Moving Between Automated and Manual Driving: Mental Workload and Performance Implications

Automated driving has been predicted to take-over from manual vehicle control in the near future. The driver’s role may then change from active operator to passive observer. Such technology offers the tantalising promise of improving driving safety. However, many studies have presented findings suggesting potentially adverse effects from automated driving systems, e.g., reduced situation awareness. Mental workload is also a key issue of concern for researchers in this area. Excessive mental workload has repeatedly been shown to be associated with degraded driving performance. Previously, most traffic psychology studies on mental workload have focused the manual driving task. However, a shift to (and from) highly automated driving will impose differing cognitive demands on the driver. For example, mental workload levels are likely to shift from underload to overload and visa-versa. Rapid resumption of manual control from a highly automated observation role seems inevitable on the basis of equipment failure or adverse conditions. Consequently, how driving performance will be effected; how it will effect driver mental workload; and how to protect road users from such system failures, are the interesting questions of concern. The aims of this experimental study are to determine the effects of control state changes (automated to manual, and manual to automated) on driver mental workload and driving performance. Participants will perform several counterbalanced driving transition scenarios (shifting between manual driving, highly automated driving and fully automated driving) in driving simulator. Dependent variables will include subjective mental workload measures, eye tracking, driving performance measures and performance on a secondary loading task. The results of this study are anticipated to provide insight into the human-machine interaction system with respect to mental workload and driving performance. Findings will contribute to our understanding of the implications of control state changes in automated driving scenarios. For example, shifting into or out of, automated driving modes. More generally, we anticipate findings could support vehicle designers by improving their understanding of the limitations of automated driving systems with respect to driver mental workload

Group size and personalization’s effect on Facebook message response rates

Purpose The bystander effect is one of the most well researched and replicated phenomena in social psychology. It repeatedly shows that the presence of other people inhibits the impulse to help due to the concept of diffusion of responsibility. Recently, researchers have studied this phenomenon online in the context of e-mails, internet chat rooms, and discussion forums. The results provide evidence that the presence of “virtual” others decreases the likelihood of helping behavior. Personalization is another factor that strongly influences helping behavior. Referring to a person by name when soliciting help request increases the likelihood of receiving assistance. Yet, with the most popular activity on the internet now being social media, it would be beneficial to know if diffusion of responsibility and personalization also occurs in this part of the online world. The paper aims to discuss these issues. Design/methodology/approach To investigate the validity of diffusion of responsibility as well as personalization in a social media context, 176 participants sent out one private Facebook message soliciting help in the form of an online survey to one, three, six, or nine of their Facebook friends. They greeted their friend(s) by name or just said “Hi” or “Hi all.” Findings Responses to the survey provided strong support for personalizing the greeting, but did not support the theory of diffusion of responsibility. Practical implications This study has many practical implications. For one, with social media being used not only by individuals but by businesses and industries, it is important to know the most effective way in eliciting help and responses from individuals. It is also beneficial for researchers as well who are increasingly using social media as a recruitment tool to find participants. This study suggests that personalizing salutations is an effective way of eliciting more responses and raises important research questions about the validity of diffusion of responsibility in online environments. Originality/value This study also has originality and value in that it provides a start for understanding helping behavior in a social media environment as well as applying relevant social psychological theories to online behavior. It highlights the similarities as well as differences between offline and online human behavior as well as highlights the importance of personalization in online requests. </jats:sec

Analysing end-user energy rescheduling intentions using signal detection theory

AbstractTwo interfaces, co-created by designers and people living in eco-villages, were tested for their effects on end-user energy-use rescheduling intentions. When analysed with Signal Detection Theory both interfaces were implicated in biased user responses, but in opposite directions. Despite some favourable behavioural effects the majority of the 75 respondents chose not to reschedule their energy-use behaviours no matter what interface was displayed. The paper provides a demonstration of the role of behavioural factors in the apparently simple task of providing more information to energy-users on the assumption behaviour will change

