Aggregation of fuzzy preferences: Some rules of the mean

This paper studies by means of reciprocal fuzzy binary relations the aggregation of preferences when individuals show their preferences gradually. We have characterized neutral aggregation rules through functions from powers of the unit interval in the unit interval. Furthermore, we have determined the neutral aggregation rules that are decomposable and anonymous. In this class of rules, the collective intensity of preference is the arithmetic mean of the values assigned by a function to the individual intensities of preference. We have also considered the neutral aggregation rules based on quasiarithmetic means. We have established that this class of rules generalizes the simple majority, when individuals have ordinary preferences and collective preferences are reciprocal. Received: 23 April 1999/Accepted: 25 September 1999     

Salient Value Similarity, Social Trust, and Risk/Benefit Perception

It was postulated that shared values determine social trust in institutions and persons related to a technology: One has trust in people holding similar salient values. Furthermore, it was hypothesized that social trust has a positive influence on perceived benefits and a negative impact on perceived risks. Results of a survey of University of Zürich students indicated that the proposed causal model explained perception of pesticides, nuclear power, and artificial sweetener very well. When social trust was controlled, the relation between risks and benefits perceived diminished. Results indicate that social trust is a key predictive factor of the perceived risks and benefits of a technology, and provide support for the salient values similarity theory of social trust.     

Readiness for independent living of youth in residential childcare: A comparative study

Transition to adulthood is an accelerated and early process for care leavers that requires intensive preparation, training and support from child welfare services. This study aimed to explore the perceived readiness for independent living of a group of care-experienced young people preparing for leaving care in Spain and to compare it with the perceptions of their peers from the general population. A sample of 508 youth (50% women) aged 14–21 (M = 16.67; SD = 1.72) took part, of whom 279 were care experienced and 229 belonged to the general population in Spain. Participants' independent living skills, personal autonomy, self-efficacy and sociodemographic characteristics were assessed through an online survey using standardized instruments. Care-experienced young people displayed higher levels of life skills and autonomy in self-care, daily living at home and employment domains, but not related to making daily arrangements in their community. However, their educational level and self-efficacy levels were lower than in the comparison group. Work experience stood out as a significant predictor of care-experienced young people's life skills level. These findings support the importance of assessing life skills as an outcome of leaving care preparation services and providing care-experienced young people with real-life experiences to develop their life skills.     

Connecting the Dots: Do Financial Analysts Help Corporate Boards Improve Corporate Social Responsibility?

This paper presents an examination of the joint impact of board structural elements at firm level and financial analysts as market-level corporate governance (CG) on corporate social responsibility (CSR) performance. Our study contributes to the CG–CSR literature by adopting the bundling approach, a perspective that has recently attracted researchers’ attention as an answer to any heterogeneity and fragmentation in existing findings. It is based on an extensive sample consisting of 7,739 firm-year observations of US firms for the 2006–2015 period. The findings suggest that financial analysts complement the corporate board with more independence, gender diversity and a specialized CSR committee to realize a certain level of CSR performance of a firm. The findings also indicate that analysts substitute for those internal governance factors that are associated with weaker boards – larger sizes and dual-role CEOs. We also draw implications for research and practice from our findings.     

Contact visits between foster children and their birth family: the views of foster children,foster parents and social workers

It has been argued that contact visits between foster children and birth parents can help maintain attachment bonds and support the child's development. However, some research suggests that such visits can be detrimental. This study analyses the characteristics of contact visits and examines children's perceptions of the emotional relationship they have with foster carers and their biological parents. Participants were 104 non‐kinship foster children and their respective foster carers and social workers. Fifty‐six of these foster children had contact visits with their birth parents. Foster children rated the quality of their relationship with foster carers and birth parents using the Affect Scale. Foster children, foster carers and social workers all completed the Evaluation of Contact Visits Questionnaire. Results showed that (i) a high proportion of children had no contact visits; (ii) the contact agreement was often not fulfilled; (iii) many visits were rated as poor quality; (iv) foster carers' evaluation of visits was more negative than that of both foster children and social workers; and (v) children who experienced poor‐quality visits and perceived less warmth and more criticism/rejection from their parents. These results highlight the need to improve contact visits by developing intervention strategies targeted at all those involved.     

