Malgré de nombreux efforts de prévention, les jeunes conducteurs sont surreprésentés dans les accidents routiers. Certaines études ont visé à mettre en évidence les facteurs pouvant influencer les jeunes conducteurs à adopter des comportements risqués. La consommation de cannabis et l’impulsivité ont été identifiées comme des facteurs importants. L’objectif de cette thèse vise à mieux comprendre les liens entre la consommation de cannabis et les comportements routiers risqués, tout en tenant compte de l’impulsivité. Pour ce faire, cette thèse se divise en deux articles. Le premier article vise à vérifier si la fréquence de consommation de cannabis prédit la prise de risque des jeunes conducteurs au-delà de l’effet de leur impulsivité. 209 participants âgés de 17 à 25 ans ont rempli des questionnaires sur leurs comportements routiers, leur impulsivité, et leur fréquence de consommation de cannabis. Les résultats montrent que la fréquence de consommation de cannabis prédit la prise de risque des jeunes conducteurs au-delà de l’effet de l’impulsivité. De plus, l’urgence positive est la seule facette de l’impulsivité qui prédit la prise de risque, indépendamment des habitudes de consommation. Plusieurs hypothèses pouvant expliquer ces résultats ont été proposées dont une qui nous semblait particulièrement pertinente : la probabilité de prendre le volant après avoir consommé est plus élevée dans le cas d’une consommation plus fréquente, ainsi l’effet direct de la substance pourrait expliquer les comportements risqués. C’est pourquoi dans notre deuxième étude, nous avons voulu vérifier si la consommation de cannabis était associée aux comportements risqués même lorsque le consommateur n’est pas sous l’effet du cannabis. Comme une consommation fréquente peut être symptomatique d’un trouble d’utilisation du cannabis (TUC), nous avons voulu vérifier son impact sur les comportements risqués. Le deuxième article compare donc un groupe de consommateurs ayant un TUC avec un groupe n’en ayant pas sur des comportements risqués tout en tenant compte de leur impulsivité. Pour ce faire, 76 participants masculins, consommateurs de cannabis, âgés de 18 à 25 ans, ont complété une tâche de simulation de conduite ainsi qu’une tâche stop-signal, s’étant abstenus de 6 consommer du cannabis dans les 12 heures précédant l’expérimentation. Ils ont aussi rempli des questionnaires sur les habitudes de consommation de cannabis, les traits d’impulsivité et la prise de risque. Les consommateurs ayant un TUC ont manifesté plus de comportements risqués dans le simulateur que ceux n’en ayant pas, quel que soit leur niveau d’impulsivité et sans être sous l’effet de la substance. Plusieurs explications ont été proposées : difficulté d’adaptation à la conduite sans l’effet de la substance; présence d’une autre variable confondante que l’impulsivité sous-jacente à la consommation et aux comportements risqués; effet résiduel de la substance, non détecté par la tâche stop-signal, qui influencerait les comportements routiers. En résumé, il ressort de cette thèse que la consommation de cannabis est un facteur contribuant aux comportements risqués des jeunes conducteurs, et ce indépendamment de l’impulsivité. De plus, les consommateurs ne constituent pas un groupe homogène, d’où la pertinence de cibler particulièrement les consommateurs problématiques dans les campagnes de prévention. / Despite many prevention efforts, young drivers are overrepresented in road crashes. Some studies show that cannabis use and impulsivity are significant predictors of risky driving behaviour among young drivers. The aim of this thesis is to better understand the association between cannabis use and risky driving behaviour, while considering the driver’s impulsivity. For this purpose, this thesis is divided into two articles. The first article aims to verify whether the frequency of cannabis use predicts risk-taking over and above the impulsivity traits of young drivers. 