Psychotic-like experiences in a community sample of adolescents: implications for the continuum model of psychosis and prediction of schizophrenia

Studies conducted in community samples suggest that psychotic-like experiences are common in the general population, leading to suggestions that they are either variations of normal personality or are different expressions of underlying vulnerability to psychotic disorder. Different types of psychotic symptoms may exist, some being normal variants and some having implications for mental health and functioning. The aim of the present study was to determine if different subtypes of psychotic-like experiences could be identified in a community sample of adolescents and to investigate if particular subtypes were more likely to be associated with psychosocial difficulties, that is, distress, depression and poor functioning, than other subtypes. Eight hundred and seventy-five Year 10 students from 34 schools participated in a cross-sectional survey that measured psychotic-like experiences using the Community Assessment of Psychic Experiences; depression using the Centre for Epidemiologic Studies Depression Scale; and psychosocial functioning using the Revised Multidimensional Assessment of Functioning Scale. Factor analysis was conducted to identify any subtypes of psychotic experiences. Four subtypes of psychotic-like experiences were identified: Bizarre Experiences, Perceptual Abnormalities, Persecutory Ideas, and Magical Thinking. Intermittent, infrequent psychotic experiences were common, but frequent experiences were not. Bizarre Experiences, Perceptual Abnormalities and Persecutory Ideas were strongly associated with distress, depression and poor functioning. Magical Thinking was only weakly associated with these variables. Overall these findings may suggest that infrequent psychotic-like experiences are unlikely to be a specific risk factor for onset of a psychotic disorder in community samples. Given that the different subtypes had varying associations with current difficulties it is suggested that not all subtypes confer the same risk for onset of psychotic disorder and poor outcome. Bizarre Experiences, Perceptual Abnormalities and Persecutory Ideas may represent expressions of underlying vulnerability to psychotic disorder, but Magical Thinking may be a normal personality variant.

Learning from the MOOCs model

Array

The Hotelling–Downs model with runoff voting

We consider the Hotelling–Downs model with n⩾3n⩾3 office-seeking candidates and runoff voting. We show that Nash equilibria in pure strategies always exist and that there are typically multiple equilibria, both convergent (all candidates are located at the median) and divergent (candidates locate at distinct positions), though only divergent equilibria are robust to free entry. Moreover, two-policy equilibria exist under any distribution of votersʼ ideal policies, while equilibria with more than two policies exist generically but under restrictive conditions that we characterize.

The method is design: towards a handbook of design research tactics

New Zealand's schools of architecture are unique in the Australasian context, in that the fifth year of study for students takes the form of a 12-month research thesis. This structure prompts reflection on research through the medium of design, which we will explore here in the context of the Victoria University of Wellington (VUW).

But with recent developments in digital technology, new materials and construction practices, shifts in the client-architect relationship, and architectural practice subject to evermore-onerous procurement models, is the studio model still ...

The Doha model of organ donation and transplantation: thinking beyond citizenship

This paper reviews the policy and practice of organ donation and transplantation in Qatar that has developed since January 2011. The important features of the Doha Model (the ‘Model’) are explored, including: (i) all legal residents of Qatar have an equal right to access deceased donor organs and transplantation regardless of their citizenship status; (ii) no prioritisation in organ allocation is given to Qatari citizens; (iii) a multilingual and multicultural education and promotional program about donation has been implemented to engage the diverse national communities resident within Qatar; (iv) financial incentives or fungible rewards for living or deceased donation are prohibited. The ethical framework of this policy will be examined in the light of the national self-sufficiency paradigm, which advocates reciprocity and solidarity among resident populations seeking to meet all needs for transplantation equitably. We review some preliminary evidence of the impact of the Model with respect to engagement of a highly diverse multinational population in a donation and transplantation program, and argue that the Model may inform policy and practice in other countries, particularly those with non-citizen resident populations.

Rethinking the Australian model of promoting gender equality

Examines the public law of gender and equality from the perspectives of comparative constitutional law, international law and governance.

Implementing the Flinders Model of self-management support with Aboriginal people who have diabetes : findings from a pilot study

A pilot program for Aboriginal people with diabetes on Eyre Peninsula, South Australia, aimed to test the acceptability and impact of using the Flinders model of self-management care planing to improve patient self-management. A community development approach was used to conduct a twelve-month demonstration project. Aboriginal health workers (AHWs) conducted patient-centred, self-management assessment and care planning. Impacts were measured by patient-completed diabetes self-management assessment tool, goal achievement, quality of life and clinical measures at baseline and 12 months. Impact and acceptability were also assessed by semi-structured interviews and focus groups of AHWs. Sixty Aboriginal people with type 2 diabetes stated their main problems as family and social dysfunction, access to services, nutrition and exercise. Problems improved by 12% and goals by 26%, while quality of life scores showed no significant change. Self-management scores improved in five of six domains. Mean HbA1c reduced from 8.74-8.09 and mean blood pressure was unchanged. AHWs found the process acceptable and appropriate for them and their patients. It was concluded that a diabetes self-management program provided by AHWs is acceptable, improves self-management and is seen to be useful by Aboriginal communities. Barriers include lack of preventative health services, social problems and time pressure on staff. Enablers include community concern regarding the prevalence and mortality associated with diabetes.

Stability analysis of two-dimensional Markovian jump state-delayed systems in the Roesser model with uncertain transition probabilities

This paper is concerned with the problem of stochastic stability analysis of discrete-time two-dimensional (2-D) Markovian jump systems (MJSs) described by the Roesser model with interval time-varying delays. The transition probabilities of the jumping process/Markov chain are assumed to be uncertain, that is, they are not exactly known but can be estimated. A Lyapunov-like scheme is first extended to 2-D MJSs with delays. Based on some novel 2-D summation inequalities proposed in this paper, delay-dependent stochastic stability conditions are derived in terms of linear matrix inequalities (LMIs) which can be computationally solved by various convex optimization algorithms. Finally, two numerical examples are given to illustrate the effectiveness of the obtained results.

International students in the private VET sector in Melbourne, Australia: rethinking their characteristics and aspirations outside the deficit model

The reconstruction of the Australian Vocational Education and Training (VET) sector into a competitive training market, which led to the participation of international students and commercial for-profit private VET providers, has until
recently focused on the importance of international students to the national economy whilst ignoring the students ’important educational characteristics and the other benefits that accrue to Australia. Drawing on views and perspectives of students, teachers, training managers and quality assurance auditors, this article presents an analysis of the VET provider-level processes, which have contributed tolimited discursive constructions of the identities of international students in private VET providers in Melbourne. It argues that there is an urgent need for a rethinking of the way international students are conceptualised and represented in the competitive training market environment.