Exploring the requirements for multimodal interaction for mobile devices in an end-to-end journey context

The paper investigates the requirements for multimodal interaction on mobile devices in an end-to-end journey context. Traditional interfaces are deemed cumbersome and inefficient for exchanging information with the user. Multimodal interaction provides a different user-centred approach allowing for more natural and intuitive interaction between humans and computers. It is especially suitable for mobile interaction as it can overcome additional constraints including small screens, awkward keypads, and continuously changing settings - an inherent property of mobility. This paper is based on end-to-end journeys where users encounter several contexts during their journeys. Interviews and focus groups explore the requirements for multimodal interaction design for mobile devices by examining journey stages and identifying the users' information needs and sources. Findings suggest that multimodal communication is crucial when users multitask. Choosing suitable modalities depend on user context, characteristics and tasks.     

Participatory ergonomics and design of technical assistance

This work describes the experience of application of a procedural initiative, which aimed to identify and address technical assistance needs progressively in therapy and rehabilitation activities. The proposal theoretical axes are the basics of participatory ergonomics and interdisciplinary work, was raised with the intention of addressing important issues for the entire design process including: perception, attention, memory and human being comfort, and the interrelationships that create objects in the context in which they are used. This project was done in collaboration with leading institutes for the rehabilitation of Colombia: Cirec and Roosevelt, through two investigative stages: a first ethnographic stage, during which were observed one hundred forty four (144) procedures of rehabilitation and therapy to build a bank of assistive technology needs, justified on the project observation variables. And a second stage of action research in which they were designed elements that facilitate the implementation of rehabilitation procedures efficiently. Currently being developed experiential situations in different hospitals to examine the reliability of the proposed solutions.     

Construction of a survey to assess workload and fatigue among AMT operators in Mexico

Operators of machinery classified as Advanced Manufacturing Technology (AMT) are exposed to high levels of workload and fatigue. However, only few studies have been conducted on this topic in Hispanic-American countries workers. Several instruments be used to assess workload and fatigue; however, only few of them have been adapted to Spanish language. This paper reports on the development and validity testing of a survey instrument in Spanish, aiming to subjectively assess workload and fatigue among AMT operators in Mexico. Method: After an exhaustive literature review in search of already available measurement instruments, they were adapted for content and later translated into Spanish; a pilot test was conducted to evaluate validity and reliability; afterwards appropriate modifications were made to the testing instruments. Final version of the instrument was applied to a group of 121 operators of CNC lathes. Reliability was analyzed using KMO and Cronbach alpha indices. Results: For the assessment of workload, both NASA-TLX and ISTAS 21 methods were incorporated to the survey instrument. As for fatigue assessment tools, these were SOFI-S, FAS and OFER questionnaires. Results show KMO value and Cronbach alpha above 0.6.Conclusions. The survey instrument as designed, allows the collection of reliable and valid data regarding workload and fatigue among AMT operators in Mexico.     

Ergoecology: evolution and challenges

This work details the conceptual and methodological evolution of 'Ergoecology' and its relationship to certain comparable disciplinary proposals and standards, with a view to making its current status known and fostering discussion and development of it in a broader context. 'Ergoecology' is a discipline which relates the ergonomic system to 'environmental factors', stressing the relationships between ecological-geographical aspects and human activities. After analyzing previously-developed and partially-validated methods, strengths are established, together with areas where there is room for improvement, based on conceptual validity. The objectives, principles, and premises of 'Ergoecology' will be revised and therefore it will be able to be compared with other disciplinary and regulatory developments. Finally, new concepts and notions are proposed, together with basic principles and axioms that will enable 'Ergoecology' to advance in both, the theoretical and the practical dimensions, leaving the door open to be disseminated and applied.