Effect of chevron design on driver behaviour when encountering and passing through a dangerous curve

Horizontal curves are locations on the road network with a high road accident risk. In order to provide drivers with timely and proper information about the upcoming curve, road authorities often use chevron signs. Although the main design of chevrons is similar in most countries (one colour for the background and another for the arrow), the combination of colours differs. The aim of this simulator study is to investigate how different colour combinations affect drivers when they encounter and drive through horizontal curves on rural roads at daytime. Overall, each of the tested chevrons reduced the driving speed (between 25 and 29 km/h), although not to the speed limit level (60 km/h). However, for curves marked with chevrons with fluorescent or white background the driving speed was the lowest at all measuring points, regardless of the curve direction. The observation of lateral movement shows that there are no significant differences in the way the vehicle is positioned when approaching and driving through curves marked with different chevrons. Based on the obtained results, practical recommendations and potential future research activities are presented.     

Effect of motorcycle lighting configurations on drivers’ perceptions of closing during nighttime driving

ObjectiveThe aims were to better understand how drivers perceive an approaching set of motorcycle headlights during nighttime driving and to determine whether alternative motorcycle headlight configurations improve drivers’ perceptual judgments of closing for an oncoming motorcycle.BackgroundMotorcyclists account for a disproportionate number of roadway fatalities, especially at night. One potential cause of this is drivers’ misjudgments of a motorcycle’s approach.MethodThe first experiment examined whether drivers were more sensitive to horizontal or vertical optical expansion and whether drivers could integrate these two dimensions to achieve a lower looming threshold. A second experiment built on these results to test whether alternative headlight configurations that maximized size were better than other motorcycle headlight configurations and a car’s headlights. In both experiments, participants were instructed to press a button to indicate when they first perceived an oncoming vehicle to be closing under nighttime driving conditions.ResultsHeadlight orientation did not affect when drivers perceived closing, and drivers were not able to integrate optical expansion from multiple dimensions in a way that achieves a lower looming threshold. However, the alternative motorcycle headlight configurations that accentuated the full extent of a motorcycle’s size resulted in drivers perceiving closing sooner than other motorcycle headlight configurations but not sooner than a car.ConclusionDrivers perceive closing sooner for larger headlight configurations except when the headlight configurations are relatively small, in which case the effect of headlight size is attenuated.ApplicationDrivers’ perceptual judgments of motorcycles may improve when motorcycles have headlights that span its full height.     

Self-talk and softball performance: The role of self-talk nature,motor task characteristics,and self-efficacy in novice softball players

ObjectivesTo determine the effect of self-talk on softball throwing performance. Additionally, two moderators, nature of self-talk and type of motor task, as well as a potential mediator of self-efficacy were examined.DeignAn experimental, within-subjects, and counterbalanced design.MethodsForty-two senior high students (mean age = 17.48 ± 0.55) were instructed to use instructional, motivational, and unrelated self-talk with counterbalanced order prior to softball throwing for accuracy and distance tasks.ResultsBoth instructional and motivational self-talk conditions had better performance than unrelated self-talk on softball throwing accuracy, whereas motivational self-talk had better performance than both instructional and unrelated self-talk in softball throwing for distance. Results for self-efficacy were similar, with self-efficacy for accuracy performance higher in both instructional and motivational self-talk conditions than with unrelated self-talk, while self-efficacy was highest in the motivational self-talk condition and lowest with unrelated self-talk. Significant correlations between self-efficacy and motor performance were also found with both tasks.ConclusionThese findings partially support the task-matching hypothesis, confirm the moderator role of type of self-talk and task type, suggest that self-efficacy has a mediator role, and provide direction for self-talk effectiveness.     

Job skill discretion and emotion control strategies as antecedents of recovery from work

Recovery from work protects employees’ health and well-being, and therefore it is important to understand its antecedents. The aim of this study conducted among 183 middle-aged participants drawn from the Finnish Jyväskylä Longitudinal Study of Personality and Social Development was to examine whether job skill discretion and emotion control strategies (emotional rumination and emotional inhibition) are related to psychological aspects of recovery from work (subjective recovery evaluation, psychological detachment and relaxation). The results of hierarchical general linear models confirmed the hypothesis that job skill discretion is positively associated with subjective recovery evaluation and relaxation. As expected, high emotional rumination predicted difficulties in psychological detachment and relaxation. Emotional inhibition moderated the relationship between job skill discretion and psychological detachment: where emotional inhibition was at a moderate level, job skill discretion was positively related to psychological detachment. The findings suggest that not only job characteristics but also individual factors contribute to recovery, revealing practical implications for employees, employers and occupational health care professionals seeking to promote employees’ work ability, health and well-being.     

