Physiological determinants of speciality of elite middle- and long-distance runners     

Rabadán M  Díaz V  Calderón FJ  Benito PJ  Peinado AB  Maffulli N 《Journal of sports sciences》2011,29(9):975-982

The aim of this study was to determine which physiological variables predict excellence in middle- and long-distance runners. Forty middle-distance runners (age 23 ± 4 years, body mass 67.2 ± 5.9 kg, stature 1.80 ± 0.05 m, VO(2max) 65.9 ± 4.5 ml · kg(-1) · min(-1)) and 32 long-distance runners (age 25 ± 4 years, body mass 59.8 ± 5.1 kg, stature 1.73 ± 0.06 m, VO(2max) 71.6 ± 5.0 ml · kg(-1) · min(-1)) competing at international standard performed an incremental running test to exhaustion. Expired gas analysis was performed breath-by-breath and maximum oxygen uptake (VO(2max)) and two ventilatory thresholds (VT(1) and VT(2)) were calculated. Long-distance runners presented a higher VO(2max) than middle-distance runners when expressed relative to body mass (P < 0.001, d = 1.18, 95% CI [0.68, 1.68]). At the intensities corresponding to VT(1) and VT(2), long-distance runners showed higher values for VO(2) expressed relative to body mass or %VO(2max), speed and oxygen cost of running (P < 0.05). When oxygen uptake was adjusted for body mass, differences between groups were consistent. Logistic binary regression analysis showed that VO(2max) (expressed as l · min(-1) and ml · kg(-1) · min(-1)), VO(2VT2) (expressed as ml · kg(-0.94) · min(-1)), and speed at VT(2) (v(VT2)) categorized long-distance runners. In addition, the multivariate model correctly classified 84.7% of the athletes. Thus, VO(2max), VO(2VT2), and v(VT2) discriminate between elite middle-distance and long-distance runners.  相似文献   

Learning from the experts: gaining insights into best practice during the acquisition of three novel motor skills     

Hedges NJ  Edwards C  Luttin S  Bowcock A 《Research quarterly for exercise and sport》2011,82(2):178-187

The amount and quality of practice predicts expertise, yet optimal conditions of practice have primarily been explored with novice learners. Ten expert musicians and ten novices practiced disc-throwing skills under self-regulated conditions. A third novice group practiced with the same schedule as the music experts (yoked). The groups did not differ in terms of the amount of contextual interference, only in terms of when in-practice interference was introduced. The music experts progressed from a more blocked to random schedule which was opposite to the novices. This resulted in more accurate performance in retention for the experts in comparison to both novice groups (self-scheduled and yoked). The music expert and yoked groups showed higher form scores than the novice self-scheduled group, which might be related to the greater frequency of augmented information for these groups. There was no evidence that non-task-domain experts choose a more random practice schedule than novices, but in accord with good practice principles, they gradually introduced high amounts of interference into their practice. This strategy was associated with less error in retention for the experts. Because the yoked group showed more error than the music experts, the advantage of this schedule was also performance dependent.  相似文献   

Phoneme awareness in language-delayed children: comparative studies and intervention     

Nicola Warrick  Hyla Rubin  Sheila Rowe-Walsh 《Annals of dyslexia》1993,43(1):153-173

Our initial study compared 15 normally- developing and 13 language- delayed four- and- five- year- olds on a range of phoneme awareness tasks differing in the degree of explicit linguistic analysis required. The language- delayed group performed more poorly than the normally- developing children, and there were significant group differences on several tasks. A significant interaction effect reflected the particular difficulty the language- delayed group had with the more explicit tasks. Follow- up testing suggests that group differences are maintained over time and that the language- delayed children perform more poorly than the normally- developing children on tests of decoding and spelling at the end of first grade. An intervention study, training phoneme awareness skills in language-delayed kindergarten children, was undertaken with a new group of subjects. Fourteen language- delayed children participated in 16 training sessions over eight weeks. Fourteen normal and 14 language- delayed children served as controls. Only the language- delayed training group made significant gains from pre- to posttraining measures. Following training, the language-delayed training group performed similarly to normal controls and significantly better than language- delayed controls whom they had matched before intervention. One year later, the language-delayed children who received training maintained their gains on phoneme analysis tasks and performed significantly better than the language-delayed controls on reading measures. Educational implications are discussed.  相似文献   

Brain Processes in Mothers and Nulliparous Women in Response to Cry in Different Situational Contexts: A Default Mode Network Study     

Paola Rigo  Gianluca Esposito  Marc H. Bornstein  Nicola De Pisapia  Corinna Manzardo  Paola Venuti 《Parenting, science and practice》2019,19(1-2):69-85

