Performance of an objective fabric pilling evaluation method

In previous work, we established the principle of objective fabric pilling evaluation based on two-dimensional dual-tree complex wavelet transform (2DDTCWT) image reconstruction and non-linear classification using a neural network. This proof-of-principle work was performed using standard pilling test images. Here, we demonstrate the practical operation of the objective pilling evaluation method using a large set of real fabric pilling samples. We show that piling classification results from a trained multiple-layer perceptron neural network achieve a regression correlation of approximately 96% with the corresponding human expert pilling ratings.

The development and validation of a psychological contract of safety scale

Introduction
This paper builds on previous research by the author and describes the development and validation of a new measure of the psychological contract of safety. The psychological contract of safety is defined as the beliefs of individuals about reciprocal safety obligations inferred from implicit and explicit promises.

Method
A psychological contract is established when an individual believes that perceived employer and employee safety obligations are contingent on each other. A pilot test of the measure is first undertaken with participants from three different occupations: nurses, construction workers, and meat processing workers (N = 99). Item analysis is used to refine the measure and provide initial validation of the scale. A larger validation study is then conducted with a participant sample of health care workers (N = 424) to further refine the measure and to determine the psychometric properties of the scale.

Results
Item and correlational analyses produced the final employer and employee obligations scales, consisting of 21 and 17 items, respectively. Factor analyses identified two underlying dimensions in each scale comparable to that previously established in the organizational literature. These transactional and relational-type obligations provided construct validity of the scale. Internal consistency ratings using Cronbach's alpha found the components of the psychological contract of safety measure to be reliable.

Impact on Industry
The refined and validated psychological contract of safety measure will allow investigation of the positive and negative outcomes associated with fulfilment and breach of the psychological contract of safety in future research.

Culturally-linked leadership styles

Purpose – This paper seeks to examine whether cultural context facilitates the emergence of different leadership styles. The key objective of the paper is to consider whether leadership styles are
culturally-linked and/or culturally-biased.
Design/methodology/approach – A multifactor leadership questionnaire was utilised to measure differences in leadership styles and to offer explanations as to why the “one size fits all” view is not appropriate. Analysis of variance and t-tests were utilised to compare means for more than two managerial groups.
Findings – The analysis found significant differences between leadership styles and cultural groups, hence, supporting the argument that culture and leadership interact in different ways in diverse
contexts. Transactional leadership was found to be strongly aligned with the ratings of managers from Malaysia, and transformational leadership scales correlated with the Australian respondents’ mean
ratings.
Practical implications – Variations in leadership styles are due to cultural influences because people have different beliefs and assumptions about characteristics that are deemed effective for leadership. Therefore, it is fundamental to know what leadership skills and knowledge are valued most by managers on a global level. This information is critical as it offers insight into developing competencies in different workplaces, especially as organisations expand their geographical boundaries into international markets.
Originality/value – The findings of the study provide empirical understanding for culturally-linked leadership styles. The paper contributes to understanding the importance of workforce diversity and attention to other cultures and, thus, enhances our appreciation of today’s “global village”.

Examination of the consistency of interviewer performance across three distinct interview contexts

The current study examined the consistency of investigative interviewers' performance (n=31) across three distinct interview paradigms: (a) a mock interview where an adult actor played the role of a child recalling abuse, (b) a mock interview where a school child recalled an innocuous event that was staged at the child's school, and (c) a field interview where the interviewer elicited a statement of abuse from a child. Performance was measured by calculating the proportion of open-ended and leading questions, and by eliciting expert ratings of the presence of a range of problem behaviours commonly exhibited by interviewers. Overall, the performance of individual interviewers was relatively stable across the tasks. Heterogeneity in stability, however, differed according to the type of question and the nature of the event being examined. In particular, the mock interview paradigm where the adult acted the role of an alleged child abuse victim produced a measure of performance that was more similar to the field interview than the interview where a school child recalled an innocuous event. The implications of the findings for trainers, and directions for future research, are discussed.

