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Language is arguably one of the most salient features that distinguish humans from other animal species. However, despite the existence of a large body of relevant theoretical and empirical research, there is currently no consensus as to why language emerged exclusively in the human species or how it evolved its unique communicative structure. In this thesis, I therefore take a multi-pronged approach to analysing and testing several different hypotheses for the biological function and evolution of language. In Chapter I, I review the evidence and theoretical arguments for each of these proposals and provide, in place, a synthetic perspective which integrates or eliminates each of these ostensibly competing hypotheses for the biological function of language. In Chapter II, I employ the first experimental test of the interdependence hypothesis: the unique proposal offered to explain the emergence and potential coevolution of language and cooperation in the human species. In pursuit of this experiment, I employed a cooperative social foraging task using small and large groups to determine what factors enable individuals to make sense of information from others and converge upon a group consensus. In Chapter III, I take an experimental approach to determine whether aspects of human language can be characterised in terms of honest signalling theory. In this respect, I test several different proposals predicted by the sexual selection and deception hypotheses for human language function. In Chapter IV, I divert attention away from biological function to focus more closely on language structure. More specifically, I take an experimental approach to the problem of how and indeed whether recursive syntax evolved to be a consistent feature of human language. In pursuit of this experiment, I utilized the Imposing Memory Task (IMT) and a recursive syntax measure, to determine relative performance on each of these cognitive tasks, thereby testing whether recursive syntax may have evolved in tandem with higher-order intentionality (also known as embedded mindreading). Finally, in Chapter V, I discuss the results and implications of these experiments, and possible suggestions for future studies.

Comment vivre ensemble ? Molière nous divertit à la fois en peignant les mœurs de son temps et en donnant à réfléchir à cette question. La civilité est une de ses réponses. Elle fleurit au XVIIe siècle, où les « honnêtes gens » suivent les traités qui enseignent les bonnes manières et cherchent à plaire et à rendre la société mondaine plus raffinée. La civilité camoufle délibérément les différences entre les personnes et les rangs, et donne délicatement une place à tout le monde dans la société. Mais cette civilité est en même temps dénoncée comme une forme d’hypocrisie et comme un masque qui dissimule la violence. Peut-on mieux vivre ensemble en refusant d’adopter ce comportement civil ? En principe, la civilité doit servir à éviter le recours à la violence. Mais civilité et violence peuvent aussi se rejoindre, car la violence n’est pas forcément physique : elle peut prendre la forme d’agressions verbales ou morales, de moqueries et de discriminations. Notre objectif est donc avant tout de comprendre ce en quoi consistent civilité et violence par le truchement des personnages de Molière, puis d’analyser les rapports que la civilité entretient avec la violence, et enfin de découvrir la proposition de Molière pour mieux vivre ensemble en couple et en société. / How to live together? Molière entertains us by depicting the customs of his age and by giving pause to reflect on this issue. Civility is one of his answers. It bloomed in France during the 17th century when the "honnête homme" complied with the rules of guide books teaching good manners and strove to please and make the smart society more refined. Civility deliberately conceals the differences between people and ranks, and delicately includes everyone in society. Meanwhile civility is denounced as a form of hypocrisy and as a mask concealing violence. Could we live better together by rejecting this civil behavior? Civility ought to be used to avoiding violence. But civility and violence can overlap as well, as violence is not necessarily physical violence: it can also result in verbal and moral abuse, derision and discrimination. The aim of this dissertation is to first understand what civility and violence involve through the characters of Molière, then to analyze the relation between civility and violence, and eventually to find out Molière’s insights to better live together as couples and as a society.