209 participants aged between 17 and 25 completed questionnaires on their driving behaviours, impulsivity, and frequency of cannabis use. Results show that the frequency of cannabis use is a significant predictor of risky driving over and above the five impulsivity traits. Furthermore, positive urgency is the only impulsivity trait which predicts risky driving, regardless of the frequency of cannabis use. Several explanations of these results are proposed, including one we found particularly relevant: the probability of driving under the influence is higher with more frequent use, so the substance effects could explain risky driving behaviour. Therefore, in our second study, we wanted to test whether cannabis use was associated with risky driving behaviour even if the user was not driving under the influence. Moreover, since frequent use can be symptomatic of a cannabis use disorder (CUD), we wanted to verify its impact on risky behaviours. The second article, therefore, compares two groups of cannabis users (with or without CUD) on several driving behaviours, while considering their impulsivity. A sample of 76 male participants, cannabis users, aged 18 to 25, completed a driving simulation task and a stop-signal task, abstaining from cannabis use in the 12 hours preceding the experiment. They also completed questionnaires about their cannabis use patterns, impulsivity traits and risk-taking. Results show that users with a CUD displayed more risky behaviours in the simulator than users without a CUD, regardless of their impulsivity level and without being under the effects of the substance. Several explanations have been proposed: difficulty adjusting to driving without the influence of the substance for users with a CUD; presence of a confounding variable different from the impulsivity; or residual effects of cannabis, not detected by the stop-signal task. In summary, this thesis emphasizes that cannabis use is a contributing factor to young drivers’ risky behaviours, regardless of their impulsivity. Moreover, cannabis users are not a homogeneous group, which is why it is important to specifically target problematic users in prevention campaigns.

L’impulsivité est une séquelle fréquente suite à un traumatisme cranio-cérébral (TCC) à laquelle sont associées de nombreuses conséquences néfastes et qui nécessite un investissement considérable de ressources. En ce sens, une évaluation adéquate de l’impulsivité est de mise dans un contexte de réadaptation. Par contre, malgré son importance, il n’existe pas de définition consensuelle de l’impulsivité post-TCC ni de mesure spécifique permettant de l’évaluer. Il est généralement admis, dans la littérature récente, que l’impulsivité est un construit multidimensionnel. Notamment, le modèle UPPS-P de l’impulsivité gagne un appui significatif et pourrait permettre une compréhension plus spécifique de l’impulsivité post-TCC. Selon ce modèle, il existe quatre dimensions à l’impulsivité soit l’urgence (tendance à agir ses impulsions dans un contexte d’émotions intenses), le manque de persévérance (difficulté au niveau du maintien de l’attention sur une tâche complexe et ennuyante et une susceptibilité à l’ennui), le manque de préméditation (difficulté de prévoir les conséquences d’un comportement avant de le poser) et la recherche de sensations (tendance à préconiser des activités jugées excitantes et l’ouverture à essayer de nouvelles expériences qui peuvent ou non, être dangereuses). Il a été proposé que l’urgence, le manque de persévérance et le manque de préméditation sont associés à des difficultés à inhiber la réponse automatique, à résister à l’interférence proactive et de la prise de décision, respectivement (Bechara et Van der Linden, 2005). Une telle conceptualisation offre une avenue prometteuse quant à l’évaluation de l’impulsivité post-TCC. Le présent projet vise à clarifier le construit de l’impulsivité post-TCC, à déterminer si les mêmes mécanismes cognitifs sont en lien avec les dimensions de l’impulsivité dans un contexte de réadaptation fonctionnelle intensive puis de déterminer quelles tâches de performance prédisent le mieux les comportements impulsifs dans ce milieu. D’abord, une recension des écrits portant sur l’impulsivité post-TCC donne un appui à la conceptualisation multidimensionnelle de l’impulsivité et fait ressortir les obstacles qui nuisent à l’étude de l’impulsivité post-TCC. Ensuite, l’utilisation de diverses tâches de performance permet d’évaluer le lien entre les dimensions de l’UPPS-P et les mécanismes cognitifs. Les résultats indiquent des atteintes sur les mécanismes liés à l’inhibition de la réponse automatique, à la résistance à l’interférence proactive ainsi qu’à la prise de décision. Toutefois, ils ne permettent pas de supporter les propositions de Bechara et Van der Linden quant aux mécanismes sous-jacents aux dimensions de l’impulsivité post-TCC chez les patients en réadaptation intensive. Finalement, les résultats permettent de faire ressortir la pertinence des tâches de performance écologiques dans la prédiction de comportements impulsifs dans la vie quotidienne. Les portées théoriques et cliniques des résultats sont discutées. / Impulsivity is a common sequela following traumatic brain injury (TBI) to which are associated many negative consequences and necessitates important resources. A thorough assessment of impulsivity is therefore necessary in a rehabilitation setting. However, there is no consensual definition of post TBI impulsivity nor is there a specific measure allowing its assessment. It is generally acknowledged, in recent literature, that impulsivity is a multidimensional construct. The UPPS-P model is gaining a significant amount of support and could allow a better understanding of post-TBI impulsivity. According to this model, there are four dimensions to impulsivity, namely urgency (tendency to experience and act on strong impulses frequently under conditions of strong affect), lack of perseverance (inability to remain focused on a task that may be boring or difficult), lack of premeditation (inability to think and reflect on the consequences of an act before engaging in that act) and sensation seeking (tendency to enjoy activities that are exciting and a willingness to try new experiences). It has been suggested that urgency, lack of perseverance and lack of premeditation are linked to impairments on prepotent response inhibition, on resistance to proactive interference and on decision making, respectively (Bechara and Van der Linden, 2005). This conceptualisation offers a promising avenue as to the assessment of post-TBI impulsivity. This project aims to clarify the construct of post-TBI impulsivity, to determine whether the same cognitive mechanisms come into play in the different dimensions of impulsivity in an intensive functional rehabilitation setting and to determine which performance tasks allow the prediction of impulsive behaviors in that setting. Firstly, a literature review among studies on post-TBI impulsivity gives support to a multidimensional conceptualisation of impulsivity and allows to bring out the obstacles which make the study of post-TBI impulsivity more complicated. Secondly, the use of different performance tasks is used to assess the links between UPPS-P dimensions and cognitive mechanisms. Results indicate impairments on the mechanisms linked to prepotent response inhibition, to resistance to proactive interference and to decision making. However, they do not support Bechara and Van der Linden’s (2005) propositions as to the underlying mechanisms to the dimensions of post-TBI impulsivity in an acute rehabilitation setting. Thirdly, the results show the relevance of ecological performance tasks as to the prediction of impulsive behaviors in everyday life. The theoretical and clinical implications of the results are discussed.

