Ma thèse porte sur les questions liées à la création de valeur et à la capture de valeur dans les écosystèmes d’entreprise. J'explore comment les acteurs à but non lucratif et à but lucratif façonnent ces écosystèmes et leur évolution à travers la conception de relations avec des compléments clés.Le premier chapitre utilise un modèle formel pour étudier comment un acteur à but non lucratif, en interagissant de manière stratégique avec les entreprises, peut faciliter la création de valeur dans les chaînes d'approvisionnement verticales. Le deuxième chapitre étudie les stratégies utilisées par les entreprises pour façonner l'écosystème dans lequel elles se font concurrence et maximiser la capture de valeur. Plus précisément, j’examine la décision des entreprises de rendre leur produit compatible avec de multiples compléments ou de le garder exclusif d’un complément spécifique dans le contexte du marché des médicaments anti-VIH. J'utilise un ensemble de données exclusif sur la consommation de médicaments au niveau individuel, obtenu auprès de l'assurance maladie nationale française, ainsi que des données collectées manuellement sur les essais cliniques de médicaments anti-VIH. Le troisième chapitre jette un pont entre les deux premiers chapitres et explore la manière dont les acteurs à but non lucratif façonnent activement l’écosystème en comparant les essais cliniques sur les médicaments anti-VIH parrainés par des entreprises et par des organismes à but non lucratif.Pour conclure, je cherche à comprendre comment les entreprises peuvent maximiser la création de valeur et la capture de valeur dans les contextes où les produits complémentaires sont importants. Je m'efforce d'inclure les acteurs à but non lucratif en tant que partie intégrante de l'écosystème et de comprendre comment les actions d'acteurs qui ne cherchent pas à maximiser leurs profits affectent les stratégies des acteurs à but lucratif vis-à-vis de leurs compléments. / My thesis focuses on issues related to value creation and value capture in business ecosystems. I explore how nonprofit and for-profit actors shape these ecosystems and their evolution through the design of relationships with key complements.The first chapter uses a formal model to study how a nonprofit actor, by strategically interacting with firms, can facilitate value creation in vertical supply chains. The second chapter studies the strategies that firms employ to shape the ecosystem they compete in and maximize value capture. Specifically, I look at firms’ decision regarding whether to make their product compatible with multiple complements or keep them exclusive for a specific complement in the context of anti-HIV drug market. I use a proprietary individual-level dataset on drug consumption obtained from the national French healthcare insurance and hand-collected data on clinical trials of anti-HIV drugs. The third chapter bridges the first two chapters and explores how nonprofit actors actively shape the ecosystem by comparing firm-sponsored and nonprofit-sponsored clinical trials on anti-HIV drugs.To conclude, I seek to understand how firms can maximize value creation and value capture in the contexts where complementary products are important. I strive to include nonprofit actors as an integral part of the ecosystem and understand how the actions of actors who do not seek to maximize profit affect the strategies of for-profit actors towards their complements.

This paper adopted second language acquisition theories and research methods to investigate how second-language (L2) Chinese learners acquire Chinese directional complements (DCs). It included two main parts: a corpus study and a questionnaire survey. The corpus came from the compositions of 47 Chinese learners at intermediate and advanced levels at a New England university. And the data also included the questionnaire survey of 82 novice, intermediate, and advanced levels’ Chinese learners and 15 native Chinese speakers who study in the same university. The corpus study shows that L2 learners at intermediate and advanced level preferred to use DCs with extended meanings. Moreover, they preferred to combine verb with DC as an entirety rather than placing the object between verb and DC. The error analysis based on the survey data shows that omission errors of DCs accounted for the largest percentage, the percentage of misordering errors and misuse errors were very close, and addition errors were limited. Moreover, a relative acquisition sequence was constructed according to accuracy rate and the usage rate. This acquisition sequence reflects several phenomena: 1) the position of the object influenced the acquisition significantly; 2) some errors were caused vi by interlingual transfer 3) DCs with extended meanings were easier than DCs with directional meanings in some cases; 4) the type of DC was not an important factor to affect the acquisition sequence; 5) L2 learners’ comprehension competence was better than the expression competence at all level; 6)and some DC patterns’ average accuracy increased at higher level, however, the errors of certain DC patterns were fossilized. Since the presentation of the DCs in the textbooks can impact the acquisition. The researcher evaluated the presentation of DCs in participants’ textbooks. There were some deficiencies, such as overwhelming introduction in one lesson, repeating introduction of the same DC, and so on. At last, some implications to teaching DCs were provided based on the findings in previous chapters.

