This study explores factors that influence condom use decision-making of adolescents from two schools in the Western Cape, South Africa. Thematic analysis was used to analyse the data generated from 16 individual semi-structured interviews. When exploring the factors that influence adolescent’s condom use decision-making, sexual debut and the role that emotion plays in the decision-making process were frequently discussed. The themes which emerged for sexual debut included relationships were about displaying true love which was equated with having sex and respecting parents’ expectations and rules informing decisions not to have sex at this age. When exploring the themes which emerged for condom use decision-making, the adolescents spoke about their concerns for the future and organising their lives. In addition, anticipated fear about falling pregnant, becoming parents and being infected with a disease emerged when exploring adolescent condom use decision-making. Understanding adolescent condom use can assist in aligning sexual and reproductive health (SRH) interventions and supporting healthy SRH decision-making and healthy relationships for adolescents.

Backpacker tourists frequently express “anti-tourist” attitudes and are confident that they contribute positively to their destinations. Ironically, they are sometimes characterised by stakeholders in destinations in less developed countries as neo-colonial invaders. In spite of their anti-tourist attitudes, in reality, backpacker tourists tend to stay in backpacker enclaves where the cultural and moral values of backpackers are dominant. This happens because they encounter many obstacles to enjoying the backpacking experience in an unfamiliar interregional (intercultural) environment. Given such contradictory phenomena surrounding backpacker tourists in less developed countries, one question is how they manifest their responsible behaviour. Therefore, this research aims to explore the nature and degree of responsible behaviour amongst backpacker tourists in Thailand, which is one of the most popular backpacker destinations in the world. Through mixed method research, this principally explores (1) the frequency levels of backpackers’ behavioural intentions, their actual responsible behaviour, and the gap between them based on a series of items representing responsible behaviour, and (2) their definitions and perceived experiences of responsible behaviour. The research found that whilst backpacker tourists tend to report their frequent responsible behaviour and perceive themselves as “responsible” tourists, in reality, they experience many difficulties in behaving responsibly in an unfamiliar interregional (intercultural) tourism setting in spite of their intention to do so, and while being well aware of the importance of behaving responsibly. There is a propensity among backpacker tourists to exaggerate the importance of small and fleeting experiences of responsible behaviour outside backpacker enclaves (e.g. a moment of demonstrating a respectful attitude towards local people). Also, cultural experiences within backpacker enclaves, which are staged authentic manner (e.g. participation in a cultural or cookery class), tend to be exaggerated in importance and regarded as highly responsible behaviour. Moreover, whilst backpacker tourists appreciate themselves as “responsible” tourists and during their travels they respect others and behave so as not to disturb others which are required to do so regardless of place, culture and custom even in the home in daily life, they represented their reluctance to “engage” in responsible behaviour, especially altruistic and philanthropic activities (i.e., engagement in volunteering work or donating to local communities). These propensities were common to all types of backpacker tourists in this study; even those who reported their own outstandingly frequent intention and actual responsible behaviour (i.e., backpacker tourists who travel extensively with the strong motivation to explore destination countries). The principal conclusion in this research is that, whilst the behaviour reported by the backpacker tourists was never harmfully irresponsible, there are several contradictions between their evaluation of their responsible behaviour and their actual behaviour patterns. Moreover, there is a gap between their behavioural pattern of responsible behaviour and the concept of “responsible tourism” for backpacker tourists. The declared good intentions and instances of actually behaving in a responsible manner by backpacker tourists do not necessarily mean that they behave altruistically and philanthropically that the concept of responsible tourism aims to engender.

Theories of emotion see affective processes as important in guiding behaviour, and social/cognitive theories have implicated cognitive appraisals in a motivational context. The control-value theory combines these approaches, predicting that high levels of expectancy and control lead to associated levels of anticipatory affect in those approaching a goal. This theory, combined with literature on approach motivation in depression, led to the proposed model of the effect of depression on behavioural striving, and subsequent levels of depression. The current study aimed to test this model. Sixty participants completed measures of depression, approach-related affect, cognitive appraisals and striving behaviour in relation to their own personal goals, with follow-up measures of depression and striving behaviour completed two weeks later. They also participated in an experimental manipulation of approach-related cognitive appraisals. The model received mixed support, with strongest evidence for the proposed pathway from depression to anticipatory affect via cognitive appraisals, especially for those who were at least mildly depressed. However contrary to the model, depression was not found to be associated to striving, and no variables other than depression predicted future depression. The study was conducted with a non-clinical population, there was reduced power at follow-up, and the experimental manipulation may have been unsuccessful. This study provided preliminary support for the new model, and although findings were mixed, future research may be more conclusive. Findings suggest that therapy specifically tapping into approach-related cognitive appraisals, as well as approach-related affect, may be therapeutically beneficial in working with depression.