A randomised control crossover trial of a theory based intervention to improve sun-safe and healthy behaviours in construction workers:Study protocol

Abstract Background Exposure to sunlight can have both positive and negative health impacts. Excessive exposure to ultra-violet (UV) radiation from the sun can cause skin cancer, however insufficient exposure to sunlight has a detrimental effect on production of Vitamin D. In the construction industry there are onsite proactive behaviours for safety, but sun-safety remains a low priority. There is limited research on understanding the barriers to adopting sun-safe behaviours and the association this may have with Vitamin D production. This paper reports a protocol for an intervention study, using text messaging in combination with a supportive smartphone App. The intervention aims to both reduce UV exposure during months with higher UV levels and promote appropriate dietary changes to boost Vitamin D levels during months with low UV levels. Method/design Approximately 60 construction workers will be recruited across the United Kingdom. A randomised control crossover trial (RCCT) will be used to test the intervention, with randomisation at site level – i.e. participants will receive both the control (no text messages or supportive App support) and intervention (daily text messages and supportive App). Using the Theory of Planned Behaviour (TPB) the intervention focuses on supporting sun-safety and healthy dietary decisions in relation to Vitamin D intake. The intervention emphasises cultivating the perception of normative support in the workplace, increasing awareness of control and self-efficacy in taking sun-protective behaviours, making healthier eating choices to boost Vitamin D, and tackling stigmas attached to image and group norms. Each study epoch will last 21 days with intervention text messages delivered on workdays only. The supportive App will provide supplementary information about sun protective behaviours and healthy dietary choices. The primary outcome measure is 25-hydroxy-Vitamin D [25(OH)D] level (obtained using blood spot sampling), which will be taken pre and post control and intervention periods. Secondary outcome measures are two-fold, (1) using the TPB to detect changes in behaviour, and (2) quantifying UV exposure during the UK peak radiation season (April–September) using body-mounted UV sensors. Discussion This study will provide important information about the effectiveness of a technology-based intervention to promote sun-safety and healthy behaviours in outdoor construction workers. Trial registration ISRCTN15888934 retrospectively registered 15.01.2018

The impact of immediate breast reconstruction on the time to delivery of adjuvant therapy: the iBRA-2 study

Background: Immediate breast reconstruction (IBR) is routinely offered to improve quality-of-life for women requiring mastectomy, but there are concerns that more complex surgery may delay adjuvant oncological treatments and compromise long-term outcomes. High-quality evidence is lacking. The iBRA-2 study aimed to investigate the impact of IBR on time to adjuvant therapy. Methods: Consecutive women undergoing mastectomy ± IBR for breast cancer July–December, 2016 were included. Patient demographics, operative, oncological and complication data were collected. Time from last definitive cancer surgery to first adjuvant treatment for patients undergoing mastectomy ± IBR were compared and risk factors associated with delays explored. Results: A total of 2540 patients were recruited from 76 centres; 1008 (39.7%) underwent IBR (implant-only [n = 675, 26.6%]; pedicled flaps [n = 105,4.1%] and free-flaps [n = 228, 8.9%]). Complications requiring re-admission or re-operation were significantly more common in patients undergoing IBR than those receiving mastectomy. Adjuvant chemotherapy or radiotherapy was required by 1235 (48.6%) patients. No clinically significant differences were seen in time to adjuvant therapy between patient groups but major complications irrespective of surgery received were significantly associated with treatment delays. Conclusions: IBR does not result in clinically significant delays to adjuvant therapy, but post-operative complications are associated with treatment delays. Strategies to minimise complications, including careful patient selection, are required to improve outcomes for patients

The Essential Elements of a Risk Governance Framework for Current and Future Nanotechnologies

Societies worldwide are investing considerable resources into the safe development and use of nanomaterials. Although each of these protective efforts is crucial for governing the risks of nanomaterials, they are insufficient in isolation. What is missing is a more integrative governance approach that goes beyond legislation. Development of this approach must b