Previous studies on children’s acquisition of depicting verbs in signed languages have chiefly studied the use of classifiers in verbs of motion and location, particularly the order in which the different classes of handshape are acquired. The age of the children in these studies have ranged from age three to thirteen, and an important finding has been that classifier constructions are not fully acquired until early adolescence. Most of these studies have used an elicitation tool to investigate the production and comprehension of classifiers, but have not provided any adult target norms of the test items when scoring children’s achievement. The present dissertation provides a detailed description of both adults’ and children’s verb constructions in descriptions of cutting and breaking events in Swedish Sign Language (SSL), specifically focusing on the number of hands used in signing, handshape category and hand activity, which has not been previously described for any sign language. As part of this study, 14 deaf adults (ages 20–72) and 11 deaf children (2;1–6;6) of deaf parents, all native-users of SSL, performed a task that involved describing 53 video clips of cutting and breaking events. The clips show an event in which an actor separates material, either with the aid of a tool or without. Additionally, some clips show an entity separating by itself without an actor being involved. The adults described the events with depicting verb constructions that are produced with two hands. The analysis of the handshapes produced three categories: substitutor, manipulator and descriptor. The most frequent construction in the description of events without a tool was two acting manipulators (depicting a hand handling an object), whereas in descriptions of events with a tool the combinations were acting substitutor or manipulator with a non-acting manipulator. The acting hand referred to the tool and the non-acting manipulator to the affected entity. In descriptions of events without an actor, either two substitutors or two manipulators were used. In addition to depicting verb constructions, the descriptions also contained resultative complements, i.e. signs carrying information about the result of the activity being carried out. The complements were either lexical signs or some form of depicting verb construction. Similar observations have not been noted for any other signed language. In the manner of the adults, the children used depicting verb constructions in descriptions of cutting and breaking events (681 tokens), but they also used pointing and lexical signs (64 tokens). Nearly half of the verb constructions that were used by the children corresponded to the adult target forms. The majority of the constructions describing events without a tool corresponded to the adult target forms using two acting manipulators, even among the youngest informants. In events with a tool, only a third of the constructions corresponded to the adult target forms (emerging at 4;8 – 5;0); the remaining two-thirds were deviating constructions in terms of number of hands, handshape category and hand activity. Resultative complement are sparsely used by children (57 tokens), the most chosen type of complement being lexical signs. Pervasive features of children’s constructions were the addition of contact between the hands and a preference for substitutors, something not found in adults’ constructions. These features were elucidated within the framework of Real Space blending theory, with the study showing that children first use visible blended entities and that invisible blended entities do not emerge until 4;8–5;0. / <p>Disputationen teckenspråkstolkas</p>

Germany is one of the several countries in Europe that have opened its borders to immigrants for many years. The admission of immigrants into Germany has contributed to the country being the second largest immigration destination in the world, and this has resulted in both negative and positive outcomes for the natives. In this essay, the effect of immigration on natives’ hourly wages and employment was examined, by using microdata for Germany. Native workers’ educational level attainments and 16 different regions in Germany were taken into account to obtain regional variation. Cross-sectional data was used for the years 2005, 2009 and 2015 in order to measure the effect of the share of immigrants on natives’ hourly wages and employment. The findings showed that the share of immigrants, had a positive effect on natives’ wages and employment in 2005 and 2009. In 2015, however, a negative relationship was found, with the share of immigrants impacting negatively on natives’ wages but not on employment. Thus, the study highlights the importance of immigrants on natives’ hourly wages and employment.