殺人犯罪是所有犯罪類型中嚴重性被評為最高的罪行,也最令社會大眾與媒體關切.國內對殺人犯罪的研究仍少,而且主要是以問卷的形式進行.為了對此一現象做另一種方式的初步探討,研究者以台中監獄中刑期十年以上與無期徒刑的殺人犯為對象,研究中以「失抑量表」、「社會化量表」與「社會病態量表」來瞭解殺人犯的心理病態（psychopathy）的程度,並根據其在「失抑量表」得分的高低而分為組一與組二兩組.Rorschach墨漬測驗則用來探討他們的客體關係（object relations）能力的差異,同時也呈現出兩組在Exner系統中描述性變項上的統計結果.研究者除了採用Blatt等人的量表來對受刑人的Rorschach protocol進行計分外,並根據客體關係理論,結合Blatt與Urist的量表而發展出一套新的客體關係量表. 研究結果支持殺人犯可以依其心理病態的程度做進一步的區分,而且不同的心理病態程度可以對應到不同的客體關係能力.最後,研究中分析了新量表的有效性. 第一章 緒論-第1頁 第一節 研究背景-第1頁 第二節 反社會行為的異質性-第3頁 第三節 心理病態的生理、心理與行為特徵-第11頁 第二章 本研究的相關理論、研究與研究目的-第21頁 第一節 Kernberg的客體關係理論-第21頁 第二節 Rorschach測驗的本質-第28頁 第三節 Human Contents與客體關係-第32頁 第四節 M反應與客體關係-第33頁 第五節 客體關係理論的研究取向與批評-第38頁 第六節 研究工具的編製與研究目的-第48頁 第三章 研究方法-第56頁 第一節 受試、工具與程序-第56頁 第二節 資料分析-第60頁 第四章 結果-第66頁 第五章 討論-第80頁 附註-第83頁 參考文獻-第85頁 Notes-第97頁 附錄一 相互自主性量表-第98頁 附錄二 Rorschach互動量表-第100頁 附錄三 客體概念的發展分析-第101頁 附錄四 失抑量表、社會化量表與社會病態量表-第112頁 附錄五 信度計分表一-第115頁 附錄六 信度計分表二-第116頁 附錄七 信度計分表三-第117頁 / The seriousness of criminal homicide is evaluated as the highest among all crimes, and receives the most concern from the public and mass media. There is still few researches on criminal homicide in Taiwan, and the major study tools are questionnaires. In order to investigate this phenomenon from a different perspective, the researcher selected the homicides in Taichung prison who get a 10-year sentence or life sentence as his subjects. In this study, "Disinhibition Scale", "Socialization Scale", and "Sociopathy Scale" were applied to understand the psychopathy level of the homicides, and subjects are divided into two groups according to their scores on the "Disinhibition Scale". Rorschach inkblot test was selected to investigate their different capacity for object relations, meanwhile presented the descriptive statistics of Exner's Comprehensive System for both groups. Besides scoring subjects' Rorschach protocols on the scale developed by Blatt et al., the researcher intergrated Blatt's and Urist's scales on the basis of object relations theory into a new object relations scale. The results of this stydy provide suppport for the hypotheses that homicides can be differentiated from each other on the basis of their psychopathy level, and different levels of psychopathy reflect different capacity for object relations. Finally, the utility of the new scale is analyzed and discussed.

The thesis is focused on the specifics of the social service called low-threshold facility for children and youth and how the virtual communication can be used to work with the clients of the service. In the theoretical part the low-threshold facilities for children and youth, range, principles and target audience of this social service are described. Also function and purpose of communication is described and the specifics of mobile and virtual communication are characterised. The possibilities how to use the mobile and virtual communication in basic and special social consultancy are another topic. The practical part is focused on mapping how the area of Czech Republic is covered with the facilities supplying the social service called low-threshold facility for children and youth. It also includes a survey research reflecting actual practise in using the virtual communication as a tool when working with clients in these facilities. In current facilities mainly e-mail and Facebook social network are used sometimes also Skype, ICQ application and other social networks. Current practise is very diverse because a complex professional methodical basis to supply this service model is still missing.

