Force and Directional Force Modulation Effects on Accuracy and Variability in Low-Level Pinch Force Tracking

The authors investigated how varying the required low-level forces and the direction of force change affect accuracy and variability of force production in a cyclic isometric pinch force tracking task. Eighteen healthy right-handed adult volunteers performed the tracking task over 3 different force ranges. Root mean square error and coefficient of variation were higher at lower force levels and during minimum reversals compared with maximum reversals. Overall, the thumb showed greater root mean square error and coefficient of variation scores than did the index finger during maximum reversals, but not during minimum reversals. The observed impaired performance during minimum reversals might originate from history-dependent mechanisms of force production and highly coupled 2-digit performance.     

Examining the association between psychological wellbeing with daily and intra-individual variation in subjective wellbeing

A number of studies identify distinct dimensions of psychological and subjective wellbeing. However, few investigations have examined how these distinctive wellbeing dimensions may be related over time. The present study aimed to contribute to this growing body of research by adopting a measurement burst design to examine the association between psychological functioning with daily and intra-individual variation in affect over a 14-day period, controlling for personality. Participants (N = 45) comprised a sample of Australian adults from Canberra, Australia who were observed on up to 14 days over a 2-week period (Mobs = 10.9 (SD = 3.1)). Maximum Likelihood (ML) estimates from a multi-level structural equation model identified psychological functioning as only weakly associated with daily positive affect, and unrelated to daily levels of negative affect and intra-individual variation in both affect domains when adjusting for demographic, personality and daily stressors. Positive and negative daily events were most strongly associated with positive and negative feelings, respectively. Post-hoc analysis within a Bayesian context confirmed our ML results whilst a Monte Carlo simulation identified sufficient statistical power of significant parameters. Overall, evidence for an association between psychological functioning and daily affect was not identified.     

Sex Differences in Variability in Vocational Interests: Evidence from Two Large Samples

Greater male variability has been established in cognitive abilities and physical attributes. This study investigated sex differences in variability in vocational interests with two large samples (N > 40 000 and N > 70 000). The results show that although men varied more in Realistic and Enterprising interests, women varied more in Artistic and Conventional interests. These differences in variability had considerable influence on the female–male tail ratios in vocational interests that have been found to contribute to reported gender disparities in certain fields of work and academic disciplines. Moreover, differences in means and variability interacted non‐linearly in shaping tail‐ratio imbalances. An age‐specific analysis additionally revealed that differences in variability diminished with age: Older samples showed smaller differences in variance in Realistic, Artistic, and Social interests than younger samples. Thus, I found no evidence that greater male variability applies for vocational interests in general. Copyright © 2015 European Association of Personality Psychology     

Translating the QABF to Spanish with an Eye Toward Reliability and Validity

We developed a Spanish‐language version of the Questions About Behavioral Function (QABF) utilizing a forward‐adaptation and back‐adaptation translation process. Subsequently, we administered the assessment with 80 bilingual participants to assess the reliability and validity of the instrument. Results demonstrated that the Spanish version of the QABF was both reliable (i.e., was internally consistent) and valid (i.e., identified the correct function). Implications and future research are discussed. Copyright © 2014 John Wiley & Sons, Ltd.     

The role of preference in speed choice

Individual differences with regard to speed preference may be a source of speed heterogeneity and conflicts in traffic, such as tailgating and dangerous overtaking. The main aim of the current study was to explore drivers’ speed preferences when driving for different reasons (saving money on fuel, driving safely, driving for fun or driving as usual) and the relationship of these preferences to observed speeds and self-reported speed. 193 drivers were interviewed at five different locations, and were asked about their speeds on roads they had just travelled. Drivers’ speeds on these roads were also sampled with a speed gun. The results showed large differences between speeds chosen for different driving purposes; the lowest speeds were chosen when the goal was economy and the highest when driving for fun. In addition, there were individual differences in speed preferences such that some drivers indicated that their usual speed was above what they believed was a safe speed while others indicated that they usually drove even slower than what they thought was safe. These differences may account for much of the speed heterogeneity observed in on-road behaviour. The results also showed that drivers’ speed choices are highly influenced by their usual speeds, even more so than their beliefs regarding what constitutes a safe speed, which may help explain non-compliance with speed limits. No relationship was found between speed choice and risk perception.     

Heterodox Economics,Social Ethics,and Inequalities

Research in the cognitive sciences indicates that metaphors significantly shape perceptions and approaches to problem solving. With this in mind, this essay argues that it is problematic for ethicists that mainstream economics and other social scientific literature relies on naturalistic metaphors to describe markets. These imply an inaccurate picture of economic phenomena and rhetorically frame many solutions to problems such as inequality as interventionist. This essay proposes that religious ethicists may find resources for avoiding this conceptual hazard in emerging fields of heterodox economics that are attentive to the role of culture and human agency in shaping markets. It introduces feminist, behavioral, institutional, and Austrian economics in particular and highlights some of the specific approaches to inequality adopted in these fields. It then suggests that engaging heterodox perspectives more generally may help ethicists keep in view the full complexity and social nature of the economic problems they analyze.     

病人临终决策中的自主问题辨析

自主在医学伦理学中是一个重要的概念。在临终决策中,必须对病人自主从主体自主和行为自主两个维度加以区分,并强调缺乏内外部约束的重要性,尽管内部约束对病人自主影响巨大,但它并不会破坏临终决策的行为自主。在回顾两种反对将行为自主作为理解临终决策手段的意见基础上,应当实现行为自主的标准从完全自主向充分自主的转变,充分自主的优势在于它对各种医疗环境和背景条件所表现出的适应性。根据这一标准,诸如临终病人的死亡选择并不需要完全自主,充分自主即可。