Η σεργλυκίνη (SG) είναι μια πρωτεογλυκάνη που εκφράζεται και εκκρίνεται από το σύνολο σχεδόν των αιμοποιητικών κυττάρων, ενώ αποτελεί την κύρια πρωτεογλυκάνη η οποία εκκρίνεται από τις κυτταρικές σειρές πολλαπλού μυελώματος (ΠΜ). Έχει βρεθεί ότι η SG συμμετέχει στη ρύθμιση πληθώρας παραγόντων που εμπλέκονται σε αντιδράσεις φλεγμονής. Τα αποτελέσματά μας δείχνουν ότι η SG που εκκρίνεται από τα μυελωματικά κύτταρα έχει την ικανότητα να αναστέλλει τόσο την κλασσική όσο και τη λεκτινική οδό του συστήματος του συμπληρώματος, ενώ δε φαίνεται να έχει καμία επίδραση στο εναλλακτικό μονοπάτι. Επιπρόσθετα η SG δεν έχει την ικανότητα να προκαλεί την ενεργοποίηση κάποιου από τα τρία μονοπάτια του συμπληρώματος. Βρέθηκε ότι η ανασταλτική δράση της SG εκδηλώνεται μέσω της αλληλεπίδρασής της με τους παράγοντες C1q και MBL. Οι γλυκοζαμινογλυκανικές (GAGs) αλυσίδες της SG είναι υπεύθυνες για τη δέσμευση με την κολλαγονούχα ουρά του παράγοντα C1q, ενώ στη δέσμευση με την MBL πρωτεΐνη πέρα από τη συμμετοχή των GAG αλυσίδων απαιτείται και ο πρωτεϊνικός κορμός της SG. Επιπλέον βρέθηκε ότι αλυσίδες CS-E ελαττώνουν την ικανότητα δέσμευσης της SG με τα μόρια C1q και MBL. Οι αλληλεπιδράσεις της SG με τον C1q και την MBL βρέθηκε ότι είναι ιοντικού χαρακτήρα και σε αντίθεση με τη δέσμευση της SG με την MBL, που εξαρτάται από την παρουσία των ιόντων Ca2+, η αλληλεπίδραση της SG με τον C1q είναι ανεξάρτητη των ιόντων αυτών. Αν και τα επίπεδα της SG στον ορό των ασθενών με ΠΜ εμφανίζονται αυξημένα σε σχέση με τους φυσιολογικούς μάρτυρες, δεν εντοπίστηκαν στατιστικά σημαντικές διαφορές στην δραστικότητα της κλασσικής και της εναλλακτικής οδού του συμπληρώματος στους ασθενείς με ΠΜ και στους φυσιολογικούς δότες. Ωστόσο ενδιαφέρον αποτελεί το γεγονός ότι στους ασθενείς με ΠΜ τα υψηλά επίπεδα SG στον ορό εμφάνισαν τάση συσχέτισης με ελαττωμένη δραστικότητα της κλασσικής οδού του συμπληρώματος. Επιπρόσθετα, η SG που εκκρίνεται απ τα μυελωματικά πλασματοκύτταρα έχει την ικανότητα να προστατεύει τα κύτταρα αυτά από την επίδραση του συμπληρώματος, μετά την ενεργοποίησή του με τη χρήση φαρμάκων. Φαίνεται ότι και η SG της μεμβράνης των μυελωματικών κυττάρων παρουσιάζει προστατευτική δράση έναντι του συμπληρώματος, μιας και κύτταρα που δεν εκφράζουν SG στην επιφάνειά τους είναι δύο με τρείς φορές περισσότερο ευαίσθητα στη δράση του συμπληρώματος, σε σχέση με κύτταρα που την εκφράζουν. Προτείνουμε ότι τόσο η εκκρινόμενη όσο και η δεσμευμένη στην κυτταρική επιφάνεια SG προστατεύουν τα μυελωματικά πλασματοκύτταρα κατά την ανοσοθεραπεία και συμβάλουν στην επιβίωσή τους. Στην παρούσα μελέτη δείξαμε ότι η SG αλληλεπιδρά με το κολλαγόνο τύπου Ι, την πιο άφθονη μορφή κολλαγόνου στο οστό. Επιπλέον βρέθηκε ότι η SG της κυτταρικής επιφάνειας συμμετέχει στην προσκόλληση των μυελωματικών κυττάρων στο κολλαγόνο τύπου Ι. Η αλληλεπίδραση αυτή φαίνεται ότι επάγει την έκφραση από τα μυελωματικά πλασματοκύτταρα των ΜΜΡ-2 και ΜΜΡ-9. Επιπρόσθετα, υπολογίστηκαν τα επίπεδα των ΜΜΡ-2 και ΜΜΡ-9 στον ορό και στο μυελό ασθενών με ΠΜ. Βρέθηκε ότι στον ορό των ασθενών με ΠΜ τα επίπεδα των δύο ενζύμων εμφανίζονται ελαττωμένα σε σχέση με τα φυσιολογικά δείγματα, ενώ αντίθετα στον μυελό των ασθενών η ΜΜΡ-2 βρέθηκε σημαντικά αυξημένη σε σχέση με τους φυσιολογικούς δότες. Καμία μεταβολή δεν παρατηρήθηκε στα επίπεδα της ΜΜΡ-9. Τέλος τα επίπεδα της ΜΜΡ-2 του μυελού ασθενών με ΠΜ βρέθηκε ότι σχετίζονται τόσο με τα επίπεδα του ενζύμου στον ορό, όσο και με τον δείκτη οστικής