Driver behaviour prediction for motion simulators using changepoint segmentation

Driving phenomenon is a repetitive process, that permits sequential learning under identifying the proper change periods. Sequential filtering is widely used for tracking and prediction of state dynamics. However, it suffers at abrupt changes, which cause sudden incremental prediction error. We provide a sequential filtering approach using online Bayesian detection of change points to decrease prediction error generally, and specifically at abrupt changes. The approach learns from optimally detected segments for identifying driving behaviour. Change points detection is done by the Pruned Exact Linear Time algorithm. Computational cost of our approach is bounded by the cost of the implemented sequential filter. This computational performance is suitable to the online nature of motion simulator's delay reduction. The approach was tested on a simulated driving scenario using Vortex by CM Labs. The state dimensions are simulated 2D space coordinates, and velocity. Particle filter was used for online sequential filtering. Prediction results show that change-point detection improves the quality of state estimation compared to traditional sequential filters, and is more suitable for predicting behavioural activities.

The association between types of eating behaviour and dispositional mindfulness in adults with diabetes. Results from Diabetes MILES. The Netherlands.

Although healthy food choices are important in the management of diabetes, making dietary adaptations is often challenging. Previous research has shown that people with type 2 diabetes are less likely to benefit from dietary advice if they tend to eat in response to emotions or external cues. Since high levels of dispositional mindfulness have been associated with greater awareness of healthy dietary practices in students and in the general population, it is relevant to study the association between dispositional mindfulness and eating behaviour in people with type 1 or 2 diabetes. We analysed data from Diabetes MILES - The Netherlands, a national observational survey in which 634 adults with type 1 or 2 diabetes completed the Dutch Eating Behaviour Questionnaire (to assess restrained, external and emotional eating behaviour) and the Five Facet Mindfulness Questionnaire-Short Form (to assess dispositional mindfulness), in addition to other psychosocial measures. After controlling for potential confounders, including demographics, clinical variables and emotional distress, hierarchical linear regression analyses showed that higher levels of dispositional mindfulness were associated with eating behaviours that were more restrained (β = 0.10) and less external (β = -0.11) and emotional (β = -0.20). The mindfulness subscale 'acting with awareness' was the strongest predictor of both external and emotional eating behaviour, whereas for emotional eating, 'describing' and 'being non-judgemental' were also predictive. These findings suggest that there is an association between dispositional mindfulness and eating behaviour in adults with type 1 or 2 diabetes. Since mindfulness interventions increase levels of dispositional mindfulness, future studies could examine if these interventions are also effective in helping people with diabetes to reduce emotional or external eating behaviour, and to improve the quality of their diet.

Dissecting obesogenic behaviours: the development and application of a test battery for targeting prescription for weight loss

There are limited practical tools to help clinicians or public health workers manage obesity in their patients. We have previously developed a scanning technique for diagnosing environments leading to obesity (Analysis Grid for Environments/Elements Leading to Obesity). Here we describe the development of a tool for identifying behaviours in an individual most likely to lead to obesity. A questionnaire battery of five tests called the DAB-Q (Diet, Activity and Behaviour Questionnaire) was developed, piloted and internally validated with overweight women from a commercial weight loss programme. Outcome from the tests, which are available free on the Internet, provides clinicians with a simple, effective and time-saving tool for ranking foods, drinks and activities likely to be most effectively targeted for weight loss in an individual. This is based on total scores derived from measures of frequency, potential for change and potency of each item as a potential contributor to overweight.

It starts with the parents and ends with the parents

Alcohol is the most popular recreational drug in Australia. Despite the fact that many people gain enjoyment from alcohol related industries, alcohol is also implicated in much personal trauma and social damage. Parents play a key role in influencing alcohol use and driver behaviour in young people. The aim of this study was to gain an understanding of the attitudes and concerns of parents in Melbourne in relation to their teenage children's use of alcohol and how they educate and/or provide role models for their adolescents with respect to alcohol usage. A convenience sample of parents with adolescent children participated in focus groups. Parents described patterns of alcohol use and perceived influences on consumption. They reported that they wanted to create safe environments for adolescents to consume alcohol but that they needed more support and information on which to base these decisions. There i, an opportunity for public health policy makers to specifically address parents and enhance their role in alcohol related road safety.

Do drivers intentionally target wildlife on roads?

