Ce travail doctoral se situe dans le courant des approches comportementales en promotion des ventes. Les recherches antérieures ont omis de prendre en compte l’effet d’une variable importante, l’usage effectif des produits et des marques sur le comportement des consommateurs en matière de satisfaction et de fidélité. Dans cette thèse, nous analysons, dans le domaine de l’habillement, l’impact des dispositifs promotionnels et des soldes sur la satisfaction et la fidélité du consommateur, ainsi que le rôle médiateur de l’usage effectif des produits et des marques acquis par les consommateurs. En particulier, nous étudions l’effet direct du contexte d’acquisition, notamment en promotion, en soldes ou en outlet, sur la satisfaction du consommateur envers la transaction. De plus l’effet indirect de la fréquence d’usage des produits de la marque sur lien entre satisfaction et fidélité du consommateur est étudié. Afin de répondre à ces questions, un panel d’inventaire et d’usage, appartenant aux méthodes du journal personnel, a été mis en place afin de suivre les acquisitions et les usages des marques par des consommateurs. Nous mettons en évidence que si la satisfaction envers les transactions au bénéfice d’une marque influence négativement la fidélité, cet effet est compensé par la fréquence d’usage de la marque. Plus le consommateur est satisfait d’une transaction plus il utilise le produit et est enclin à être fidèle à la marque. En conclusion, certaines modalités du contexte d’acquisition dont les soldes et les ventes outlet présentent ainsi un potentiel de fidélisation du consommateur par la fréquence d’usage plus importante qui résulte de la satisfaction plus élevée dans ces contextes. / Within the behavioral research in sales promotion, the product and brand usage is almost never taken into account by researchers, in spite of its relevance as a mediating variable between sales promotion and satisfaction or loyalty. This research, applied to clothing, aims at studying the direct effect of the product acquisition context; and more specially the effect of a price discount, seasonal and outlet sales; on consumer transaction-Specific satisfaction. Moreover, the indirect effect of brand usage frequency on the link between satisfaction and customer loyalty is studied. To address these research questions we used a diary method study. This study aims to monitoring every week consumer’s purchases and clothing usage. Our results indicate that if the transaction-Specific satisfaction with a brand is negatively linked to consumer loyalty, it is compensated by increased brand usage frequency. The more a consumer is satisfied with the transaction, the more he uses the product and is likely to be loyal to the brand. Thus, as consumer transaction-Specific satisfaction is higher for purchases during seasonal sales or outlet sales than without these offers, it allows indirectly brands to build consumer loyalty.

Motivation is one of the strongest predictors of success in learning a foreign language. Although it has been discussed extensively, most studies have examined large world languages. This paper brings new insight into the motivation to learn Czech as a second language in the context of study abroad at Charles University in Prague. First, the theoretical part introduces essential theoretical frameworks of motivation in applied linguistics from a historical perspective, including the L2 motivational self-system (L2MSS) chosen for the empirical part. Secondly, study abroad as a language learning context is described, and literature on motivation to learn L2 in this context is reviewed. The methodology chapter summarizes possible approaches to research language learning motivation and assesses their suitability for the presented research. The empirical part examines the dynamic process of motivation among students coming for one semester to study in the Erasmus+ program at the Faculty of Humanities, Charles University, and in the American program UPCES (Undergraduate Program in Central European Studies) Study Abroad, Charles University. The data collection tools (diaries, questionnaires, and interviews) were tested in preliminary research. It was revealed that there is a relatively significant change...