απορρόφησης ΝΤx, υποδηλώνοντας τη συμμετοχή της στην παθοβιοχημεία της οστικής νόσου που εμφανίζεται στο ΠΜ. Αντιθέτως καμία συσχέτιση δεν βρέθηκε για την ΜΜΡ-9, δηλώνοντας ότι ίσως το ένζυμο αυτό να εμπλέκεται σε άλλες διεργασίες που επιτελούνται στο ΠΜ. / Serglycin (SG) is a proteoglycan expressed by hematopoietic cells and is constitutively secreted by multiple myeloma (MM) cells. SG participates in the regulation of various inflammatory events. We found that SG secreted by human MM cell lines inhibits both the classical and lectin pathways of complement, without influencing alternative pathway activity. It was also shown that SG could not initiate any activation of the complement system. The inhibitory effect of SG is due to direct interactions with C1q and mannose binding lectin (MBL). C1q-binding is mediated through the glycosaminoglycan moieties of SG, whereas binding to MBL requires the presence of SG protein core. Interactions between SG and C1q as well as MBL are diminished in the presence of chondroitin sulfate type E. In addition, we localized the SGbinding site to the collagen-like stalk of C1q. Interactions between SG and C1q as well as MBL are ionic in character and only the interaction with MBL was found to be partially dependent on the presence of calcium. Although we found the serum levels of SG to be elevated in patients with MM compared to healthy controls, no statistical significant differences were observed for classical and alternative pathway activity in sera between MM patients and healthy donors. Despite that, it is proved that increase levels of SG show a tendency to correlate with decreased levels of classical pathway activity in serum of MM patients. Moreover, we found that SG expressed from myeloma plasma cells protects these cells from complement activation induced by treatment with anti-thymocyte immunoglobulins. It is also demonstrated that SG on the surface of MM cells inhibits complement deposition on the membrane of these cells. Cells which do not express SG on its’ surface are 2-3 times more sensitive to complement attack compared with cells expressing high levels of SG. This might protect myeloma cells during immunotherapy and promote survival of malignant plasma cells. Moreover, it is shown that SG from MM cells is capable to interact with collagen type I, the most abundant collagen in bone. Furthermore, SG is present on the surface of myeloma plasma cells and it is involved in the adhesion of MM cells to collagen type I in bone marrow microenvironment. In addition, it is shown that the interaction of myeloma plasma cells to collagen type I, mediated by cell surface SG, induces expression and secretion of both MMP-2 and MMP-9 from MM cells. Along the process, we have investigated levels of MMP-2 and MMP-9 in serum and marrow of patients with MM. Decreased levels of both MMP-2 and MMP- 9 in serum of MM patients have been observed compared to healthy donors. Instead, MMP-2 was found to be increased in bone marrow of MM patients compared to control samples, while no differences observed for MMP-9. Finally, marrow levels of MMP-2 seem to correlate with serum levels of the enzyme along with a marker of bone resorption, NTx. This might indicate the implication of MMP-2 in the pathogenesis of bone disease in MM. Even though, no correlation of MMP-9 with NTx was observed, proving that MMP-9 may play a significant role in different pathogenetic mechanism occurring in MM.

