Abstract：
:Two recent studies in this journal (Wulf, Chiviacowsky, & Cardozo, 2014; Wulf, Chiviacowsky, & Drews, 2015) assessed the additive effects of autonomy support and enhanced expectancies (Wulf et al., 2014) and autonomy support and external focus (Wulf et al., 2015) on learning a novel throwing skill. Participants learned to throw with their non-dominant arm at a target consisting of nine concentric circles with a center bull's eye. More points were awarded for throws landing closer to the bull's eye, but the precise landing location within each circle was ignored. All throws landing anywhere within a specific circle received the same score. I comment on the inappropriateness of this assessment for determining performance variability, which is an important characteristic of skill learning. The standard errors reported by Wulf et al. (2014, 2015) are confusing or ambiguous to performance as measured in the task. They do not reflect the precision of performance that one might expect. This problem is not limited to the two studies in this commentary, but remains a continuing one in many studies of motor learning. Questions are also raised concerning the absence of any kinematic or kinetic measures of throwing performance in Wulf et al. (2014, 2015).
journal_name
Hum Mov Scijournal_title
Human movement scienceauthors
Fischman MGdoi
10.1016/j.humov.2015.05.011subject
Has Abstractpub_date
2015-08-01 00:00:00pages
225-31eissn
0167-9457issn
1872-7646pii
S0167-9457(15)00095-0journal_volume
42pub_type
评论,杂志文章abstract：:The modelling of the parallel bars-gymnast system is considered. A 2D frontal plane model for the parallel bars apparatus is developed, enabling technique and injury analysis to be undertaken when combined with an interacting gymnast body model. We also demonstrate how such a gymnast body model may be combined with th...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2005.11.008
更新日期：2006-04-01 00:00:00
abstract：:The aim of this work was to analyze the postural sway of volleyball players in bipedal quiet stance. The center of pressure (CoP) was measured in 46 athletes and 42 non-athlete controls. Each subject was tested in 10 different conditions, 5 with their eyes open and 5 with their eyes closed. Volleyball players showed g...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2013.01.002
更新日期：2013-06-01 00:00:00
abstract：PURPOSE:The understanding of fatigue of the human motor system is important in the fields of ergonomics, sport, rehabilitation and neurology. In order to understand the interactions between fatigue and reaction time, we evaluated the effects of two different fatiguing tasks on reaction time. METHODS:83 healthy subject...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2020.102679
更新日期：2020-10-01 00:00:00
abstract：:Transcranial magnetic stimulation is increasingly used as a tool to explore cortical motor function in healthy subjects and in patients with neurological disease or injury. This review describes a "twin coil" TMS approach that allows investigation of time related changes in functional connectivity between primary moto...
journal_title：Human movement science
pub_type： 杂志文章,评审
doi：10.1016/j.humov.2010.07.007
更新日期：2011-10-01 00:00:00
abstract：:Developmental coordination disorder (DCD) is a neurodevelopmental condition affecting motor coordination in children and adults. Here, EEG signals elicited by visual and tactile stimuli were recorded while adult participants with and without probable DCD (pDCD) performed a motor task. The task cued reaching movements ...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2019.02.018
更新日期：2019-04-10 00:00:00
abstract：PURPOSE:Developmental Coordination Disorder (DCD) has been shown to co-occur with behavioral and language problems in school-aged children, but little is known as to when these problems begin to emerge, or if they are inherent in children with DCD. The purpose of this study was to determine if deficits in language and ...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2015.06.005
更新日期：2015-08-01 00:00:00
abstract：:Sudden addition or removal of visual information can be particularly critical to balance control. The promptness of adaptation of stance control mechanisms is quantified by the latency at which body oscillation and postural muscle activity vary after a shift in visual condition. In the present study, volunteers stood ...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2010.06.002
更新日期：2011-04-01 00:00:00
abstract：:Current research has yet to determine how passive dynamics and active neural control contribute to upper limb swing during human locomotion. The present study aimed to investigate these contributions by restricting pelvis motion during walking, thereby altering the upward energy transfer from the swinging lower limbs....