Students' perceptions of the value of the elements of an online learning environment : an investigation of discipline differences

This paper presents a large scale, quantitative investigation of the impact of discipline differences on the student experience of using an online learning environment (OLE). Based on a representative sample of 2526 respondents, a number of significant differences in the mean rating by broad discipline area of the importance of, and satisfaction with, a range of elements of an OLE were found. Broadly speaking, the Arts and Science and Technology discipline areas reported the lowest importance and satisfaction ratings for the OLE, while the Health and Behavioural Sciences area was the most satisfied with the OLE. A number of specific, systematic discipline differences are reported and discussed. Compared to the observed significant differences in mean importance ratings, there were fewer significant differences in mean satisfaction ratings, and those that were observed were less systematic than for importance ratings.

The influence of sodium on liking and consumption of salty food

Excessive sodium (Na) intake has been linked to development of hypertension and related pathologies. In this study, we assessed if the sodium chloride (NaCl) concentration in a prototypical food influences the liking and intake of that food. In study 1, detection and recognition thresholds for NaCl were assessed, and perceived salt intensity and liking for hash browns of varying sodium concentrations (40 mg, 120 mg, 170 mg, and 220 mg Na/100 g) were compared in a lab setting. In study 2, detection and recognition thresholds for NaCl were assessed in a lab setting, and lunches consisting of hash browns, basic salad, and beverages were consumed freely in a dining setting on 4 separate occasions. Intake and liking ratings for hash browns were recorded after the lunch. In both studies, detection and recognition thresholds for NaCl were not associated with perceived saltiness, liking, or intake of hash browns. Liking and perceived salt taste intensity of hash browns were correlated (r = 0.547 P < 0.01), and in study 1 the 220 mg sodium hash brown was most liked (P < 0.05). In study 2, there was no association between Na concentration and liking or consumption of hash browns. In summary, liking of hash browns were influenced by whether testing was in a lab or dining room environment. In a dining room environment, large decreases (>50%) of sodium content of food were achievable with only minor decrease in liking and no effect on consumption of the food.

AssetDivider : a new mediation tool in Australian family law

This article describes research in a new theory of decision support in negotiation in family law mediation. AssetDivider was based on the principles of Family_Winner. As a Negotiation Decision Support System Family_Winner takes ratings assigned to items by the parties involved and develops a list of allocations to each party; based on trade-offs inherently present in the dispute. Given advice provided from our industry partners Relationships Australia (Queensland) - RAQ, AssetDivider uses an ideal “percentage split” to guide the development of an allocation list for parties. The system has been tested informally by our contacts at RAQ, and we now look forward to extensive testing and evaluation by mediators at RAQ in the near future. We hope to report on a comprehensive evaluation which will report on the effectiveness of this program in practice.

Trade-off manipulations in the development of negotiation decision support systems

Our model of negotiation for constructing Negotiation Decision Support Systems is based upon Principled Negotiation and uses trade-off manipulations in order to provide decision support. A resulting system, Family_Winner, was constructed using several information systems techniques. Trade-off Maps (a variant of Constraint Diagrams) are used to represent trade-off opportunities, while an empirically derived formula calculates the amount of compensation given to the ratings of issues remaining in dispute. The Issue Decomposition Hierarchy embedded in the system allows for the incorporation of sub-issues. Family_Winner was originally built for use in Australian Family Law. We believe our model can be extended for use in various other domains.

Family_Winner has been evaluated in the areas of industrial relations, international disputation and company disputes. Results from our evaluation suggest the system works satisfactorily in these domains. We conclude this paper by describing future projects that will develop and extend Family_Winner's functions and applicability.

The effects of playing violent video games on adolescents : should parents be quaking in their boots?

Debate regarding the psychological and behavioural effects of playing violent video games has recently led to claims that violent video games increase aggression effects in adolescents, and that this issue has now been settled. However, other researchers have found either no detrimental effects from game playing or even positive (cathartic) effects. In this research we demonstrate that these different conclusions are not mutually exclusive and can be explained by the method of assessment and analytic techniques utilised. We had adolescents play a violent video game (Quake II) and took measurements of anger both before, during and after game play. The results demonstrated that some people increase, some decrease and the majority show no change in anger ratings. Unlike past research, we also demonstrate that these changes are mediated by the player's feelings immediately prior to game play and a labile temperament - one predisposed to aggression - and that these variables predict people's reactions with an average 73% concordance rate.