Dans le cadre des approches constructionistes, cette thèse étudie les verbes labiles de l’anglais, qui peuvent manifester des configurations syntaxiques variées sans changer de forme. L’étude de la complémentation de ces verbes montre que leur catégorisation en familles sémantiques est pertinente mais pas suffisante pour expliquer leur comportement. La thèse défend une approche syncrétique de la complémentation du verbe qui rend compte de son importante productivité et de ses limites parfois arbitraires. Une analyse montre que les verbes ont tous une configuration syntaxique par défaut, qui n’est pas signifiante et qui permet simplement au verbe d’exprimer ses arguments de façon non marquée, en accord avec certains principes de cohérence conceptuelle. À l’inverse, lorsque la complémentation du verbe a un apport sémantique identifiable, l’existence de schémas de complémentation pleinement signifiants est postulée. Il s’agit d’ensembles de compléments dont le sens est distinct de celui du verbe auquel ils sont associés et se retrouve de façon régulière avec des verbes de catégories diverses. Il est démontré que les schémas de complémentation doivent être considérés comme des unités linguistiques de plein droit de l’anglais. Cela implique qu’en synchronie, ces schémas sont emmagasinés par les locuteurs plutôt que le résultat d’un processus d’analogie avec des constructions existantes. Leur statut d’unité linguistique permet d’étudier leur sémantisme de la même façon que des unités lexicales plus classiques. S’ils sont en majorité polysémiques, certains schémas ont des emplois difficiles à relier sémantiquement et doivent donc être considérés comme des homonymes. / Within a constructionist framework, this thesis studies English labile verbs, which can enter into various syntactic configurations without changing form. A study of their complementation shows that categorizing them into semantic families is relevant but not sufficient to explain their behavior. The thesis defends a syncretic approach to verb complementation to that accounts for its important productivity and its sometimes arbitrary limits. It is shown that all verbs have a default syntactic configuration, which is not meaningful and which simply allows the verb to express its arguments in an unmarked way, in accordance with certain principles of conceptual coherence. Conversely, when the complementation of the verb has an identifiable semantic contribution, the existence of fully meaningful patterns of complementation is posited. These are defined as sets of complements, whose meaning is distinct from that of the verb with which they are associated and is found regularly with verbs of diverse categories. It is shown that patterns of complementation should be considered fully-fledged English linguistic units. This implies that synchronically, these patterns are mentally stored by speakers rather than the result of a process of analogy with existing constructions. Their status as linguistic units makes it possible to study their meaning in the same way as more classical lexical units. Although most of them are polysemic, some patterns of complementation exhibit uses that are difficult to link semantically and must therefore be viewed as homonyms.

