Daily relations between social perceptions and physical activity among college women

ObjectivesThere is a need to develop more effective physical activity (PA) promotion programs for college women. Theory and evidence suggest that perceptions of the social environment play a role in college women’s PA, though little is known about how these perceptions are associated with PA at the day level. The goal of this study was to examine relations between changes in college women’s daily social perceptions and objectively assessed PA over seven days.DesignDaily diary method.MethodCollege women (n = 80, M_Age = 20, M_BMI = 23.1 kg/m²) wore Fitbit wristbands and completed daily self-reports of (1) the quantity and perceived intensity of their social interactions (positive/negative), and (2) the occurrence of social comparisons (based on appearance/health/status) for seven days.ResultsMultilevel models showed daily variability in predictors and outcomes (ps < 0.0001), as well as relations between within-person changes in social perceptions and PA. Increases in negative interactions (particularly those with friends) were consistently associated with decreases in daily PA, whereas increases in positive interactions showed limited relations (srs = −0.22-0.34). Days with health comparisons were days with greater PA for women who had stronger overall interest in comparisons, but were days with less PA for women with weaker overall interest (srs = 0.22–0.33). PA did not differ between days with vs. without appearance comparisons.ConclusionsSocial perceptions show meaningful day-to-day variability and relations with college women’s daily PA, and specific associations may be useful for improving tailored interventions for college women.     

大学生恋爱状态与外表拒绝敏感性：外表吸引力自我觉知的中介作用

主要探讨大学生恋爱状态（恋爱中或单身）、个体外表吸引力自我觉知与外表拒绝敏感性之间的关系。采用恋爱状态问卷、外表拒绝敏感性量表、拒绝敏感度量表、基于外表的社会比较以及吸引力自评等测量工具,以班级为单位向随机选取的北京、四川以及安徽等地多所高校大学生进行施测,有效被试549人。结果发现：（1）大学生恋爱状态、外表吸引力自我觉知和外表拒绝敏感性之间相关显著;（2）大学生恋爱状态能够显著正向预测外表吸引力自我觉知,也能显著负向预测外表拒绝敏感性;（3）外表吸引力自我觉知在恋爱状态与外表拒绝敏感性之间具有显著的完全中介作用（间接效应值为0.47）,恋爱状态通过提升个体主观评估的外表吸引力,从而降低外表拒绝敏感性。     

祖辈共同养育模式下幼儿母子依恋对问题行为的影响：祖孙依恋的中介作用

采用幼儿依恋量表和儿童行为量表（Child Behavior Checklist, CBCL）测量265名祖辈共同养育幼儿的母子依恋、祖孙依恋和问题行为的情况,考察祖辈共同养育幼儿的祖孙依恋在母子依恋与问题行为的中介作用。结果发现：（1）祖辈共同养育幼儿的母子依恋与祖孙依恋呈显著正相关,幼儿的母子依恋与内化问题行为、外化问题行为呈显著负相关,幼儿的祖孙依恋与内化问题行为、外化问题行为呈显著负相关;（2）祖辈共同养育幼儿的祖孙依恋完全中介母子依恋对内化问题行为、外化问题行为的影响。     

儿童的孤独感及与同伴交往的关系

孤独感是当一个人的社会关系网络比预期的更小或更不满意时产生的一种不愉快的情绪体验,儿童长期处于此状态会导致适应不良。孤独感的社交需要理论认为孤独感是对社交需要未满足的反应,强调孤独感的情感或感受层面;认知加工观主张孤独感的产生是因为个体对觉知到的人际关系现状不满意,强调孤独感的认知成分。同伴交往4个水平上的变量会影响到孤独感的产生,而孤独感作为一种消极的情绪体验,也会对同伴交往产生不良影响。未来研究应该多从家庭功能与同伴交往相结合的角度探讨孤独感的产生机制,对孤独儿童的干预研究也有待开展     

Task difficulty and inertial properties of hand-held tools: An assessment of their concurrent effects on precision aiming

Aiming hand-held tools at targets in space entails adjustments in the dynamical organization of aiming patterns according to the required precision. We asked whether and how these adjustments are modified by the tool’s mass distribution. Twelve participants performed reciprocal aiming movements with a 50-cm long wooden probe. Kinematic patterns of probe movements were used as a window into the behavioral dynamic underlying performance of a reciprocal aiming task. We crossed three levels of task difficulty (IDs 2.8, 4.5 and 6.1) with two types of probe varying in their mass distribution (proximal vs distal loading). Movement duration was affected by task difficulty and probe loading (shorter for larger targets and proximal probe loading). Progressive deviations from a sinusoidal movement pattern were observed as task difficulty increased. Such deviations were more pronounced with proximal probe loading. Results point to a higher degree of non-linearity in aiming dynamics when the probe was loaded proximally, which might reflect employment of additional perceptual-motor processes to control the position of its less stable tip at the vicinity of the targets. More generally, the effects of probe loading on aiming pattern and dynamics suggest that perceptual-motor processes responding to task level constraints are sensitive to, and not independent from, biomechanical, end-effector constraints.     