Para avaliar a quantidade ótima de energia e recursos a ser investida em reprodução, um animal deve não só acessar informações sobre sua própria condição corporal, como acessar também informações sobre coespecíficos presentes no ambiente em que vive. Este trabalho investigou essas duas vias (endógena e exógena) de obtenção de informação. Utilizando como organismo modelo a aranha Paratrechalea ornata (Trechaleidae), uma espécie em que os machos produzem presentes nupciais, este estudo investigou: (a) se machos investem mais tempo de busca quando na presença de pistas químicas de fêmeas virgens; (b) se machos aumentam ou diminuem o investimento na produção do presente nupcial quando há pistas da presença de machos competidores; (c) se restrições alimentares impõem efeitos de curto e longo prazo sobre o comportamento de construção de presentes nupciais. Machos mostraram preferência por locais com pistas da presença de fêmeas, mas não diferenciaram pistas de fêmeas virgens e copuladas. Diante de pistas da presença de um macho competidor, machos produziram presentes de menor qualidade, com menos seda. Por fim, restrições alimentares provocam efeitos de curto e longo prazo no comportamento reprodutivo dos machos, diminuindo a frequência de produção do presente nupcial e o tamanho do presente construído. Conjuntamente, os três experimentos realizados mostram que machos de P. ornata utilizam tanto informações exógenas quanto endógenas para ajustar seu investimento em reprodução. A combinação das informações obtidas deve aumentar a eficiência no gasto de energia, maximizando o sucesso reprodutivo dos machos sem que isso prejudique a manutenção de seu organismo / To evaluate the optimal amount of energy and resources to be invested in reproduction, animals should not only obtain information about their own body condition, but they should also obtain information about conspecifics in the environment where they live. This study investigated these two ways (endogenous and exogenous) of acquiring information. Using as model organism the spider Paratrechalea ornata (Trechaleidae), a species in which males produce nuptial gifts, this study investigated: (a) if males invest more time searching for sexual partners in the presence of chemical cues of virgin females; (b) if males increase or decrease the investment in nuptial gift construction in the presence of chemical cues of competitor males; (c) if food deprivation imposes short- and long-term effects on nuptial gift construction. Males showed a preference for sites with cues of females, but they did not discriminate cues of virgin from cues of copulated females. When males detected cues of a male competitor, they produced lower quality gifts, with less silk. Finally, food deprivation imposed both short- and long-term negative effects on male reproductive behavior, decreasing the frequency of nuptial gift construction and also the size of the gift. Together, the three experiments show that males of P. ornata use both exogenous as endogenous information to adjust their investment in reproduction. The combination of information obtained may increase the efficiency in energy use, maximizing male reproductive success without compromising self maintenance

Para avaliar a quantidade ótima de energia e recursos a ser investida em reprodução, um animal deve não só acessar informações sobre sua própria condição corporal, como acessar também informações sobre coespecíficos presentes no ambiente em que vive. Este trabalho investigou essas duas vias (endógena e exógena) de obtenção de informação. Utilizando como organismo modelo a aranha Paratrechalea ornata (Trechaleidae), uma espécie em que os machos produzem presentes nupciais, este estudo investigou: (a) se machos investem mais tempo de busca quando na presença de pistas químicas de fêmeas virgens; (b) se machos aumentam ou diminuem o investimento na produção do presente nupcial quando há pistas da presença de machos competidores; (c) se restrições alimentares impõem efeitos de curto e longo prazo sobre o comportamento de construção de presentes nupciais. Machos mostraram preferência por locais com pistas da presença de fêmeas, mas não diferenciaram pistas de fêmeas virgens e copuladas. Diante de pistas da presença de um macho competidor, machos produziram presentes de menor qualidade, com menos seda. Por fim, restrições alimentares provocam efeitos de curto e longo prazo no comportamento reprodutivo dos machos, diminuindo a frequência de produção do presente nupcial e o tamanho do presente construído. Conjuntamente, os três experimentos realizados mostram que machos de P. ornata utilizam tanto informações exógenas quanto endógenas para ajustar seu investimento em reprodução. A combinação das informações obtidas deve aumentar a eficiência no gasto de energia, maximizando o sucesso reprodutivo dos machos sem que isso prejudique a manutenção de seu organismo / To evaluate the optimal amount of energy and resources to be invested in reproduction, animals should not only obtain information about their own body condition, but they should also obtain information about conspecifics in the environment where they live. This study investigated these two ways (endogenous and exogenous) of acquiring information. Using as model organism the spider Paratrechalea ornata (Trechaleidae), a species in which males produce nuptial gifts, this study investigated: (a) if males invest more time searching for sexual partners in the presence of chemical cues of virgin females; (b) if males increase or decrease the investment in nuptial gift construction in the presence of chemical cues of competitor males; (c) if food deprivation imposes short- and long-term effects on nuptial gift construction. Males showed a preference for sites with cues of females, but they did not discriminate cues of virgin from cues of copulated females. When males detected cues of a male competitor, they produced lower quality gifts, with less silk. Finally, food deprivation imposed both short- and long-term negative effects on male reproductive behavior, decreasing the frequency of nuptial gift construction and also the size of the gift. Together, the three experiments show that males of P. ornata use both exogenous as endogenous information to adjust their investment in reproduction. The combination of information obtained may increase the efficiency in energy use, maximizing male reproductive success without compromising self maintenance

