Measurement of Deliberate Self-Harm: Preliminary Data on the Deliberate Self-Harm Inventory

Deliberate self-harm has recently begun to receive more systematic attention from clinical researchers. However, there remains a general lack of consensus as to how to define and measure this important clinical construct. There is still no standardized, empirically validated measure of deliberate self-harm, making it more difficult for research in this area to advance. The present paper provides an integrative, conceptual definition of deliberate self-harm as well as preliminary psychometric data on a newly developed measure of self-harm, the Deliberate Self-Harm Inventory (DSHI). One hundred and fifty participants from undergraduate psychology courses completed research packets consisting of the DSHI and other measures, and 93 of these participants completed the DSHI again after an interval of 2–4 weeks (M = 3.3 weeks). Preliminary findings indicate that the DSHI has high internal consistency; adequate construct, convergent, and discriminant validity; and adequate test-retest reliability.     

Continuous and Discontinuous Drawing: High Temporal Variability Exists Only in Discontinuous Circling in Young Children

The authors studied whether the drawing variability in young children is best explicable by (a) demands on the explicit timing system, (b) an underdeveloped ability to control limb dynamics, or (c) both. The explicit timing demands were lower in continuous drawing in comparison with the discontinuous task. The authors manipulated limb dynamics by changing the number of joints involved, with line drawing requiring fewer joints than circle drawing. Results showed that young children had high temporal variability in discontinuous circling but not in other conditions. The authors argue that both explicit timing and dynamic complexity of limb control may be determinants of temporal consistency and may thus play an important role in the development of drawing and writing skills in children.     

Highs and Lows in Motor Control Development

Abstract

Motor control is classically described as relying on two components: anticipatory control (feedforward processing) and online control (feedback processing). Here we aimed to unveil the developmental steps of both feedback and feedforward control in 5–10 years old children, using a simple and ecological task. We manipulated object’s weight in a reach-to-displace paradigm. When the weight was known before lifting it, anticipatory processes were quantifiable during the reaching phase. Conversely, an unknown weight triggered online corrections during the displacing phase. Movement kinematics revealed that children anticipate this objet property as young as 5 y-o. This anticipation becomes adequate around 7 y-o and is paralleled by poor online corrections. This simple yet relevant paradigm should allow quantifying deviations from neurotypical patterns in disorders of motor control.     

Gross Motor Performance in Minimally Brain Injured Children

As a pre-requisite to curriculum development, the characteristics of the gross motor performance of special education classes of minimally brain injured boys and girls were described. In general, age changes in mean performance were linear, the scores of the boys being the superior. The level of performance very closely resembled that of comparison groups of educable mentally retarded children from the same school districts.     

价值观对蓄意创伤受害者创伤后应激障碍症状的影响

探讨价值观对蓄意创伤受害者创伤后应激障碍（Posttraumatic Stress Disorder ,简称PTSD）症状的影响方式。方法：采用事件冲击量表、受害人认可评价量表、施瓦兹价值观量表作为测查工具,测查了163 名蓄意创伤受害者。结果：（1）蓄意创伤受害者的PTSD三大症状表现有显著差异,闯入症状水平最高,回避症状水平次之,高警觉症状水平最低。（2）蓄意创伤受害者所持的价值观和对外界接纳的评价能较好地预测PTSD三大症状。（3）内敛价值类型通过诸如社会接纳等反映外在标准的因素影响PTSD的闯入症状。结论：蓄意创伤受害者PTSD症状表现有其自身的特点,对外界接纳的评价和自身所持的价值观对其PTSD症状有直接或间接的影响     

Motor Performance of Stutterers and Nonstutterers on Timing and Force Control Tasks

Recently it has been suggested that speech and manual timing tasks share a common central process (Franz, Zelaznik, & Smith, 1992). Because stuttering is thought to be related to deficits in motoric processes such as timing, stutterers (n = 15) were compared with a set of age-, education-, and sex-matched nonstutterers on timing and isometric force-production tasks. In the timing tasks, subjects flexed and extended the right index finger at the metacarpophalangeal joint at cycle durations of 600, 500, 400, 300, and 200 ms. In the force-production tasks, subjects generated isometric forces to match target force levels displayed on a cathode-ray tube (CRT) screen. There were five levels of force, ranging from .11 to 7.85 newtons. Overall, there were no differences in timing and force-production performance between stutterers and nonstutterers. These results are similar to those obtained recently by Hulstijn, Summers, van Lieshout, and Peters (1992). We suggest that stuttering is not characterized by a general deficit in rhythmic timing. Instead, the motor deficit associated with stuttering should be viewed as speech specific.     