O fenômeno da factividade, no âmbito da linguística, em sentido amplo, está relacionado à propriedade que certos itens lexicais ou determinados predicadores gramaticais possuem de introduzir um pressuposto, que pode estar implícito ou explícito. No domínio verbal, Kiparsky e Kiparsky (1971) remetem a um conjunto de verbos, os quais admitem uma sentença como complemento e cujo uso pressupõe a veracidade da proposição aí expressa. Em termos aquisicionais, não há consenso acerca da idade em que factividade estaria dominada. Hopmann e Maratsos (1977), por exemplo, propuseram que seu domínio se daria a partir dos 6 anos. Para Abbeduto e Rosenberg (1985), no entanto, isso ocorreria mais cedo, por volta dos 4 anos de idade. Já Schulz (2002; 2003), defende uma aquisição gradual, que se daria por estágios e se estenderia até os 7;0 anos de idade. Léger (2007), por sua vez, afirma que o domínio da factividade, especificamente dos semifactivos, só se daria após os 11 anos. Scoville e Gordon (1979), por fim, propõem que só por volta dos 14 anos a criança seria capaz de dominar a factividade em todos os seus aspectos. Essa falta de consenso corrobora a ideia de uma aquisição gradual, uma vez que esse fenômeno envolve vários aspectos: identificação de uma subclasse de verbos, uma interpretação semântica específica, uma subcategorização sintática variável entre as línguas e um comportamento característico no que diz respeito ao movimento-QU. Esta dissertação tem como objetivo geral contribuir para os estudos sobre aquisição da factividade, particularmente no que diz respeito ao português, debruçando-se mais especificamente sobre dois aspectos pouco explorados na literatura da área: uma questão de variação translinguística, que diz respeito à possibilidade de se admitirem complementos não-finitos factivos em português, e a questão da interpretação de interrogativas-QU em contextos factivos, com propriedades características de ilha fraca. O quadro obtido é discutido frente às análises linguísticas propostas para os verbos/ predicados factivos, que têm considerado uma distinção sintática (KIPARSKY E KIPARSKY, 1971; MELVOLD, 1991; SCHULZ, 2003; AUGUSTO, 2003; LIMA, 2007), com repercussões de ordem lógico/ semântica (LEROUX E SCHULZ, 1999; SCHULZ, 2002; 2003) / In the realm of linguistic theory, the phenomenon of factivity is, in a broad sense, related to the property some lexical items or predicates exhibit of introducing an implicit or explicit presupposition. In the verbal domain, Kiparsky and Kiparsky (1971) assume that factive verbs carry the presupposition that the complement clause they may subcategorize expresses a true proposition. From the acquisition point of view, there is no clear consensus about the age of mastery of the properties of factive sentences. Hopmann & Maratsos (1977) conclude that factive sentences are mastered around age 6. For Abbeduto & Rosenberg (1985), children age 4 have already achieved it. Schulz (2002; 2003) argues for a stepwise acquisition pattern, suggesting stages children pass through up to 7 years old. Léger (2007) adds to Schulzs yet another stage in order to account for some semifactive verbs, for which the right distinction wouldnt be in place before 11 years old. At last, Scoville & Gordon (1979) suggest that only 14 year olds would be able to fully master factivity. This variety of results corroborate the idea of a stepwise acquisition pattern, let alone the different aspects involved in the phenomenon of factivity: the identification of a class of verbs allowing a factive reading, its presuppositional character, interlinguistic variation concerning possible subcategorization frames and a specific behavior as far as extraction in complex sentences is considered. This study aims at contributing for the investigation of the acquisition of factivity in Portuguese, focusing specifically on two underexplored aspects: the possibility of some factive predicates allowing non-finite complements in this language and the extraction patterns in factive complex sentences. The results obtained are discussed in the light of linguistic analyses, which couch on distinct syntactic features assigned to the factive predicates, (KIPARSKY E KIPARSKY, 1971; MELVOLD, 1991; SCHULZ, 2003; AUGUSTO, 2003; LIMA, 2007), with logical/semantic outcomes (LEROUX E SCHULZ, 1999; SCHULZ, 2002; 2003)