Evaluation of the use of Assessment Centre methodology to enhance development planning, work placement outcomes and work readiness for postgraduate students : a pilot

Background: Placements as a form of Work Integrated Learning are widely recognised for the positive impact they have on improving student employability and work readiness. Students can maximise strengths, improve areas of weakness, and develop a strong understanding of the requirements of their chosen field within the confines of a well monitored and rich learning environment. Assessment Centres (ACs) are commonly used in corporate settings for recruitment, selection and more recently to provide developmental feedback to participants. Based on a recent literature review, the present the present project evaluates the application of AC methodology as a developmental tool within the placement milieu. The review, which is also included the current conference proceedings details the benefits of utilising the AC process forming the impetus for the present pilot (Sturre; von Treuer & Keele 2010).
Aims: The primary aim of the paper was to evaluate the application of AC methodology as a tool for measuring and subsequently enhancing professional competencies in a sample of postgraduate students in organisational psychology (n=15).
Method: A longitudinal design was utilised with numerous evaluation points from placement stakeholders. This paper presents the first wave of findings. Students undertook a range of activities, including an in-tray exercise, role play, written report, leaderless group discussion and a personality assessment. Comprehensive feedback was provided by organisational psychologists who also fulfil the role of placement co-ordinators. With the assistance of Placement Co-ordinators, students prepared development plans relating to the competencies identified as requiring development. These plans were to be addressed and progress monitored during consecutive placements.
Results: Initial perceptions gathered from students regarding the AC process were very encouraging. Performance
evaluations collected to date, as measured by behaviourally based ratings scales completed by the students themselves and their workplace supervisors illustrate the positive effect of this methodology. The rigour and comprehensive techniques offered by the methodology enabled students to focus on and improve areas identified for development.
Conclusions: It is important to note that the present design formed a pilot study and as mentioned was undertaken with a limited sample. Future implementation is planned with larger samples, enabling a more comprehensive analysis of the methodology. Nevertheless, the methodology appears to provide a much needed strategy for the assessment and ongoing development of students prior to and during work placements. The application provides early intervention enabling students to address development needs with input from both university and organisational stakeholders based on an established, standardised process.

N-acetyl cysteine for depressive symptoms in bipolar disorder - a double blind, randomized, placebo-controlled trial

Background: Treatment-resistant subthreshold depression is a major problem in bipolar disorder. Both depression and bipolar disorderare complicated by glutathione depletion. We hypothesized that treatment with N-acetyl cysteine (NAC), a safe, orally bioavailable precursor of glutathione, may improve the depressive component of bipolar disorder.

Methods: A randomized, double-blind, multicenter, placebo-controlled study of individuals (n 75) with bipolar disorder in the maintenance phase treated with NAC (1 g twice daily) adjunctive to usual medication over 24 weeks, with a 4-week washout. The two primary outcomes were the Montgomery Asberg Depression Rating Scale (MADRS) and time to a mood episode. Secondary outcomes included the Bipolar Depression Rating Scale and 11 other ratings of clinical status, quality of life, and functioning.

Results: NAC treatment caused a significant improvement on the MADRS (least squares mean difference [95% confidence interval]: 8.05 [13.16, 2.95], p .002) a n d most secondary scales at end point. Benefit was evident by 8 weeks on the Global Assessment of Functioning Scale and Social and Occupational Functioning Assessment Scale and at 20 weeks on the MADRS. Improvements were lost after washout. There was no effect of NAC on time to a mood episode (log-rank test: p .968) and no significant between-group differences inadverse events. Effect sizes at end point were medium to high for improvements in MADRS and 9 of the 12 secondary readouts.

Conclusions: NAC appears a safe and effective augmentation strategy for depressive symptoms in bipolar  disorder.

The validity of the CGI severity and improvement scales as measures of clinical effectiveness suitable for routine clinical use

Objective The Clinical Global Impression Scale (CGI) is established as a core metric in psychiatric research. This study aims to test the validity of CGI as a clinical outcome measure suitable for routine use in a private inpatient setting.