刻意训练在AOC电子竞技运动专长获得中的作用

以AOC电子竞技运动为研究领域,通过考察97名顶级高手对16种领域相关活动的评价以探索该领域的刻意训练活动,并进一步分析3种水平共271名被试进行刻意训练活动对其竞技水平的影响作用。结果发现,在AOC电子竞技运动领域存在3种刻意训练活动;不同水平被试进行刻意训练活动的时间量存在差异;刻意训练活动的时间量可有效预测竞技水平,而经验年份对竞技水平无预测作用;刻意训练活动的娱乐性因领域而异,且在不同水平被试间存在差异。     

亲子依恋、自我概念与大学生自我伤害的关系

以广州市四所高校562名大学生为被试,检验了亲子依恋、自我概念与自我伤害之间关系的三种模型,以讨论其内部关系。结果表明：1）父子依恋和自我概念、母子依恋和自我概念均对自我伤害行为具有保护作用,支持了累加效应模型;2）父子依恋和母子依恋均通过自我概念的部分中介作用对自我伤害产生间接影响,支持了中介效应模型;3）父子依恋和母子依恋对自我伤害的保护作用在低自我概念组中明显,支持了保护因子-保护因子排除假说。     

皮层运动区和皮层下运动区在运动的认知控制中的作用

运动的认知控制是机体选择适合当前情境的运动的关键。皮层和皮层下运动区的不同脑区分别参与运动认知控制的不同方面, 同时又相互协作以确保各种运动的正确执行。运动前区(PMC)和初级运动区(M1)共同负责感觉与运动之间的转换, M1区、小脑和纹状体共同参与运动的学习和记忆, 辅助运动复合体(SMC)和M1区在运动的计划过程中发挥主导作用。基底神经节和前辅助运动区(pre-SMA)是对运动进行抑制的关键脑区。     

The Effect of Practice on Human Performance in a Preview-Constrained Motor Control Task

This study examined the effect of short-term practice on the parameters of a linear model involving mean arm movement time as a function of Fitts’s index of difficulty (ID) variable and a preview-constraint ID variable. Significant (at the 2% level) interactions were found to exist between practice and the two ID variables indicating that the model parameters associated with these variables are both linear functions of practice time.     

社会支持、主动反刍与创伤后成长的关系:基于汶川地震后青少年的追踪研究

本文以追踪研究的方式,在汶川地震后3.5年、4.5年和5.5年三个时间点,采用社会支持问卷、反刍问卷和创伤后成长问卷对汶川地震后245名中学生进行调查。通过建立交叉滞后模型,考察社会支持、主动反刍与创伤后成长的相互作用关系。结果发现,震后3.5年至5.5年间,社会支持对主动反刍和PTG的跨时间点预测作用不显著;主动反刍对PTG具有显著的跨时间点正向预测作用,但对社会支持的跨时间点预测作用不显著;震后3.5年的PTG对震后4.5年的主动反刍具有显著的跨时间点正向预测作用,但震后4.5年的PTG对震后5.5年的主动反刍的跨时间点预测作用不显著;震后3.5年和4.5年的PTG分别对震后4.5年和5.5年的社会支持的跨时间预测作用均不显著。     

主动反刍、创伤后应激障碍与创伤后成长的关系:一项来自汶川地震后青少年的长程追踪研究

本文以追踪研究的方式, 在汶川地震后3.5年、4.5年和5.5年三个时间点, 采用反刍问卷、创伤后应激障碍问卷和创伤后成长问卷对汶川地震后245名中学生进行调查。通过建立交叉滞后模型, 考察主动反刍、创伤后应激障碍与创伤后成长的相互作用关系。结果发现, 震后3.5~5.5年间, 创伤后应激障碍对主动反刍具有跨时间点的正向预测作用, 主动反刍对创伤后应激障碍跨时间点的预测作用不显著;主动反刍与创伤后成长之间存在跨时间点的相互正向预测关系;创伤后应激障碍与创伤后成长之间跨时间点的直接预测作用不显著, 但震后3.5年的创伤后应激障碍可以通过震后4.5年的主动反刍间接地正向预测震后5.5年的创伤后成长;创伤后应激障碍与创伤后成长的横断关系随着时间历程的变化而逐渐减弱。     

The Effects of Objectives and Constraints on Motor Control Strategy in Reciprocal Aiming Movements

The goal of this study was to examine how the kinematics of reciprocal aiming movements were affected by both the objective of the movement and the constraints operating on that movement. In Experiment 1, the objective of the movement was indirectly manipulated by capitalizing on the fact that subjects determine their own accuracy and speed limits, despite uniform task instructions to move as quickly and accurately as possible. A Fitts' type reciprocal aiming paradigm was employed, in which 69 subjects were asked to move a stylus repetitively between two spatially separated targets. Four target widths were orthogonally combined with four movement amplitudes, resulting in 16 conditions. Movements were made on an X-Y digitizing tablet. Based on the mean variable error produced on both targets, subjects were differentiated post hoc into three movement objective groups: speed, accuracy, and speed-plus-accuracy. Kinematic analyses revealed that the programming and execution of movements were systematically influenced by both the movement objective and the movement constraints. That is, movement time, peak velocity, dwell time, acceleration and deceleration time, normalized acceleration and normalized deceleration varied systematically as a function of both the speed-accuracy movement objective and the movement constraints of target size and movement distance. Moreover, the consequences of changing the constraints of the movement were affected by an interaction with the objective of the movement. In Experiment 2, the objective of the movement was directly manipulated by varying speed and/or accuracy instructions to subjects. The basic results of Experiment 1 were substantiated. Overall, the results were consistent with the view that motor control is dependent upon sensory consequences.     