Depuis 157 ans et la publication originelle de la théorie de l’évolution par sélection naturelle de Charles Darwin, ce concept n’a cessé d’évoluer. Un principe fondamental suggère que des traits handicapants aient évolués dans la mesure où ils informent de manière honnête les congénères sur la qualité intrinsèque du porteur. Le manchot royal est un modèle exceptionnel permettant de tester la valeur sélective de ce signal dans un contexte sexuel et social (non-reproductif). Mes résultats suggèrent que l’apparition et le maintien de certains de ces traits au cours de l’évolution se sont opérés sous l’influence de la sélection sexuelle et d’un choix mutuel du partenaire, tandis que d’autre, non contraint par la condition fluctuante de l’individu, aurait évolué sous l’influence de la sélection sociale. Ce travail de recherche participe à la compréhension des mécanismes impliqués dans l’évolution de signaux coûteux, et à la nature des bénéfices ultimes que ces traits procurent. / Darwin’s seminal theory of evolution by means of natural selection, first published 157 years ago, has been in constant refinement ever since. The production and maintenance of extravagant ornaments is widely suggested to evolve by conspecific preference providing information on individual intrinsic quality in sexual contexts or on individual social quality in non-reproductive contexts. The king penguin is a monomorphic bird species and an outstanding model to study ornament evolution. My results show that those ornaments are partly condition-dependent, and reliable traits that may be used to assess the quality of a potential sexual partner, implying that their evolution and maintenance is partly determined by sexual selection. On the other hand, some traits remained condition-independent in their production, suggesting that the cost associated with their expression was deferred over time and the evolution of those ornaments likely shaped by non-sexual social selection.

This thesis studies how scientists and science were put to use in the passing of the 1962 Water Fluoridation Act. The law was created for a specific purpose: that of facilitating the continuation of the water fluoridation trials that had been under way in Norrköping until January 1962, when they were forced to cease, having been deemed illegal by the Supreme Administrative Court.  By studying the network of scientists who were either directly involved in or explicitly supportive of the Norrköping trials, and their actions as members of the two expert committees formed in the 1950’s by the Royal Board of Medicine, and which would come to greatly influence the legislative process, the thesis examines how personal and research interests transferred from Norrköping into the issue of nationwide fluoridation.  Using analytical tools gathered from Roger Pielke Jr. and Daniel Sarewitz, the thesis utilizes the concept of uncertainty to describe how scientists, in the political process, assumed different roles in order to further the cause of fluoridation on the one hand, but also to maintain an ideal image of the relationship between science and politics. Furthermore, the tension within the concept of scientization is examined, illuminating how the political end result - the law - is made possible by means of a balancing act between science’s claims to objective truth and the value-driven, often ethically charged discourse of politics.   Fianlly, the case of fluoridation is placed in the context of the welfare state and the public health project, where it emerges as a part of a broader political and societal renegotiation of the relationship between the individual and the state, which I argue was taking place in Sweden during ”the long fifties”. / Uppsatsen studerar hur forskare och vetenskap kom till användning i skapandet av 1962 års Lag om tillsättande av fluor till vattenledningsvatten. Lagen kom till med ett specifikt syfte, nämligen att möjliggöra för en fortsättning av de försök med fluoridering av dricksvatten som hade pågått i Norrköping fram till januari 1962, då de tvingats att upphöra efter att ha bedömts som olagliga av Regeringsrätten.  Genom att studera det nätverk av forskare som knöts till Norrköpingsförsöken, antingen som direkt involverade eller som förespråkare, och hur dessa agerade som medlemmar av de två expertkommittéer som tillsattes av Medicinalstyrelsen för att utreda frågan om fluoranvändning i kariesförebyggande syfte, vilka kom att utöva ett betydande inflytande på lagstiftningsprocessen, undersöker uppsatsen hur forsknings- och personliga intressen överfördes från Norrköping till frågan om rikstäckande vattenfluoridering.  Med hjälp av analytiska verktyg hämtade från Roger Pielke Jr. och Daniel Sarewitz, tar uppsatsen fasta på begreppet osäkerhet för att beskriva hur forskarna i den politiska processen antog olika roller, i syfte att dels främja fluorideringen som sådan, men också att upprätthålla rådande ideal om relationen mellan vetenskap och politik. Vidare undersöks spänningen i den process som Roger Pielke kallar scientization, och hur det politiska slutresultatet - lagen - blev verklighet till följd av en balansgång mellan vetenskapens anspråk på objektiv sanning och politikens värderingsdrivna och ofta etiskt färgade diskurs.  Slutligen placeras fallet med vattenfluorideringen i välfärdsstatens och folkhälsoprojektets kontext, där det framträder som en del av en bredare politisk och samhällelig omförhandling av relationen mellan individ och samhälle, som jag menar ägde rum i Sverige under ”det långa femtiotalet”.