Despite frequent reliance on surveys to document public attitudes towards conservation issues (such as invasive-species control), only rarely do researchers assess the validity of statements made by the public in response to such surveys. Therefore, how well responses match actual behaviour remains an open question. We conducted a survey asking drivers if they had seen and/or run over (intentionally or not) snakes, native frogs or invasive cane toads (Rhinella marina) on roads in the Northern Territory of Australia. To compare actual driver behaviour to the survey responses, we also carried out field experiments where we quantified the rates at which model snakes, frogs and toads (and controls) were run over on a rural highway. Our results show a discrepancy between survey responses and driver behaviour: for example, 25% of the people we surveyed indicated that they intentionally run over cane toads, yet field experiments showed that model toads were run over no more frequently than expected by chance, or than any other type of model.

Setback distances as a conservation tool in wildlife-human interactions : testing their efficacy for birds affected by vehicles on open-coast sandy beaches

In some wilderness areas, wildlife encounter vehicles disrupt their behaviour and habitat use. Changing driver behaviour has been proposed where bans on vehicle use are politically unpalatable, but the efficacy of vehicle setbacks and reduced speeds remains largely untested. We characterised bird-vehicle encounters in terms of driver behaviour and the disturbance caused to birds, and tested whether spatial buffers or lower speeds reduced bird escape responses on open beaches. Focal observations showed that: i) most drivers did not create sizeable buffers between their vehicles and birds; ii) bird disturbance was frequent; and iii) predictors of probability of flushing (escape) were setback distance and vehicle type (buses flushed birds at higher rates than cars). Experiments demonstrated that substantial reductions in bird escape responses required buffers to be wide (> 25 m) and vehicle speeds to be slow (< 30 km h-1). Setback distances can reduce impacts on wildlife, provided that they are carefully designed and derived from empirical evidence. No speed or distance combination we tested, however, eliminated bird responses. Thus, while buffers reduce response rates, they are likely to be much less effective than vehicle-free zones (i.e. beach closures), and rely on changes to current driver behaviour

Investigating fitness to drive in older drivers with cognitive impairment

This thesis investigated driving behaviour of senior drivers with cognitive impairment in order to gain an understanding of how cognition impacts on driver behaviour and fitness to drive.

The assessment of motivation for behaviour change among sex offenders against children: an investigation of the utility of the Stages of Change Questionnaire

A better understanding of motivation for behaviour change among sex offenders against children would improve treatment programmes designed to modify sexual offending behaviour. However, investigation of this issue is limited by lack of theoretically and empirically sound measures of motivation for behaviour change among sex offenders. This paper reports on two studies that were conducted to investigate the psychometric properties (validity, reliability, and social desirability) of the Stages of Change Questionnaire, adapted to measure motivation for behaviour change among sex offenders against children. In Study 1, the psychometric properties of the questionnaire were assessed for sex offenders against children (n=36) who were on a treatment waiting list. In Study 2, the psychometric properties of the questionnaire were assessed for sex offenders against children (n=47) at pre-treatment, mid-treatment, and post-treatment. Both studies supported the validity and reliability of the adapted Stages of Change Questionnaire, and the influence of social desirability upon responding was less than expected. The results of this investigation supported the potential utility of the Stages of Change Questionnaire as a measure of motivation for behaviour change for sex offenders against children.

Sitting behaviour-based pattern recognition for predicting driver fatigue

The proposed approach based on physiological characteristics of sitting behaviours and sophisticated machine learning techniques would enable an effective and practical solution to driver fatigue prognosis since it is insensitive to the illumination of driving environment, non-obtrusive to driver, without violating driver’s privacy, more acceptable by drivers.

Reliability and validity of the transport and physical activity questionnaire (TPAQ) for assessing physical activity behaviour

No current validated survey instrument allows a comprehensive assessment of both physical activity and travel behaviours for use in interdisciplinary research on walking and cycling. This study reports on the test-retest reliability and validity of physical activity measures in the transport and physical activity questionnaire (TPAQ).

Satisfaction, complaining behaviour and repurchase: an empirical study of a subscription service

The aims of this research were to examine the relationships between customer satisfaction, customer complaint behaviour, service recovery and the intention to repurchase in the Australian Pay TV industry. A survey of 171 respondents suggested that overall customer satisfaction was the main driver of the likelihood of disconnection from the Pay TV service. Those respondents who reported having a problem but not complaining directly about it were significantly more likely to have the intention to disconnect in the future than those who complained directly to their Pay TV service provider. However, there was no significant difference in terms of perceptions of overall satisfaction between those who had a problem and complained and those who had a problem and chose not to complain.