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2017.09.009
更新日期：2018-02-01 00:00:00
abstract：:Passing behaviour is a key property of successful performance in team sports. Previous investigations however have mainly focused on notational measurements like total passing frequencies which provide little information about what actually constitutes successful passing behaviour. Consequently, this has hampered the ...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2017.07.010
更新日期：2017-10-01 00:00:00
abstract：:Anticipatory responses to inversion perturbations can prevent an accurate assessment of lateral ankle sprain mechanics when using injury simulations. Despite recent evidence of the anticipatory motor control strategies utilized during inversion perturbations, kinetic compensations during anticipated inversion perturba...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2019.03.015
更新日期：2019-03-22 00:00:00
abstract：:Load carriage can be harmful for workers, and alternative interventions to reduce back pain while walking and carrying loads are necessary. Unstable shoes have been used to improve balance and reduce back pain, but it is unknown whether walking wearing unstable shoes while carrying loads anteriorly causes excessive tr...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2017.10.010
更新日期：2017-12-01 00:00:00
abstract：:Although many studies have been focused on muscle synergies in the lower limbs, synergies of the thigh muscles during cycling have not been investigated in detail. We examined synergies of the thigh muscles including the vastus intermedius (VI) and adductor magnus (AM) while cycling. Eight healthy men pedaled at 20%, ...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2014.11.010
更新日期：2015-04-01 00:00:00
abstract：:To gain insight into the multiform dynamics and integration of remote yet pertinent subsystems into the performance of complex perceptual-motor skills, we recently conducted a series of longitudinal and cross-sectional experiments on the acquisition of 3-ball cascade juggling in which we measured, next to the ball tra...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2004.08.009
更新日期：2004-10-01 00:00:00
abstract：:Automated movements adjusting postural control may be hampered during musculoskeletal pain leaving a risk of incomplete control of balance. This study investigated the effect of experimental muscle pain on anticipatory postural adjustments by reaction task movements. While standing, nine healthy males performed two re...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2013.01.009
更新日期：2013-12-01 00:00:00
abstract：:Healthy children (n=12, age 7years) and young adults (n=11, age 21years) were asked to perform a bimanual balance and reaching protocol in a seated posture. Subjects balanced a ball on a Frisbee on the non-dominant palm of the hand while reaching with the dominant hand to pick up a toy off the ground. During half of t...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2015.03.001
更新日期：2015-06-01 00:00:00
abstract：:Motion analyses of lower body mechanics offer new schemas to address injury prevention strategies among baseball pitchers, where the influence of stride length remains unknown. This study examined the temporal effect of stride length at constituent pitching events and phases. Nineteen competitive pitchers (15 collegia...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2015.03.005
更新日期：2015-06-01 00:00:00
abstract：:Human voluntary movement involves the integration of kinaesthetic information with efferent motor activity during the planning and execution stages of movement. While much is known of the inhibitory and excitatory effects resulting from activation of specific kinaesthetic sensory receptors, in the present study we emp...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/s0167-9457(02)00169-0
更新日期：2002-12-01 00:00:00
abstract：:Rhythmic limb movements have been shown to spontaneously coordinate with rhythmic environmental stimuli. Previous research has demonstrated how such entrainment depends on the difference between the movement periods of the limb and the stimulus, and on the degree to which the actor visually tracks the stimulus. Here w...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2011.08.002
更新日期：2012-06-01 00:00:00
abstract：:This paper involved a biomechanical analysis of lower limb joint coordination during hula hooping. A lower extremity inverse dynamics model that incorporated kinematic input and force platform data was developed to compute the angular velocities, moments about and powers produced at the lower extremity joints. The abd...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2008.02.018
更新日期：2008-08-01 00:00:00
abstract：:Previous studies have found that rates of attention deficit hyperactivity disorder (ADHD) and developmental coordination disorder (DCD) are very similar, both being approximately 7% in sample populations [Kadesjö, B., & Gillberg, C. (1999). Developmental coordination disorder in Swedish 7-year-old children. Journal of...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2005.10.006
更新日期：2006-02-01 00:00:00
abstract：:The praxis test is a less well-documented method to determine functional manifestations of childhood dyspraxia. For this study, children aged 6-8years were recruited as follows: 17 children with DCD, 18 at risk of DCD and 35 without obvious problems in motor coordination. The Movement Assessment Battery for Children (...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2016.04.001
更新日期：2016-08-01 00:00:00
abstract：:The present study examined the relationship between executive function (EF) and fine motor control in young and older healthy adults. Participants completed 3 measures of executive function; a spatial working memory (SWM) task, the Stockings of Cambridge task (planning), and the Intra-Dimensional Extra-Dimensional Set...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2016.11.001
更新日期：2017-01-01 00:00:00
abstract：:It was proposed that grasping is a relatively stereotyped movement pattern which can be subdivided into the components of manipulation, transport, and orientation of the hand. However, it is still a matter of debate whether these components are independent of each other. In three experiments we altered the start postu...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2009.03.001
更新日期：2009-08-01 00:00:00
abstract：:The aim of this study was to examine the immediate effects of barefoot (BF) running on lower limb kinematics and muscle activity in a group of habitually shod runners. Ten male runners with no prior BF or minimalist running experience performed 1-min bouts of treadmill running at 3 velocities in both shod and BF condi...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2015.04.008
更新日期：2015-08-01 00:00:00
abstract：:We investigated age-related differences in finger coordination during rotational hand actions. Two hypotheses based on earlier studies were tested: higher safety margins and lower synergy indices were expected in the elderly. Young and elderly subjects held a handle instrumented with five six-component force sensors a...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2011.07.005
更新日期：2012-06-01 00:00:00
abstract：INTRODUCTION:The present study investigated the effect of stretchable characteristics of elastic therapeutic tape and its elongation on surface electromyography (EMG) of knee extensor muscles during knee extension movements. METHODS:Nine healthy men performed knee extension movement with the application of normal elas...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2018.12.003
更新日期：2019-02-01 00:00:00
abstract：:This study examined at what age children can engage in the hand rotation task (as a measure of motor imagery); whether engagement changes across development and; the influence of age and motor skill on performance. Children were aged 5-12 years (N=101; 52 girls), with no IQ or motor skill impairment. Less than 40% of ...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2014.03.013
更新日期：2014-06-01 00:00:00
abstract：:Motion sickness is preceded by differences in the quantitative kinematics of body sway between individuals who (later) become sick and those who do not. In existing research, this effect has been demonstrated only in measures of body sway, relative to the earth. However, body sway can become coupled with imposed oscil...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2019.03.006
更新日期：2019-04-01 00:00:00
abstract：:During anti-phased locomotor tasks such as cycling or walking, hemiparetic phasing of muscle activity is characterized by inappropriate early onset of activity for some paretic muscles and prolonged activity in others. Pedaling with the paretic limb alone reduces inappropriate prolonged activity, suggesting a combined...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2011.03.001
更新日期：2011-12-01 00:00:00
abstract：:We compared varied model types and their potential differential effects on learning outcomes and consolidation processes when observational practice was interspersed with physical practice. Participants (N = 75) were randomly assigned to one of five groups: (1) unskilled model observation, (2) skilled model observatio...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2018.11.014
更新日期：2019-02-01 00:00:00