This thesis investigates the role of prior use in common and statutory trade mark law. In the United States a pertinent requirement is priority of use. In the United Kingdom and South Africa, a reputation must be present. In the United Kingdom a plaintiff is required to have goodwill in the country, but in the United States and South Africa it is not required. The conception of a mark does not qualify for protection. It is not required that a business must have actually entered the market. In the United States the general approach is that a plaintiff will not receive protection in a remote area, but regard must be had to zones of natural expansion. British and South African law is the same, and protection may be obtained in areas where there is no trading. Where a dual reputation exists, neither party will be able to act against the other. The mere fact that the user of a mark was aware of the use thereof by another person, does not exclude protection. A trade mark application can be opposed on the basis of another application, combined with use of a mark, or on the ground of prior use. In some instances the fact that a mark has been filed will influence the burden of proof. In general, a registration can be expunged on the same grounds as would constitute grounds of opposition. The concurrent use of a mark can form the basis for the registration of a mark. In the United States, the use must have taken place prior to the filing date of the other party, but in the United Kingdom and South Africa, prior to the own filing date. In the latter two countries, knowledge of a mark is not necessarily exclusionary. Prior use is generally accepted as a defence to an infringement action. It is, however, noted that in various countries, it is only use prior to the relevant date that will be protected, and there is not necessarily a right to extend the scope of use concerned. / Mercantile Law / LL.D. (Mercantile Law)

The purpose of this study was to examine the self-perception of leadership styles of practicing female superintendents in Texas and how their preferred leadership style affected their performance. The study posed the following questions:(1) What are the preferred leadership styles of the practicing female superintendents in Texas as measured by Bolman & Deal’s (2003) four frames of leadership? (2) What are the predominant behaviors that female superintendents in Texas identify within each frame of leadership? (3) How do the preferred leadership styles and behaviors influence the superintendents’ every day performance? This study was relied on a mixed method approach, quantitative and qualitative. The quantitative component involved surveying 50 female superintendents, using the Leadership Orientations (Self-Report) survey (Bolman & Deal, 1990). The qualitative component included a semi-structured interview which asked follow up questions with six selected female superintendents (two from rural, two from suburban, and two from urban districts) who consented to the interview regarding the influence of their leadership preferences. The findings suggest participants’ preferred leadership style relates to the Human Resource frame which include: being an inspirational leader, utilizing interpersonal skills, making good decisions; as well as, coaching and developing people. Findings also suggest that predominant behaviors include: supporting others, building trusting relationships through collaboration, and being participative. The preferred leadership styles and behaviors’ influence on female superintendents’ everyday performance resulted in embracing collaboration, being transparent, sharing a vision, being passionate, and building trusting relationships. Additionally, beliefs and behaviors that lead to success include: being honest, depersonalize the situations, education makes a difference, adopt flexibility, and power to make decisions. The characteristics that lead to success are: being spiritual, being organized, being committed, and willing to help others. Furthermore, the following advice was offered: learn to cope with high level of visibility, become knowledgeable of the district’s needs and characteristics, and develop a professional image. Finally, implications for aspiring female superintendents, superintendent preparation programs and school boards members are also presented. / text

This thesis investigates the role of prior use in common and statutory trade mark law. In the United States a pertinent requirement is priority of use. In the United Kingdom and South Africa, a reputation must be present. In the United Kingdom a plaintiff is required to have goodwill in the country, but in the United States and South Africa it is not required. The conception of a mark does not qualify for protection. It is not required that a business must have actually entered the market. In the United States the general approach is that a plaintiff will not receive protection in a remote area, but regard must be had to zones of natural expansion. British and South African law is the same, and protection may be obtained in areas where there is no trading. Where a dual reputation exists, neither party will be able to act against the other. The mere fact that the user of a mark was aware of the use thereof by another person, does not exclude protection. A trade mark application can be opposed on the basis of another application, combined with use of a mark, or on the ground of prior use. In some instances the fact that a mark has been filed will influence the burden of proof. In general, a registration can be expunged on the same grounds as would constitute grounds of opposition. The concurrent use of a mark can form the basis for the registration of a mark. In the United States, the use must have taken place prior to the filing date of the other party, but in the United Kingdom and South Africa, prior to the own filing date. In the latter two countries, knowledge of a mark is not necessarily exclusionary. Prior use is generally accepted as a defence to an infringement action. It is, however, noted that in various countries, it is only use prior to the relevant date that will be protected, and there is not necessarily a right to extend the scope of use concerned. / Mercantile Law / LL.D. (Mercantile Law)