Skills and Knowledge - Nothing but Memory?

The aim of this article is to enquire into neuroscientific research on memory and relate it to topics of skill, knowledge and consciousness. The article outlines some contemporary theories on procedural and working memory, and discusses what contributions they give to sport science and philosophy of sport. It is argued that memory research gives important insights to the neuronal structures and events involved in knowledge and consciousness contributing to sport skills, but that these explanations are not exhaustive. The article argues that phenomenal consciousness in skills is not explained by the neuroscience of memory, and hence neither are skills.     

One-year retention of general and sequence-specific skills in a probabilistic,serial reaction time task

Procedural skills such as riding a bicycle and playing a musical instrument play a central role in daily life. Such skills are learned gradually and are retained throughout life. The present study investigated 1-year retention of procedural skill in a version of the widely used serial reaction time task (SRTT) in young and older motor-skill experts and older controls in two experiments. The young experts were college-age piano and action video-game players, and the older experts were piano players. Previous studies have reported sequence-specific skill retention in the SRTT as long as 2 weeks but not at 1 year. Results indicated that both young and older experts and older non-experts revealed sequence-specific skill retention after 1 year with some evidence that general motor skill was retained as well. These findings are consistent with theoretical accounts of procedural skill learning such as the procedural reinstatement theory as well as with previous studies of retention of other motor skills.     

Dreyfus and Deleuze on L’habitude,Coping, and Trauma in Skill Acquisition

Abstract

One of the more important and under‐thematized philosophical disputes in contemporary European philosophy pertains to the significance that is given to the inter‐related phenomena of habituality, skilful coping, and learning. This paper examines this dispute by focusing on the work of the Merleau‐Ponty and Heidegger‐inspired phenomenologist Hubert Dreyfus, and contrasting his analyses with those of Gilles Deleuze, particularly in Difference and Repetition. Both Deleuze and Dreyfus pay a lot of attention to learning and coping, while arriving at distinct conclusions about these phenomena with a quite different ethico‐political force. By getting to the bottom of the former, my hope is to problematize aspects of the latter in both philosophers’ work. In Deleuze’s case, it will be argued that he adopts a problematic position on learning that is aptly termed ‘empirico‐romanticism’. While I will agree with the general thrust of Dreyfus’ foregrounding of habit and skilful coping, even in the political realm, it will also be argued that there are some risks associated with his view, notably of devolving into a conservative communitarianism.     

The Development of Expertise: Animal Models?

There is a continuing debate in the psychological literature between researchers who lean more toward learning theories of expertise development and those who lean more toward talent theories. However, the development of human expertise has not been open to direct experimental methods and will probably continue to elude experimentalists in the future. A promising alternative to direct experimental methods is to use nonhuman animal models, a possibility that researchers in expertise seem to have overlooked. However, there are studies in the animal behavior literature that address the development of nonhuman animal expertise without specifically referring to the topic as expertise. In the present study, the author discusses two nonhuman animal examples of expertise development that have been researched by ethologists. Nonhuman animal expertise development, unlike human expertise development, is subject to direct experimentation. The author thus recommends that researchers use nonhuman animals in their studies of expertise.     

Social Adjustment,Academic Adjustment,and the Ability to Identify Emotion in Facial Expressions of 7-Year-Old Children

The authors aimed to examine the possible association between (a) accurately reading emotion in facial expressions and (b) social and academic competence among elementary school-aged children. Participants were 840 7-year-old children who completed a test of the ability to read emotion in facial expressions. Teachers rated children's social and academic behavior using behavioral rating scales. The authors found that children who had more difficulty identifying emotion in faces also were more likely to have more problems overall and, more specifically, with peer relationships among boys and with learning difficulties among girls. Findings suggest that nonverbal receptive skill plays a significant role in children's social and academic adjustment.