[ca] Les societats occidentals actualment es caracteritzen per una heterogeneïtat cultural i social més gran que la hi havia unes dècades abans. A aquest escenari de gran heterogeneïtat se l'anomena "superdiversitat" per part dels investigadors d'aquesta àrea. És en aquest context on es desenvolupa el procés d'aculturació, entès com el canvi individual i cultural que es dona quan persones de diferents cultures entren en contacte. La superdiversitat, però, ha canviat la manera d'experimentar aquest procés, tant quantitativa com qualitativament. D'altra banda, el comunitari és l'àmbit on es produeix un dels contactes interculturals més rellevants. Malgrat això, la seva influència específica a l'aculturació ha estat menys estudiada, tot i que en aquest context es produeixin contactes interculturals de manera quotidiana. Pel que fa als grups culturals, el col·lectiu llatinoamericà és un dels més importants en la migració internacional a Espanya i específicament a Barcelona, però no sempre seu nivell d'integració en la societat coincideix amb l'esperat, d'acord amb la hipòtesi de la similitud cultural. És per tot això que l'objectiu d'aquesta tesi doctoral va ser comprendre el procés d'aculturació entre autòctons i migrants llatinoamericans en un context comunitari de superdiversitat a la ciutat de Barcelona. Per a arribar a aquest objectiu es va emprar una metodologia qualitativa, amb un disseny d'estudi de cas, sent el cas un barri específic de Barcelona amb característiques de superdiversitat. Hi van participar un total de 79 persones, entre veïns, líders d'associacions veïnals i professionals de serveis sociocomunitaris del barri escollit. Les tècniques emprades per recopilar la informació van incloure entrevistes individuals, grups focals i una reunió de discussió comunitària.

[en] Western societies are currently characterized by greater cultural and social heterogeneity, compared to previous decades. Researchers in the area use the term "superdiversity" to refer to this scenario of great heterogeneity. The acculturation process happens in this context, which consists of the individual and cultural change that occurs when people from different cultures come into contact. However, superdiversity has changed the way we experience this process, both quantitatively and qualitatively. On the other hand, it is in the community level where one of the most relevant intercultural contacts occurs. Despite this, its specific influence on acculturation has been studied to a lesser degree, even when in this context intercultural contacts take place daily. Regarding cultural groups, the Latin American group emerges as one of the most relevant in international migration in Spain and specifically in Barcelona. However, their level of integration in this society does not always coincide with what is expected, according to the hypothesis of cultural similarity. Therefore, the objective of this doctoral thesis was to understand the acculturation process between natives and Latin American migrants, in a community context with superdiversity of the city of Barcelona. In order to achieve this objective, a qualitative methodology was used with a case study design, choosing a specific neighbourhood in Barcelona characterized by superdiversity as the case. A total of 79 people participated, including neighbours, leaders of neighbourhood associations, and socio-community services professionals from the selected borough. Techniques used to collect information included: individual interviews, focus groups, and a community discussion meeting. The results indicate that in this neighbourhood, intercultural relations are almost non-existence, which makes it difficult to establish the acculturation process. This is because the associated psychological and cultural changes of this process require intercultural contact that facilitates the exchange of experiences, values, and customs. Another obstacle is the racist attitudes of some native neighbours, influenced by political, historical, and sociocultural factors discussed as macrosystem elements that impact acculturation. Despite these barriers, several participants highlighted informal community spaces, such as bars and shops, where intercultural interactions occur that allows conviviality, acting as a facilitator of acculturation. Another important element is neighbourhood identity, both for natives and for some migrant neighbours. Regarding the conclusions and theoretical implications of this doctoral thesis, one of them is the empiric support to the understanding of acculturation as a dynamic, situated, and multidirectional process, in accordance with what is indicated by emerging acculturation models. Furthermore, neighbourhood identity emerges as a potentially unifying local identity that can contribute to intercultural conviviality and the way in which acculturation is experienced. The latter has practical implications that can be addressed in psychosocial and community interventions. Finally, it is concluded that this thesis corroborate the contribution of qualitative methodologies, especially ethnographic and participatory methodologies, to the study of acculturation and cultural diversity.