O fenômeno da factividade, no âmbito da linguística, em sentido amplo, está relacionado à propriedade que certos itens lexicais ou determinados predicadores gramaticais possuem de introduzir um pressuposto, que pode estar implícito ou explícito. No domínio verbal, Kiparsky e Kiparsky (1971) remetem a um conjunto de verbos, os quais admitem uma sentença como complemento e cujo uso pressupõe a veracidade da proposição aí expressa. Em termos aquisicionais, não há consenso acerca da idade em que factividade estaria dominada. Hopmann e Maratsos (1977), por exemplo, propuseram que seu domínio se daria a partir dos 6 anos. Para Abbeduto e Rosenberg (1985), no entanto, isso ocorreria mais cedo, por volta dos 4 anos de idade. Já Schulz (2002; 2003), defende uma aquisição gradual, que se daria por estágios e se estenderia até os 7;0 anos de idade. Léger (2007), por sua vez, afirma que o domínio da factividade, especificamente dos semifactivos, só se daria após os 11 anos. Scoville e Gordon (1979), por fim, propõem que só por volta dos 14 anos a criança seria capaz de dominar a factividade em todos os seus aspectos. Essa falta de consenso corrobora a ideia de uma aquisição gradual, uma vez que esse fenômeno envolve vários aspectos: identificação de uma subclasse de verbos, uma interpretação semântica específica, uma subcategorização sintática variável entre as línguas e um comportamento característico no que diz respeito ao movimento-QU. Esta dissertação tem como objetivo geral contribuir para os estudos sobre aquisição da factividade, particularmente no que diz respeito ao português, debruçando-se mais especificamente sobre dois aspectos pouco explorados na literatura da área: uma questão de variação translinguística, que diz respeito à possibilidade de se admitirem complementos não-finitos factivos em português, e a questão da interpretação de interrogativas-QU em contextos factivos, com propriedades características de ilha fraca. O quadro obtido é discutido frente às análises linguísticas propostas para os verbos/ predicados factivos, que têm considerado uma distinção sintática (KIPARSKY E KIPARSKY, 1971; MELVOLD, 1991; SCHULZ, 2003; AUGUSTO, 2003; LIMA, 2007), com repercussões de ordem lógico/ semântica (LEROUX E SCHULZ, 1999; SCHULZ, 2002; 2003) / In the realm of linguistic theory, the phenomenon of factivity is, in a broad sense, related to the property some lexical items or predicates exhibit of introducing an implicit or explicit presupposition. In the verbal domain, Kiparsky and Kiparsky (1971) assume that factive verbs carry the presupposition that the complement clause they may subcategorize expresses a true proposition. From the acquisition point of view, there is no clear consensus about the age of mastery of the properties of factive sentences. Hopmann & Maratsos (1977) conclude that factive sentences are mastered around age 6. For Abbeduto & Rosenberg (1985), children age 4 have already achieved it. Schulz (2002; 2003) argues for a stepwise acquisition pattern, suggesting stages children pass through up to 7 years old. Léger (2007) adds to Schulzs yet another stage in order to account for some semifactive verbs, for which the right distinction wouldnt be in place before 11 years old. At last, Scoville & Gordon (1979) suggest that only 14 year olds would be able to fully master factivity. This variety of results corroborate the idea of a stepwise acquisition pattern, let alone the different aspects involved in the phenomenon of factivity: the identification of a class of verbs allowing a factive reading, its presuppositional character, interlinguistic variation concerning possible subcategorization frames and a specific behavior as far as extraction in complex sentences is considered. This study aims at contributing for the investigation of the acquisition of factivity in Portuguese, focusing specifically on two underexplored aspects: the possibility of some factive predicates allowing non-finite complements in this language and the extraction patterns in factive complex sentences. The results obtained are discussed in the light of linguistic analyses, which couch on distinct syntactic features assigned to the factive predicates, (KIPARSKY E KIPARSKY, 1971; MELVOLD, 1991; SCHULZ, 2003; AUGUSTO, 2003; LIMA, 2007), with logical/semantic outcomes (LEROUX E SCHULZ, 1999; SCHULZ, 2002; 2003)