Listenmee® and Listenmee® smartphone application: Synchronizing walking to rhythmic auditory cues to improve gait in Parkinson’s disease

Evidence supports the use of rhythmic external auditory signals to improve gait in PD patients (Arias & Cudeiro, 2008; Kenyon & Thaut, 2000; McIntosh, Rice & Thaut, 1994; McIntosh et al., 1997; Morris, Iansek, & Matyas, 1994; Thaut, McIntosh, & Rice, 1997; Suteerawattananon, Morris, Etnyre, Jankovic, & Protas , 2004; Willems, Nieuwboer, Chavert, & Desloovere, 2006). However, few prototypes are available for daily use, and to our knowledge, none utilize a smartphone application allowing individualized sounds and cadence. Therefore, we analyzed the effects on gait of Listenmee®, an intelligent glasses system with a portable auditory device, and present its smartphone application, the Listenmee app®, offering over 100 different sounds and an adjustable metronome to individualize the cueing rate as well as its smartwatch with accelerometer to detect magnitude and direction of the proper acceleration, track calorie count, sleep patterns, steps count and daily distances. The present study included patients with idiopathic PD presented gait disturbances including freezing. Auditory rhythmic cues were delivered through Listenmee®. Performance was analyzed in a motion and gait analysis laboratory. The results revealed significant improvements in gait performance over three major dependent variables: walking speed in 38.1%, cadence in 28.1% and stride length in 44.5%. Our findings suggest that auditory cueing through Listenmee® may significantly enhance gait performance. Further studies are needed to elucidate the potential role and maximize the benefits of these portable devices.     

Self-unawareness of levodopa induced dyskinesias in patients with Parkinson’s disease

The study analyzes the presence of dyskinesias-reduced-self-awareness in forty-eight patients suffering from Parkinson’s disease (PD). As the association with executive dysfunction is a matter of debate and we hypothesize it plays an important role in dyskinesias self-unawareness, we analyzed the role of dopaminergic treatment on the medial-prefrontal-ventral-striatal circuitry using a neurocognitive approach. Special attention was given to metacognitive abilities related to action-monitoring that represent a novel explanation of the phenomenon.PD patients were assessed using different rating scales that we devised to measure movement awareness disorders. In order to ascertain whether each variable measured at a cognitive-clinical level contributes to predicting the scores of the movement-disorder-awareness-scales, we conducted multiple logistic regression models using the latter as binary dependent variables. We used the Wisconsin Card Sorting Test-metacognitive-version to assess the executive functions of the prefrontal-ventral-striatal circuitry.Data showed that a reduction of self-awareness using the Dyskinesia rating scale was associated with global monitoring (p = .04), monitoring resolution (p = .04) and control sensitivity (p = .04). Patients failed to perceive their performance, distinguish between correct and incorrect sorts, be confident in their choice and consequently decide to gamble during the task.We did not find any association with executive functions using the hypo-bradykinesia rating scale.Our findings indicate that when the comparator mechanism for monitoring attentive performance is compromised at a prefrontal striatal level, patients lose the ability to recognize their motor disturbances that do not achieve conscious awareness.     

Rethinking deindustrialisation and male career crisis

The decline in manufacturing and growth of service-based jobs has prompted many social theorists to argue that the ability of working-class men to construct meaningful and rewarding careers is becoming ever more limited. Despite using the universal label ‘working class’, the experience of skilled working-class men has been largely ignored. This article explores 26 work history interviews collected from 14 former Royal Dockyard tradesmen in South-East England and 12 of these men's sons and grandsons. Findings from this research challenge the idea that most men were/and are passive victims of industrial change. By contrast, the majority of men in this study managed to carefully adapt to and navigate the transition from industrial to post-industrial work whilst still retaining a ‘linear life narrative’ to give meaning to their evolving careers and lives.     

Motor planning in Parkinson’s disease patients experiencing freezing of gait: The influence of cognitive load when approaching obstacles

Freezing of gait (FOG) in Parkinson’s disease (PD) is typically assumed to be a pure motor deficit, although it is important to consider how an abrupt loss of gait automaticity might be associated with an overloaded central resource capacity. If resource capacity limits are a factor underlying FOG, then obstacle crossing may be particularly sensitive to dual task effects in eliciting FOG. Participants performed a dual task (auditory digit monitoring) in order to increase cognitive load during obstacle crossing. Forty-two non-demented participants (14 PD patients with FOG, 13 PD who do not freeze, and 14 age-matched healthy control participants) were required to walk and step over a horizontal obstacle set at 15% of the participants’ height. Kinematic data were split into two phases of their approach: early (farthest away from the obstacle), and late (just prior to the obstacle). Interestingly, step length variability and step time variability increased when PD patients with FOG performed the dual task, but only in the late phase prior to the obstacle (i.e. when closest to the obstacle). Additionally, immediately after crossing, freezers landed the lead foot abnormally close to the obstacle regardless of dual task condition, and also contacted the obstacle more frequently (planning errors). Strength of the dual task effect was associated with low general cognitive status, declined executive function, and inappropriate spatial planning, but only in the PD-FOG group. This study is the first to demonstrate that cognitive load differentially impacts planning of the final steps needed to avoid an obstacle in PD patients with freezing, but not non-freezers or healthy controls, suggesting specific neural networks associated with FOG behaviours.     

Anglicans and Islam in East Africa: The Diocese of Zanzibar and the Universities’ Mission to Central Africa (1923–63)

This article examines the legacy of Godfrey Dale, who in 1923 published a Qur'an in Swahili, with the intention of letting people “know what the Qur?ān does say.” The work of his successors is explored. It discusses the proposals for work amongst Muslims submitted by lay and ordained members of the Diocese of Zanzibar for consideration at the 1944 Diocesan Conference, as the Diocese prepared for the situation after World War II. Finally, it examines the role of the Diocese with particular reference to Christian–Muslim relations as Tanganyika and Zanzibar prepared for Independence.