From all the species that arrive to a novel environment, very few manage to form a viable population. The guppy, a very successful invader, is a highly social species that performs some of its vital tasks (e.g., foraging, avoiding predators) in groups. This thesis aimed to quantify heterospecific association benefits that enhance invasion success. Interactions between invaders and natives could be one of the environmental characteristics of a place that increase its risk of invasion. I evaluated the tendency of an invasive species to associate with native individuals with similar ecological requirements. I tested the hypothesis that invaders gain exploring, acquisition of information and foraging benefits when socializing with natives. In these experiments I used the guppy as the invasive model species and endangered native Mexican topminnows (Poeciliopsis infans, Skiffia bilineata, Ameca splendens, Zoogoneticus tequila, Xenotoca eiseni and Girardinichthys viviparous). I found that guppies shoal with other species in Trinidad (Poecilia picta and Poecilia sphenops), where they are native (Chapter 2) and that this trait remains when they are invasive (Chapter 3). Guppies are equally willing to explore novel environments when accompanied by heterospecifics or conspecifics. Guppies are more willing to explore complex environments than simple ones. Moreover, when exploring simple environments they have a higher association tendency, regardless of the partner' species (Chapter 4), which could lead them to acquire the benefits of grouping behaviour and avoid Allee effects - the disadvantages of being part of a small group. In the contexts in which they were tested guppies gained as much information by associating with heterospecifics as with conspecifics (Chapter 5). Finally, I found that when shoaling in bigger shoals guppies are able to locate food faster and spent more time foraging. The benefits of increased shoal size were maintained when the additional guppies were replaced with heterospecifics. However, they derive more benefits from the species they are more willing to associate with (Chapter 6). These results uncover a mechanism enabling founding individuals to survive during the most vulnerable phase of an invasion and help explain why guppies have established viable populations in many parts of Mexico as well as in every continent except Antarctica.

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This study investigated the effectiveness of the Triple P Programme to reduce stealing behaviour in three preadolescent children. Using behavioural monitoring and self-report questionnaires, outcome measures included stealing behaviour, parenting practices, parenting efficacy, and parental mental health. A measure of change was also included to identify change points in the therapeutic process. Results suggest that parent training is effective in the reduction of stealing behaviours, as positive changes were found across all the measures employed. This early intervention has the potential to disrupt an antisocial developmental trajectory for children who steal. Limitations of the study and directions for future research are discussed.

No description available.

No description available.

In the last 20 years mobile devices gained an important role in daily life and became must have items for everyone. As mobile devices give us the much needed flexibility and mobility, they also represent one major concern; security. As the information is transmitted from node to node via radio frequencies, an imposter can gain access into a mobile network without the need to gain physical access to firewalls and gateways. Also, as they are light and small, mobile devices are easily lost and often used without any PIN or password protection enabled. Hence, it is not difficult for someone even without any technical knowledge to gain access to such devices if they have been left behind or stolen. As traditional intrusion detection systems are not very effective against this kind of attack, there is a need of a different approach that can assist in the identification of a potential imposter. This thesis begins by assessing the security needs of the mobile devices, and establishes the perceived inadequacy of existing safeguards in this respect. Therefore this research considers using Behaviour-Based Mobile Intrusion Detection System (BeMIDS) that aims to assist the identification of anomalous user activity. This in return presents the two main characteristics needed to classify a legitimate user inside a mobile network: first with whom, when and what type of connection is established and then at where the mobile device is left open. After this the research proposes a novel approach that investigates the application of three machine learning algorithms to profile user behaviour in mobile networks. In BeMIDS, historical user profiles are created and then compared with the real-time ones in order to detect unusual activity in mobile networks. If a user’s behaviour changes, this results in alerting the system as an anomalous activity. Specific examples of behaviours that BeMIDS appears to be particularly sensitive to include duration (of calls and of connection with cell towers), time of day (calls are made and cell towers are connected), and frequency of caller usage. In order to classify a legitimate user over a mobile network the thesis then validates this approach by implementing C4.5, RIPPER and SOM algorithms over MIT’s Reality Mining Dataset. The results support the proposed architecture and present accuracy rate as high as 96% for call logs and 94% for tower logs under training conditions.

Optimistic explanatory style refers to the way in which individual’s routinely attribute cause to the events in their lives (Ambramson et al., 1978) and can be successfully enhanced through the use of cognitive behavioural therapy (CBT) group-based workshops (Buchanan et al., 1999; Seligman et al., 2007). It has been successfully measured via the self-report Attributional Style Questionnaire (ASQ: Peterson et al., 1982) and has been associated with better performance and lower levels of state anxiety following negative feedback (Martin-Krumm et al., 2003), a lower incidence of stress-related physical illness (Jackson et al., 2002; Buchanan et al., 1999), and lower levels of job-related emotional distress (Hershberger et al., 2000). In 2005, teaching was identified as the second most stressful job undertaken within the UK (Johnson et al., 2005) and two independent reviews of the teacher-stress literature both concluded that further research is required to develop effective stress-management interventions (Kyriacou, 2000; Jarvis, 2002). Furthermore, Jarvis (2002) specifically highlights CBT-based interventions as an avenue which requires research within the teacher-stress domain. In 2005, Bryant (unpublished MSc thesis) highlighted a link between optimistic explanatory style and lower levels of stress in student Physical Education (PE) teachers who were undergoing the practicum element of their one-year postgraduate diploma of education. The current thesis explored the effectiveness of a CBT-based optimism training programme in developing optimism and reducing stress in student and neophyte PE teachers. A longitudinal, repeated-measures, mixed methods design was employed in a naturalistic setting. Using a pre-test, intervention, post-test design, the effects of CBT-based training were shown to enhance optimism and positive affectivity, and reduce cognitive stress in student teachers during the practicum element of their professional training. To strengthen causal links, a dose-response design was used to provide enhanced training to a sub-group of student teachers. Although differences in optimism and perceived cognitive stress were present in the results, they were not significant. Finally, a qualitative interview based follow-up study identified that participants who had received the prolonged CBT-based optimism training exhibited higher levels of optimistic explanatory style, lower levels of stress and more dispositional optimism than participants who received either the initial or no optimism training. Theoretical and practical implications of the current findings and directions for future research are discussed.