Ipsilesional Arm Motor Sequence Performance After Right and Left Hemisphere Damage

Aiming movements are part of daily activities but the brain hemispheres’ role in targeted aiming sequential movements is not fully clear. Start and execution of discrete and sequential tasks toward targets were analyzed in 10 individuals with left-hemisphere damage, 10 right-hemisphere–damaged, and 10 healthy ones. Arm movements were performed over a digitizing tablet, following stimuli on a monitor, from initial position toward right and left-positioned targets. Poststroke individuals used their ipsilesional arm and healthy individuals, both arms. Right-hemisphere–damaged individuals showed higher reaction time and left-hemisphere–damaged individuals, lower smoothness. Due to spatial demand of tasks, the right hemisphere played a major role in movement planning, while the left, in movement execution.     

Timing and the Control of Rhythmic Upper-Limb Movements

Accurate timing of limb displacement is crucial for effective motor control. The authors examined the effects of movement velocity, duration, direction, added mass, and auditory cueing on timing, spatial, and trajectory variability of single- and multijoint rhythmic movements. During single-joint movements, increased velocity decreased timing and spatial variability, whereas increased movement duration increased timing variability but decreased spatial variability. For multijoint movements, regardless of condition, increasing velocity decreased joint timing, spatial, and trajectory variability, but all hand variabilities were unaffected by velocity, duration, load, or direction. Timing, spatial, and trajectory variability was greater at the shoulder compared with the elbow and minimal at the hand, supporting the notion that reaching movements are planned in hand space as opposed to joint space.     

品管圈对卒中偏瘫患者肢体功能锻炼的效果观察

探讨品管圈活动在卒中偏瘫患者肢体功能锻炼中的应用效果。将66例患者随机分为对照组（常规锻炼组）和试验组（品管圈组）,分别行不同模式的功能锻炼。采用康复护理日常生活活动（RNADL）量表分别对其日常生活活动能力（ADL）进行评定。试验组自理能力高于对照组,差异有统计学意义（P〈0．01）,且其依从性与对照组比较,差异有统计学意义（P〈O．05）。品管圈有助于提高卒中偏瘫患者功能锻炼的依从性。     

Capturing the Naturally Occurring Superior Performance of Experts in the Laboratory: Toward a Science of Expert and Exceptional Performance

ABSTRACT— Expertise researchers have traditionally shied away from studying the highest levels of achievement in favor of studying basic cognitive processes, such as memory and categorization. In this article, we present a different approach that is focused on capturing superior (expert) performance on representative tasks that reveal the essential characteristics of expertise in a given domain. In domains where expert performance is measurable, acquisition is gradual and the highest levels are only attained after 10 years of intense preparation—even for the most "talented." Analyses of reproducibly superior performance show that it is mediated by physiological adaptations and cognitive skills acquired as a result of the cumulative effects of special practice activities (deliberate practice). It appears that the genes necessary to attain such adaptations and expert skills can be activated in healthy children—the only clear exceptions to date being genes that control body size and height. Our knowledge of how experts acquire their superior skills provides insights into the potential for human adaptation and skill acquisition and has important implications for theories of the structure of general and expert cognition, as well as for training interventions in applied psychology and education.     

Changes in Saccadic and Manual Motor Control After Ocular Smooth Pursuit Adaptive Modifications

The gain of ocular smooth pursuit responses can be adaptively modified under certain circumstances. Evidence that these modifications are caused, at least partly, by changes at a sensory level comes from the fact that subsequent manual tracking movements generated during visual fixation are also modified in a similar manner. The question addressed in the present experiment was whether the modifications are constrained specifically to responses such as these, which are driven by retinal image motion, or whether they can also influence movements that make use of retinal image position. This was accomplished by comparing manual and oculomotor responses to step changes in target position before and after smooth pursuit adaptation. The results showed that, as with manual tracking movements, these responses were also modified by the adaptive procedure, although to a lesser extent. In particular, following a 20-min period in which subjects (N = 4) were submitted to a procedure designed to increase the gain of the smooth pursuit system, manual step tracking movements and ocular saccades displayed larger amplitudes than those shown prior to the adaptation. In addition, these gain changes were accompanied by appropriate alterations in response kinematics. Taken together, these results suggest that the mechanisms responsible for adaptive modifications in the smooth pursuit system are also able to more generally influence the processing of visuospatial information. The possible neurophysiological substrate underlying these mechanisms is discussed.     

Motor Performance and Response Consistency as a Function of Age

The specificity versus generality of motor performance and motor response consistency was investigated as a function of age. 120 Ss, 30 each at age 7, 11, 15, and 19 yr., were given 120 practice trials (60 trials per session with 24 hr interpolated between sessions) on both simple and choice RT tasks. For motor performance the reliability of individual differences was high in both tasks at all ages, while the amount of generality was moderately high in the two younger groups but diminished with age. The reliability coefficients for motor response consistency were low for both tasks but, with two exceptions, statistically significant. There was no evidence for generality in motor response consistency at any age.