and the consequent step-by-step refinement of the instruments, led to the present version, with some changes respect to the preliminary versions (see Bonaiuto et al., 2003). 2. Objective and hypothesisOn the whole, this contribution aims at standardizing and validating instruments measuring different aspects of residential neighbourhood environmental quality perception, through a national-based sample, which mirrors a spectrum of the different national urban typologies. Hence, it is hypothesised a confirmation of structure and number of both the indicators of perceived environmental quality and the neighbourhood attachment index in medium- and small-size towns, with respect to the studies which used a previous version of these instruments in various residential areas of a large city like Rome (see Bonaiuto et al., 1999).3. MethodParticipants were 1488 residents (balanced for the principal socio-demographic and residential indexes) in different neighbourhoods of 11 Italian medium- and low-extension (i.e., from 400000 to 50000 inhabitants) urban contexts (i.e. Palermo, Latina, Cesena, Pescara, L'Aquila, Grosseto, Agrigento, Firenze, Bologna, Matera, Salerno). The instruments consist of eleven scales (N items = 150) measuring Perceived Residential Environmental Quality Indicators (PREQIs) and one scale (N items = 8) measuring Neighbourhood Attachment (NA). The eleven scales are included in the four generative criteria as follows: three scales regard the spatial aspects (i.e., architectural-planning space, organization and accessibility of space, green space); one scale regards human aspects (i.e., people and social relations); four scales regard functional aspects (i.e., social, recreational, commercial, transportation facilities); three scales regard contextual aspects (i.e. pace of life, cleanness/quietness, upkeep/care). The response scale is a 7-step Likert-type, from "totally agree" to "totally disagree". In each scale, half of the items express presence of environmental quality, the other half express lack of quality. Data were gathered by means of a self-report questionnaire delivered to the participants' house by trained interviewers. A confirmatory factor analysis was performed on each scale.4. ResultsResults confirmed the factorial structure of the scales, which include nineteen perceived quality indexes and one neighbourhood attachment index. Such scales show an increased level of reliability with respect to the previous studies."