MA (Sociology) / Department of Sociology / The use of social media has in the last decade become popular among students in Institutions of Higher Learning (IHL). Social relationships and communications among students mostly take place on social networks. However, because of their growing popularity abuse is also increasing on these social media platforms. Female students are particularly vulnerable to sexual harassment and other forms of abuse on these platforms. This study explored the experiences of online sexual harassment among female students at a selected Institution of Higher Learning (IHL) in South Africa. This was to gain insights into the extent to which female students in institutions of Higher Learning are affected by this phenomenon. In particular, the study sought to find out the different forms of online sexual harassment experienced by female students in IHL, the specific types of online platforms where this sexual harassment take place, and the coping strategies employed by these students to cope with online sexual harassment. To address these objectives, the study adopted a qualitative exploratory design which allowed understanding of these experiences through the eyes of the victims. Twenty female participants were used for the study, while semi structured interviews were employed to collect data from these individuals. Purposive and critical case sampling technique was used to identify female students who had experienced sexual harassment online in the IHL. Findings reveal that sexual harassment at the IHL has occurred mostly in the form soliciting and sending of inappropriate pictures and videos to the victims. The study also revealed that the two main platforms on which sexual harassment of female students took place were WhatsApp and Facebook. While the main strategies of coping with online sexual harassment were blocking of harassers and complete disregard of the harassers. / NRF

在網路世界中，人們以匿名表達意見遠比現實生活中更為容易，這件事已劇烈地改變了匿名言論的量與質。從好的面向看，匿名帶來自主，讓異議者可以透過網路匿名，表達可能永遠都不敢在眾人面前說出來的真正想法，讓觀念市場變得多元豐富；另一方面，匿名提高了追究責任的困難。相較於現實世界的言論，損害他人或構成犯罪的惡質網路匿名言論，將造成影響更深遠且永久的傷害。 　　目前，關於網路匿名言論的管制方式，世界各國政府都是仰賴「事後追懲模式」和「實名認證模式」的其中一種。前者是網路使用者原則上可以匿名地發表言論，但如果發表不當言論並造成傷害，受害者或國家可以揭露其身份以對其展開司法追訴；後者是網路使用者在張貼言論前，必須先向國家機關指定的網路業者交出個人真實身份資料以進行驗證後，才能匿名發言，或甚至完全禁止以匿名方式發言，讓網路使用者感受到被眾人監督的壓力，不敢發表不當內容。 　　本文主張，網路匿名言論是受到憲法所保障的權利，而「事後追懲模式」相較於「實名認證模式」，較能調和不同權利間的衝突。不過，儘管我國政府採取此模式，卻在設計民刑事訴訟制度時，漏未導入匿名言論權利的思考，導致網路匿名表意者一經策略性訴訟攻擊，真實身份就會立即暴露，使得匿名表意自由不過徒有虛幻表象。因此，本文建議，為落實對匿名言論自由的保護，立法者宜參考美國法，修改部分訴訟法來處理此問題。 / On the internet, people can express themselves anonymously far easier than in the physical world. This fact has dramatically changed both the quantities and qualities of anonymous speech. On the bright side, anonymity brings more autonomy. Dissenters can express their real opinions, which they might never have the courage to speak out in public. It, in turn will promote the diversity and integrity of the marketplace of ideas. Yet, anonymity also makes it more difficult to hold the speakers accountable. In addition, compared to speech in the real physical world, malicious online anonymous speech will cause more serious permanent harms. 　　Today, governments around the world are either relying on the “Ex Post Compensation and Punishment” approach or the “Real-Name Verification System” to regulate online anonymous speech. Under the former approach, internet users can express their opinions anonymously, but if the content of their speech is malicious and causes damages to other people, the victim can seek disclosure of the speaker’s identity in order to take legal actions against the speaker. In contrast, under the latter system, internet users have to provide their personal information (real identities) to the ISPs or ICPs appointed by governments and complete the verification process before they can post their words. Some real name systems go even further by banning anonymous speech completely. By making users feel like they are being supervised by the public, the real name system wishes to deter indecent contents 　　This thesis argues that online anonymous speech is protected by the Constitution, and the ‘Ex Post Compensation and Punishment’ is a preferred approach because it can better balance the conflicting rights. In Taiwan, although the government has chosen the ‘Ex Post Compensation and Punishment’ approach, current civil/criminal procedural laws and practices afford little protection to online anonymous speakers. The plaintiff, who is allegedly harmed by the anonymous speech, can easily bring a “Strategic Lawsuit,” with the sole purpose of obtaining the identity of the online anonymous speaker. Consequently, this thesis suggests that, in order to better protect the freedom of anonymous speech, the legislators of Taiwan should refer to U.S. laws and practices and revise several provisions of Taiwan’s Code of Civil Procedure and Code of Criminal Procedure.