Amount of mental practice and performance of a simple motor task

The effects of different amounts of mental practice on the performance of a motor skill were studied. Research supports the effectiveness of mental practice on performance; however, little is known about how much practice is needed and whether there is an optimal amount for these practice effects. Participants, 209 students ages 18 to 44 years (M = 20.5, SD = 2.9), completed a pre- and posttest of dart throwing with the nonpreferred hand. In the practice phase, participants completed either 25 (Mental Practice 25), 50 (Mental Practice 50), or 100 (Mental Practice 100) trials of the darts task or 50 trials of a catching task (Catching Task). Performance for all groups improved from pre- to posttest. Improvements for the three mental practice groups were greater than for the Catching Task group; however, there were no differences for the three Mental Practice groups. The findings support the positive effect of mental practice over a control condition and suggest that small amounts of mental practice may be sufficient for performance improvements, at least for a simple motor skill.

Conceptualising a voluntary certification system for highly accomplished teachers

In this paper I argue that a voluntary certification system for highly accomplished teachers must be part of a coherent system of professional accountability which is developed, implemented and managed by the profession. This would be a system that engages professional judgement of evidence provided by teachers in relation to their professional knowledge and practice, and professional standards for teaching would provide the organising framework for that judgment. It would be a system incorporating and aligning all forms of professional licensure, including entry into the profession and subsequent professional milestones. It would be a system that all partners in the profession across Australia—employers, professional associations, and registration authorities—endorse, participate in and align with.

The profession can take the lead in developing and implementing such a coherent and coordinated national approach by carefully developing a system to recognise and reward highly accomplished teaching. Such a system should aim to recognise and build teacher quality by defining what it is highly accomplished teachers know and are able to do. Moreover, such a system must fi nd ways of making teaching public and acknowledging teaching as intellectual work which involves professional judgment that draws on a recognised professional knowledge base and contextualised knowledge about students and their learning.

The paper is presented in two main sections. First, a proposed conceptual framework for the professional recognition and certification of highly accomplished teachers is outlined. Then, the argument for this proposed conceptual framework is presented drawing on learnings from relevant research and professional activity in both Australia and the USA.

Reinvigorating the public sphere : the role of voluntary associations

This thesis examines the key question: can voluntary associations enhance democracy? It tests critical claims made by Habermas and others that voluntary associations have the potential to reinvigorate a public sphere in a state of atrophy. The thesis outlines the major theoretical arguments pertaining to these areas and then presents the results of empirical work within voluntary organisations. Specifically the thesis: Critically examines the concept of the public sphere, being a sphere between the state and civil society and investigates why theorists have advocated voluntary associations, claimed to be the core institutions of civil society, as sites where democratic ideals can be secured; Goes on to examine the concept of civil society and reviews the recent literature that has attempted to define and analyse the role of voluntary associations in contemporary society; Tests empirically the normative ideals that have been advocated on behalf of voluntary associations through the presentation of data obtained using qualitative methodology. The analysis of the data collected during interviews with key employees and members of six voluntary associations in Melbourne, Australia allows for a more informed knowledge regarding the key concepts and themes of the thesis. The thesis ends by directly addressing the following points: whether or not the public sphere is in a state of atrophy; the particular nature of voluntary associations contemporary engagement in the public sphere; and whether voluntary associations can indeed, be sites where democracy can be enhanced and democratic ideals be secured. It is concluded that voluntary associations operate within Habermasian public spheres, counterspheres, and postmodern public spheres and that unitary notions of the public sphere, such as those Habermas proposes, do not adequately explain voluntary associations engagement in the public sphere. Accordingly, it is concluded that voluntary associations have the potential to invigorate public spheres, though not in ways that many theorists writing on the subject suggest.

Knowledge sharing in professional accountancy firms : the effects of task complexity and management control system

Numerous empirical studies on knowledge management have focused on effectiveness of enablers such as organizational structure (Bennett and Gabriel, 1999; Gold et al., 2001), technology (Gold et al., 2001; O’Dell and Grayson, 1998), culture (DeLong and Fahey, 2000; Gupta and Govindarajan, 2000), managerial system (Nonaka, 1994; Sveiby, 1997) and strategy (Bierly and Chakrabarti, 1996; Holsapple and Joshi, 2001) on knowledge sharing. These enablers are organizational infrastructure or mechanism for facilitating the sharing of knowledge in a firm. In knowledge-intensive firms, task complexity and management control systems (MCS) can potentially affect the mode and effectiveness of knowledge sharing. However, these two factors have not been distinctly and explicitly investigated and discussed in literature relevant to the domain of knowledge sharing and management. This study proposes to examine how task complexity and the design of MCS could be the key determinants of the mode and effectiveness of knowledge sharing in professional accounting firms or practices.

Motivation and coercion among mandated and voluntary drug treatment clients

Voluntary and mandated drug treatment clients were interviewed to investigate the role that motivation and perceived coercion had on their outcomes. The major findings were first, there were few differences between these two groups, and second, motivation was an important predictor of treatment outcome.

Monitoring voluntary food intake in female endurance athletes

Female athletes may demonstrate a poor ability to quantify portion sizes and educational sessions using food models do not always improve accuracy. Female cyclists with the highest body fat do not report the highest energy intakes during 70 days of training and racing. Training loads can influence reported daily energy intake.

Task completion with partially-failed manipulators

An effort to maintain the availability of partially failed manipulator is addressed based on redundant trajectories obtained by primitive constraints. The objective is to facilitate the existing manipulators to continue their point to point motion tasks when a non catastrophic fault occurs into a joint. The fault is assumed as a joint locked failure. This is achieved through fault to primitive constraints mapping which gives the primitive constraints due to the faults. Then they are applied to update the manipulator constraints for the trajectory planning. Then it purposes a new trajectory in the case of availability. Finally the method is applied for a 6DOF manipulator and validated under a fault scenario within a simulation study and the results are presented.