Correction for bias in maximum likelihood estimators of in a right–censored normal distribution

It is assumed that the logs of the time to failure in a life test follow a normal distribution. If the test is terminated after r of a sample of n items fail, the test is said to be censored. If the sample size is small and censoring severe, the usual maximum likelihood estimator of a is downwardly biased. Monte Carlo techniques and regression analysis were used to develop an empirical correction factor. Applying the correction factor to the maximum likelihood estimator yields an unbiased estimate of σ.     

Effects of the Home Learning Environment and Preschool Center Experience upon Literacy and Numeracy Development in Early Primary School

This study investigates the influence of aspects of home and preschool environments upon literacy and numeracy achievement at school entry and at the end of the 3rd year of school. Individuals with unexpected performance pathways (by forming demographically adjusted groups: overachieving, average, and underachieving) were identified in order to explore the effects of the home learning environment and preschool variables on child development. Multilevel models applied to hierarchical data allow the groups that differ with regard to expected performance to be created at the child and preschool center levels. These multilevel analyses indicate powerful effects for the home learning environment and important effects of specific preschool centers at school entry. Although reduced, such effects remain several years later .     

Not Just Social Work Academics: The Involvement of Others in the Assessment of Social Work Students

University regulations typically assume that the assessment of students is essentially a task for paid academic staff. However, this is a far cry from much of the current literature about assessment in social work education, of which one of the distinguishing features is the not infrequent references to stakeholders beyond the individuals who are to be assessed and the academic staff employed to teach them. This paper reviews some of the recent literature on the involvement of persons other than social work academics, including students, practice teachers and service users, in assessing students studying in social work programmes. Implications for programme providers of using non‐academic assessors are explored.     

Video conferencing applications in social work: Work locally,think globally

Abstract

Video conferencing is a technology that facilitates the provision of high quality education, health-care and consultation to clients and families served by rural area health professionals via visual and audio transmissions. It also plays an important role in the education, and training of rural health professionals and the development of a multidisciplinary team dialogue between rural and metropolitan partners. This paper describes our experience of a video conferencing program conducted at the Goulburn Valley Mental Health Service and St George's Older Persons Mental Health Service. We have found a number of benefits of this technology for clients, their families and for health professionals themselves. The development of expertise in the use of video conferencing technology has empowered social workers in their work places. Video conferencing has been extended to other aspects of social work practice. A pertinent example of this is the use of video conferencing in Guardianship and Administration hearings for patients who would otherwise be unable to attend because of health problems (physical, mental and mobility).     

The sexuality‐assemblage: desire,affect, anti‐humanism

Two theoretical moves are required to resist the ‘humanist enticements’ associated with sexuality. Post‐structuralism supplies the first, showing how the social produces culturally specific sexual knowledgeabilities. A second anti‐humanist move is then needed to overturn anthropocentric privileging of the human body and subject as the locus of sexuality. In this paper we establish a language and landscape for a Deleuze‐inspired anti‐humanist sociology of sexuality that shifts the location of sexuality away from bodies and individuals. Sexuality in this view is an impersonal affective flow within assemblages of bodies, things, ideas and social institutions, which produces sexual (and other) capacities in bodies. Assemblages territorialize bodies' desire, setting limits on what it can do: this process determines the shape of sexuality, which is consequently both infinitely variable and typically highly restricted. We illustrate how this anti‐humanist ontology may be applied to empirical data to explore sexuality‐assemblages, and conclude by exploring the theoretical and methodological advantages and disadvantages of an anti‐humanist assemblage approach to sexuality.     

Umhlaba 1913–2013

This essay argues that the violent explosion at Marikana is an indication that ordinary South Africans are rapidly losing faith in the democratic institutions and social contract arrangements that underpin the 1994 post-apartheid South African democratic social contract, whether Parliament, the collective bargaining system, or the National Economic Development and Labour Council (Nedlac). Similarly, “legitimate” institutions, such as political parties, trade unions and civic organisations – the organisations which pre-date 1994 – are also increasingly experienced by their members and supporters as not responsive, relevant or accountable. Marikana shows that if democratic institutions and “legitimate” institutions do not become more responsive, accountable and democratic quickly, ordinary people will increasingly look to new ones, including populists ones, or seek answers in violence. The essay concludes that although there are still many democratic and “legitimate” institutions which generate high levels of trust and enjoy widespread credibility and legitimacy, South Africa may have to renew aspects of its democratic social contract, institutions and rules, and in some cases, even create new, more relevant ones.