Methods The CGI was added to a standard battery of routine outcome measures in a private psychiatric hospital. Data were collected on consecutive admissions over a period of 24 months, which included clinical diagnosis, demographics, service utilization and four routine measures (CGI, HoNOS, MHQ-14 and DASS-21) at both admission and discharge. Descriptive and comparative data analyses were performed.

Results Of 786 admissions in total, there were 624 and 614 CGI-S ratings completed at the point of admission and discharge, respectively, and 610 completed CGI-I ratings. The admission and discharge CGI-S scores were correlated (r = 0.40), and the indirect improvement measures obtained from their differences were highly correlated with the direct CGI-I scores (r = 0.71). The CGI results reflected similar trends seen in the other three outcome measures.

Conclusions The CGI is a valid clinical outcome measure suitable for routine use in an inpatient setting. It offers a number of advantages, including its established utility in psychiatric research, sensitivity to change, quick and simple administration, utility across diagnostic groupings, and reliability in the hands of skilled clinicians.

Client-reported reasons for non-engagement in drug and alcohol treatment

Introduction and Aims.To examine client-reported reasons for missed early appointments at a drug and alcohol treatment service and to compare characteristics of those who missed appointments with those who attended. Design and Methods. Clients who missed a first or second appointment between 1 May and 31 August 2007 at a public community-based outpatient treatment facility were invited to participate in a semistructured telephone interview.This consisted of an open-ended question asking the reason(s) for nonattendance, followed by a questionnaire of items for therapeutic alliance and service satisfaction, perceived impact of substance use and previous treatment experience, mostly rated on Likert scales. Database information on demographic and clinical variables was gathered for all clients who were accepted for treatment within the study time frame. Characteristics of those who missed a first or second appointment (n = 66) were compared with those who attended at least their first two appointments (n = 97). Results. Of clients who missed their appointments, 80.6% provided reasons for nonattendance, which included extraneous factors (50.0%), service shortcomings (29.7%), no further need for service (16.2%) and motivational ambivalence (4.1%). They generally had high ratings of therapeutic alliance and service satisfaction and identified their substance use as having a negative impact on their lives. Clients who missed appointments were more likely to be male, unmarried and have a history of polysubstance use. Discussion and Conclusions. Extraneous issues relating to the client may be a dominant obstacle in early treatment engagement. Efforts to overcome these issues may therefore improve early engagement.

An evaluation of a project-based learning initiative in engineering education

Project-based learning (PBL) is a well-known methodology for engineering design education due to a number of benefits it is claimed to offer. This paper presents the initial offering of a first-year engineering PBL unit at Griffith University in Australia. An evaluation of student perceptions of the unit revealed that students generally enjoyed the experience, with the oral presentation aspect receiving the lowest satisfaction rating. There was no significant difference in the ratings between any demographic grouping, suggesting that all students were able to participate in, and experience, the unit in essentially the same way. The best aspects of the unit and those aspects needing improvement were similar to the findings of other investigations documented in the literature. It is proposed that future offerings of the unit will reduce the number of design projects from three to two per semester and will attempt more sophisticated individualisation of marks for group work activities.

The architecture of peer assessment : do academically successful design students make good team mates in design assignments?

This paper considers the relationship between architecture and construction management students’ overall academic abilities (as measured by Weighted Average Marks [WAMs]), their peer ratings for contributions to team design assignments (as measured by an online Self-and-Peer-Assessment [SAPA] tool), and their specific abilities as building designers (as measured by grades in individual design assignments). The research was conducted to determine whether a student’s prior academic achievements might indicate how well they will work in teams. The research demonstrates a statistically significant relationship between WAMs and SAPA ratings indicating that academically successful students more often than not make good teammates. However, the study also highlights that when peers are assessing contributions to teamwork they are assessing skills and qualities in their teammates other than overall academic ability or the ability to design well. Whilst this study is largely located within the field of design, the findings are relevant to any group work where teachers aim to design assessment that unravels group and individual contribution.