sustainability Article Analysis of Psychometric Properties of the Quality and Satisfaction Questionnaire Focused on Sustainability in Higher Education María del Carmen Olmos-Gómez 1, * ,Mónica Luque-Suárez 2, *, Concetta Ferrara 3 and Jesús Manuel Cuevas-Rincón 1 1 Department of Research Methods and Diagnosis in Education, Faculty of Education and Sport Science, University of Granada, 52005 Melilla, Spain; jcuevas@ugr.es 2 Department of Sociology, Faculty of Education and Sport Science, University of Granada, 52005 Melilla, Spain 3 Associazione Culturale Italiana Per La Formazione, A.C.I.F. University of Naples, Via Salvatore Gambardella, 19, 80145 Napoli NA, Italy; concetta.ferrara@istruzione.it * Correspondence: mcolmos@ugr.es (M.d.C.O.-G.); mlsuarez@ugr.es (M.L.-S.) Received: 10 September 2020; Accepted: 30 September 2020; Published: 8 October 2020   Abstract: The aim of this research was to develop and validate a questionnaire to assess the quality of education, from a sustainability perspective, in higher education institutions of Naples (Italy), and determine whether differences exist between the groups (families, teachers and, students) with respect to their level of satisfaction concerning that quality, since it is important that education policies promote that assessment from an economic, social, environmental, and organisational dimension. The questionnaire was validated using a quantitative, quasi experimental, cross sectional method. A multivariate analysis of variance (MANOVA) was conducted on a sample of n = 1091 subjects to study the differences between the groups and their level of satisfaction. The results show a good reliability and validity. In this MANOVA, significant differences and large effect sizes were found. Families and teachers consider that quality management in higher education is adequate. The three groups are very satisfied with teaching management, and the teachers’ group has the higher level of satisfaction with teaching planning. It is concluded that this validated questionnaire provides information on the opinions about the quality of education from a sustainability perspective and that the self-assessment of those responsible for teaching is essential to achieve continuous improvement. Keywords: quality; multivariate analysis; satisfaction; higher education; sustainability 1. Introduction Quality, nowadays, is generally regarded as a somewhat hollow term that requires a definition consistent with other concepts such as continuous improvement, excellence in performance, and user satisfaction, among others [1], with the latter specifically being one of the quality indicators to which the 21 st century society is committed in different fields [2], as well as curricular sustainability, with a view to addressing social, cultural, economic, and environmental problems from a sustainable approach, in all aspects of education and learning [3]. The existing academic field focusing on sustainability studies long-term problems with nonlinear behaviours related to the economic, social, and environmental spheres, locally or globally, which imply a potential damage [4]. In this sense, higher education becomes a key element to ensure that the learning processes of future citizens incorporate this holistic and critical perspective [5], and thus, as pointed out by [6], it is a challenge that educational institutions must meet, through teacher training, for the construction of sustainable societies. Within the educational context, according to Llanera [7], the concept of quality implies a continuous improvement process in order to better achieve the general objectives and goals of educational Sustainability 2020, 12, 8264; doi:10.3390/su12198264 www.mdpi.com/journal/sustainability