Interpersonal trust and control behaviour of Chinese managers

Interpersonal trust is believed to influence the management and control of organisations in China. China's importance as a host country for foreign direct investments (FDIs) through multinational company subsidiaries (MNCs) and international joint ventures (IJVs) is growing rapidly. MNCs and INs located in China often employ local Chinese managers to control their subsidiaries or ventures. This makes it essential for designers of management control systems to have an understanding of the interpersonal trust-sensitive control behaviour of Chinese managers. One of the important aspects of control behaviour is how managers control their subordinates.

This paper examines the relationship between Chinese managers' trust in subordinates and their (Chinese managers') control behaviour towards the subordinates. On the basis of a questionnaire survey of a cohort of managers from Beijing, the study explores the effects of trust on the use of social controls, formal controls, and monitoring.

The findings of this study indicate that a manager's high (low) trust in a subordinate is associated with a low (high) level of monitoring, a high (high) level of social control and a high (low) level of perceived performance. The hypothesis that a superior's high (low) level of trust is associated with a low (high) level of reliance on formal controls was not supported. These findings, while indicative of control behaviour of Chinese managers in particular, also add to the growing academic literature on trust and control in general. In a practical sense, an
understanding of the trust-sensitive control behaviour of Chinese managers is particularly useful in designing and implementing effective control systems for international organisations operating in China.

Early detection of emotional and behavioural problems in children with diabetes: the validity of the child health questionnaire as a screening instrument

Aims: To assess the validity of the Child Health Questionnaire (CHQ) as a screening tool for detecting 'at risk' emotional and behavioural  maladjustment in children with diabetes, using the Behaviour Assessment System for Children (BASC) as a gold standard measure. Methods: CHQ and BASC were administered to 103 parents of children with Type 1 diabetes, aged 7–12 years. Sub-scales of the two measures were compared using Pearson's bivariate correlations. CHQ sensitivity and specificity cut-points were optimized against the BASC borderline category using receiver operating characteristic curves. Results: The BASC Externalizing Problems scale correlated strongly with CHQ Behaviour, Global Behaviour, Mental Health, Family Activities and Family Cohesion scales (r-values −0.68, −0.54, −0.51, −0.59, and −0.42, respectively). BASC Internalizing Problems scale correlated strongly with CHQ Behaviour, Mental Health and Family Cohesion scales (r-values −0.40, −0.43 and −0.45, respectively). Using receiver operating characteristic curve analysis, the CHQ Mental Health scale most effectively identified children classified as borderline on the BASC Internalizing Problems scale (sensitivity 87%, specificity 78%), while the CHQ Global Behaviour scale most effectively identified children classified as borderline on the BASC Externalizing Problems scale (sensitivity 73%, specificity 82%). Conclusions: Significant correlations were seen between the CHQ Global Behaviour and Mental Health scales and the BASC Externalizing and Internalizing scales, respectively. Sequential use of the CHQ, as a screening tool, followed by an established mental health measure such as the BASC, may help identify children with diabetes 'at risk' for chronic maladjustment and poor health outcomes.

Development of a professional practice audit questionnaire for mental health nursing in Aotearoa/New Zealand

This paper reports the three-stage development of a professional practice audit questionnaire for mental health nursing in Aotearoa/New Zealand. In Study 1, clinical indicator statements (n = 99) generated from focus group data, which were considered to be unobservable in the nursing documentation in consumer case notes, were included in a three-round Delphi process. Consensus of ratings occurred for the mental health nurse and academic participants (n = 7) on 83 clinical indicator statements. In Study 2, the clinical indicator statements (n = 67) that met importance and consensus criteria were incorporated into a questionnaire, which was piloted at a New Zealand mental health service. The questionnaire was then modified for use in a national field study. In Study 3, the national field study, registered mental health nurses (n = 422) from 11 New Zealand District Health Board mental health services completed the questionnaire. Five categories of nursing practice were identified: professional and evidence-based practice; consumer focus and reflective practice; professional development and integration; ethically and legally safe practice; and culturally safe practice. Analyses revealed little difference in the perceptions of nurses from different backgrounds regarding the regularity of the nursing practices. Further research is needed to calibrate the scores on each clinical indicator statement with behaviour in clinical practice.