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L'adolescence est une période importante de la vie caractérisée par des changements majeurs psychologiques et comportementaux qui ont été théoriquement et empiriquement reliés aux changements dans l'environnement social. Les différents milieux de vie des adolescents leur offrent un «terrain de jeu» pour explorer, tester, développer et intégrer des compétences cruciales nécessaires à l’interaction sociale, comme les comportements prosociaux. À l'adolescence, les relations entre pairs deviennent plus saillantes et plus importantes qu’a toute autre période de la vie. Au-delà des contextes familial et scolaire, les adolescents consacrent beaucoup de temps à différentes activités avec des pairs. Parmi ces activités, nous nous sommes focalisées sur la participation à des activités extrascolaires qui sont considérés comme un milieu de vie important dans le développement positif des adolescents.Le premier objectif de cette thèse était de mieux comprendre le rôle des milieux de vie dans l'empathie et les comportements prosociaux à l'adolescence. Nous avons développé et examiné un modèle théorique intégratif des relations entre les caractéristiques positives et négatives des milieux de vie (famille, classe et groupe de pairs extrascolaire), la perception par les adolescents des comportements prosociaux dans chacun de ces milieux de vie et de leurs propres comportements prosociaux, en tenant compte du rôle médiateur de l'empathie.Le deuxième objectif était de mieux comprendre les relations longitudinales bidirectionnelles entre l'empathie et les comportements prosociaux à l'adolescence, en mettant un accent particulier sur les processus internes à la personne.Enfin, le troisième objectif était de mieux comprendre les trajectoires de développement de l’empathie et des comportements prosociaux des adolescents en prenant en compte leur participation à des activités extrascolaires.Nous avons conduit un recueil de données longitudinales à 3 vagues avec un intervalle d’un an. Les adolescents ont répondu à des questions concernant les caractéristiques des trois milieux de vie, les comportements prosociaux dans chacun d’eux, leur participation extrascolaire, ainsi que leur empathie et leurs comportements prosociaux.Nos résultats suggèrent que les caractéristiques des groupes de pairs extrascolaires et de la famille (en particulier les plus négatives) et la perception de leurs comportements prosociaux jouent un rôle majeur dans les comportements prosociaux des adolescents via l'empathie à l'adolescence. Ils montrent également que l’empathie est un prédicteur des comportements prosociaux et que les trajectoires de développement de l’empathie et des comportements prosociaux à l’adolescence sont différentes chez ceux qui participent à des activités extrascolaires où on n’observe pas de trajectoire développementale décroissante comparé à ceux qui n’y participent pas.En utilisant une seule approche théorique dans trois milieux de vie différents, nous avons pu saisir les caractéristiques communes et spécifiques de la famille, du groupe-classe et des groupes de pairs extrascolaires, qui ont une influence sur les comportements prosociaux des adolescents. De plus, prendre en compte les différences entre les individus et les processus de développement intra-individuels, l’hétérogénéité des trajectoires développementales concernant l’empathie et les comportements prosociaux à l’adolescence est essentiel pour saisir l’interaction complexe entre la famille, la classe, le groupe de pairs extrascolaire, l’empathie et le développement prosocial / Adolescence is a significant period in life that is characterized by major changes that have been theoretically and empirically related to changes in social environments. Adolescents different living environments offer the “playground” to explore, to test, to develop and integrate social cues and crucial abilities that are necessary for social interaction, such as prosocial behaviours. During adolescence, peer relationships become more salient and prominent than in any other period in life. Away from the family and the school context, adolescents spend a large amount of time in activities with peers. Among these activities we focused on extracurricular activity participation, that have been conceptualised as an important developmental context of adolescents’ livesThe first aim of this dissertation was to provide more insight into the role of living environments in relation to empathy and prosocial behaviours in adolescence. We developed and examined an integrative model of the relations between positive and negative living environment features, adolescents’ perceptions of prosocial behaviours across the three contexts (family, class and extracurricular peer group) and their own prosocial behaviours, taking into account the potential mediating role of empathy.The second aim was to provide more insight into the bidirectional longitudinal relations between empathy and prosocial behaviours during adolescence, with a special focus on the within-person processes.Finally, the third aim of this dissertation was to provide more insight into adolescents’ prosocial behaviours and empathy developmental trajectories considering extracurricular activity participation.This dissertation used data from a 3-Wave longitudinal study gathered during the three years of the PhD with data collected at one-year intervals. Adolescents answered questions concerning the features of the living environment, their peer group’s and parents’ prosocial behaviours, extracurricular activity participation, and their own empathy and prosocial behaviour.Our findings suggest that extracurricular peer group features, family features (particularly the negative ones) and extracurricular peer group and parents’ prosocial behaviours play a major role in adolescents’ prosocial behaviours via empathy in adolescence.Therefore, we found that empathy is a driver of prosocial behaviours. We also identified that latent class growth for empathy and prosocial behaviour were different in the extracurricular activity group for which there was no downward trend trajectory over time compared to the non-extracurricular group.Using one approach across three living environments allowed us to capture the common and specific features of the family, school and extracurricular peer group contexts that influence adolescents’ prosocial behaviours. Furthermore, our results highlighted the need to acknowledge the between person differences and the within-person processes of development. Moreover, it is important to consider the heterogeneity of developmental trajectories concerning empathy and prosocial behaviours during adolescence if we want to capture the complex interplay between family, class, extracurricular peer group, empathy and prosocial development.