[pt] Este estudo diz respeito à aquisição dos complementos pronominais acusativos de terceira pessoa no Português Brasileiro (PB) e no Espanhol Rio- Platense (ER). A dissertação fundamenta-se numa proposta teórica que visa a uma articulação entre teoria lingüística e teorias de processamento no tratamento da Aquisição da Linguagem. A hipótese de trabalho que orientou esta pesquisa é a de que a informação advinda da interface fônica da língua com sistemas de desempenho é processada de forma diferenciada entre as línguas em função das distinções entre os sistemas pronominais. Considera-se que, uma vez que a criança represente complementos pronominais no léxico como um feixe de traços, não haverá distinção entre línguas no que concerne à interpretação semântica e identificação do referente. São relatados dois experimentos. O primeiro faz uso da técnica de escuta preferencial com o objetivo de verificar a sensibilidade de crianças de 12-22 meses adquirindo ER à forma fônica dos clíticos acusativos. O segundo é um estudo contrastivo entre PB e ER que faz uso da técnica de identificação de objetos, com vistas a verificar se crianças de 2 e de 4 anos distinguem o sistema pronominal de sua língua e interpretam informação relativa a gênero/número na identificação do referente de complementos pronominais. Os resultados sugerem que crianças de 18 meses são sensíveis à forma dos clíticos no ER e que crianças de 2 anos são capazes de distinguir os complementos da sua própria língua, ainda que o processamento da referência pronominal apresente dificuldade mesmo aos 4 anos de idade. / [en] This study is about the acquisition of accusative pronominal complements of third person in Brazilian Portuguese (BP) and Rio-Platense Spanish (RS). The dissertation is based in a theoretical proposal that aims for articulation between linguistic theory and processing theory in the study of Language Acquisition. The working hypothesis in this research is that the information coming from the phonic interface between language and performance systems is processed differently in each language, depending on their respective pronominal systems. We also assume that, once a children represents pronominal complements in his lexic as a set of phifeatures, there is no distinction between the two languages regarding semantinc interpretation and identification of the referent. We relate two experiments.The first one uses the headturn preference procedure, aiming to verify the sensibility of 12-22 months old children acquiring RS to the phonic form of accusative clitics. The second is a contrastive study of BP and RS, using the technique of object identification from stimulus sentences, aiming to measure the ability of 2-4 years old children to distinguish the pronominal system of their language and iterpret information relating gender and number in the identification of the referent of pronominal complements.The results suggest that children around 18 months are sensitive to the form of clitics in RS, and 2 years old children are able to distinguish the complements of their own language, although processing the pronominal reference presents difficulties even at age 4. The results are consistent with the hipotesis of this dissertation.

Spanish, as a V(erb)-framed language (Talmy 1985), is expected to lexicalize the path of motion in the verb and manner in some satellite when it comes to the description of motion events. Nonetheless, it shows mixed properties (e.g. Aske 1989, Berman & Slobin 1994). All manner of motion verbs can take a path satellite introduced by the prepositions "hacia" and "hasta", and yet only some can take a path satellite introduced by the preposition "a." I claim that goal XPs introduced by "hasta" and "hacia" are adjuncts, whereas "a" is an argument marker. In order to capture the intermediacy of a verb’s ability to take a goal XP, I classify manner of motion verbs according to a three-way distinction that takes into account whether they encode path categorically, overwhelmingly, or only sometimes, and whether they lexically reject the notion of a goal. Finally, I posit verb coercion—under certain semantic and pragmatic conditions—of manner of motion verbs that strongly or categorically favor displacement in order to express a goal. These semantic/pragmatic influential factors are reduced to (i) degree of manner and (ii) degree of goal-orientedness. / text