Physical activity plays a crucial role in maintaining overall health and reducing the risk of various chronic diseases. Step counting has emerged as a popular method for assessing physical activity levels, given its simplicity and ease of use. However, accurately measuring step counts in free-living environments presents significant challenges, with most activity trackers exhibiting a percent error above 20%. This study aims to address these challenges by creating a machine learning algorithm that leverages activity labels to improve step count accuracy in real-world conditions. Two approaches to balancing data were used: one employed a simpler oversampling technique, while the other adopted a more nuanced approach involving the removal of outliers. Models 1 and 2 were trained on each of these uniquely balanced datasets. Model 1 performed much better than Model 2 on testing datasets, but both achieved better than 20% error on new datasets, indicating their potential for more accurate step counting in real-world conditions. Despite challenges such as data imbalance, the study demonstrated the viability of using activity labels to enhance step counting accuracy. Future research should focus on addressing data imbalances and exploring more advanced machine learning techniques for more reliable activity monitoring.

New Genre Public Art was originally defined by Suzanne Lacy in 1991 as an activist approach to the public; it was a type of public art that was often created outside the institutional structure which brought the artist into direct engagement with the audience, while addressing social and political issues. In 1993, the public art exhibition ’Culture in Action’, curated by Mary Jane Jacob, marked a conceptual shift from static to dynamic public art. The exhibition is considered a landmark event in the development of public art as it was among the first projects to frame communities as the structure and content of its art.During the past decade (2010–2020), urban development has become incorporated as an integral part of the work of the Public Art Agency Sweden, and the agency have established their own curatorial department in order to curate and produce their own public art exhibitions. As Public Art Agency Sweden is a State agency, their work is largely determined by official policies formulated by the Swedish government. This thesis analyzes the contemporary policies of urban public art by conducting an interdisciplinary critical discourse analysis that merges art history, curatorial– and urban studies, in order to trace the influence of discourse to how Public Art Agency Sweden has operated within this intersection during the last decade––ultimately to discuss what the Swedish policies on public art strive to achieve and the risks, ethics and responsibilities of the emerging field of urban, context-based curatorship.

Alltmer tid spenderas i våra närmiljöer samtidigt som den sociala isoleringen ökar i samhället, och det har negativa effekter på hälsan. Närmiljön har därför stor inverkan på vår livsmiljö, där gestaltningen blir avgörande för att främja ett levande stadsrum. Denna studie undersöker det levande stadsrummet genom en fallstudie på Ebbepark i Linköpings kommun och med hjälp av kvalitativa intervjuer och dokumentanalyser. Resultatet visar att byggherrarna har en hög ambitionsnivå vad gäller gestaltningen där kommunen har ett övergripande ansvar att se till kommunens helhetsbehov. Slutsatsen som dras är att den höga ambitionen inte kunnat realiseras. Det kan förklaras av ekonomiska intressen samt bristande regleringar. Regleringarna kan komma att bli striktare för att säkerställa goda livsmiljöer. / The citizens are spending more time in our local environment meanwhile social isolation increases in our society which has a negative impact on our well-beeing. The local environment therefore has a major impact on the living environment, where the urban form becomes decisive in promoting a living urban space. The study examines the concept of life between buildings in a case study of Ebbepark, in the municipality Linköping, using qualitative interviews and document analysis. The result indicates that the developers have a high ambition in the urban form and where the municipality has a comprehensive responsibility to accommodate the society's needs. The conclusion is that the high ambition could not be executed. The explanation of this can be, financial interests and absences of regulations, which may become stricter to ensure quality living environments.

Alltmer tid spenderas i våra närmiljöer samtidigt som den sociala isoleringen ökar i samhället, och det har negativa effekter på hälsan. Närmiljön har därför stor inverkan på vår livsmiljö, där gestaltningen blir avgörande för att främja ett levande stadsrum. Denna studie undersöker det levande stadsrummet genom en fallstudie på Ebbepark i Linköpings kommun och med hjälp av kvalitativa intervjuer och dokumentanalyser. Resultatet visar att byggherrarna har en hög ambitionsnivå vad gäller gestaltningen där kommunen har ett övergripande ansvar att se till kommunens helhetsbehov. Slutsatsen som dras är att den höga ambitionen inte kunnat realiseras. Det kan förklaras av ekonomiska intressen samt bristande regleringar. Regleringarna kan komma att bli striktare för att säkerställa goda livsmiljöer. / The citizens are spending more time in our local environment meanwhile social isolation increases in our society which has a negative impact on our well-beeing. The local environment therefore has a major impact on the living environment, where the urban form becomes decisive in promoting a living urban space. The study examines the concept of life between buildings in a case study of Ebbepark, in the municipality Linköping, using qualitative interviews and document analysis. The result indicates that the developers have a high ambition in the urban form and where the municipality has a comprehensive responsibility to accommodate the society's needs. The conclusion is that the high ambition could not be executed. The explanation of this can be, financial interests and absences of regulations, which may become stricter to ensure quality living environments.