SYNOPSIS

Objective: In everyday life, parents must respond to and interact with children while in different situational contexts. How situational contexts influence parents’ responses has not been systematically studied. Here we investigated mothers’ versus nonmothers’ neural responses to infant vocalizations in different situations with different task demands. Design: Using fMRI in 21 women (10 mothers), we explored the effects of being distracted by self-oriented (self-referential decisions about personality adjectives) versus goal-oriented (syllabic counting of personality adjectives) tasks while listening to infant cry in comparison with other emotional sounds (infant laughing, adult crying) on the activity of two medial nodes of the Default Mode Network (DMN): the medial prefrontal cortex (MPFC) and posterior cingulate cortex (PCC). Results: In the self-oriented task while listening to infant cry, both mothers and nulliparas showed (weak) activation of the DMN; this response likely reflects a shift of attention from the task to the cry. In the goal-oriented task, mothers, not nulliparas, showed (weak) activation of the DMN; this result is compatible with interference of emotional sounds while attending to a goal-oriented task, an activity that deactivates the DMN. Conclusions: Mothers are prone to process infant cry and emotional sounds and are less distracted from doing so by situational contexts, demonstrating their greater sensitivity to emotional sounds such as cry. By contrast, situational context influenced brain responses to infant sounds in nulliparas.  相似文献   

Cooperative Learning with Gifted and High-achieving Students: A review and meta-analyses of 12 studies     

Heinz Neber  Monika Finsterwald  Nicola Urban 《High Ability Studies》2001,12(2):199-214

Should gifted and high-achieving students cooperate in homogeneous groups or do they learn better individually? Or should they learn together with less gifted peers in heterogeneous groups? Current empirical research is reviewed in this article and meta-analyses of available results in 12 published studies are performed. Results show that few methodologically sound studies can be found at present. In addition, researchers only considered a restricted spectrum of participants, focused on learning of relatively simple materials, measured only a restricted range of possible outcomes, and neglected processes and activities of the learners, which might determine outcomes of cooperative learning. Results therefore remain controversial even for fundamental issues like learning in homogeneous versus heterogeneous, mixed-ability groups. In spite of these limitations, analyses nevertheless show that cooperative learning offers strong potentials for further improving the quality of instruction with gifted and high-achieving students. Further empirical research is required to obtain more differentiated information on the various aspects of cooperative learning.  相似文献   

Self-Cognition and Parental Brain     

Paola Rigo  Gianluca Esposito  Marc H. Bornstein  Nicola De Pisapia  Paola Venuti 《Parenting, science and practice》2019,19(1-2):97-100

SYNOPSIS

A key feature of parenting is that it is observable starting from behaviors that are performed daily by adult caregivers during repeated interactions with the child. Functional magnetic resonance imaging (fMRI) research on parental brain should integrate settings that resemble ecologies of situations in which parents typically care for children. However, as our commentators point out, ecological settings in fMRI research are challenging and require a multiperspective approach that systematically considers psychological and behavioral complexities of “mommy brain” to better understand how contingent mental states of mothers articulate with specific multi-tasking situations.  相似文献   

Language counts when learning mathematics with interactive apps     

Laura A. Outhwaite  Anthea Gulliford  Nicola J. Pitchford 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(6):2326-2339

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Nonverbal Executive Function is Mediated by Language: A Study of Deaf and Hearing Children          下载免费PDF全文

Nicola Botting  Anna Jones  Chloe Marshall  Tanya Denmark  Joanna Atkinson  Gary Morgan 《Child development》2017,88(5):1689-1700

Studies have suggested that language and executive function (EF) are strongly associated. Indeed, the two are difficult to separate, and it is particularly difficult to determine whether one skill is more dependent on the other. Deafness provides a unique opportunity to disentangle these skills because in this case, language difficulties have a sensory not cognitive basis. In this study, deaf (n = 108) and hearing (n = 125) children (age 8 years) were assessed on language and a wide range of nonverbal EF tasks. Deaf children performed significantly less well on EF tasks, even controlling for nonverbal intelligence and speed of processing. Language mediated EF skill, but the reverse pattern was not evident. Findings suggest that language is key to EF performance rather than vice versa.  相似文献   

The predictive impact of domestic violence on three types of child maltreatment   总被引：7，自引：0，他引：7  

McGuigan WM  Pratt CC 《Child abuse & neglect》2001,25(7):869-883

OBJECTIVE: This exploratory study investigated the co-occurrence of domestic violence and three types of child maltreatment: physical child abuse, psychological child abuse, and child neglect. METHOD: A sample of 2544 at-risk mothers with first-born children participated in a home-visiting child abuse prevention program. A longitudinal design using multiple data collection methods investigated the effect of domestic violence during the first 6 months of child rearing on confirmed physical child abuse, psychological child abuse, and child neglect up to the child's first 5 years. RESULTS: Logistic regressions revealed significant relationships between domestic violence and physical child abuse, psychological child abuse, and child neglect. These effects were significant beyond the significant effects of known risks of maltreatment, as measured by the Kempe Family Stress Inventory (KFSI). Domestic violence occurred in 59 (38%) of the 155 cases of confirmed maltreatment. Domestic violence preceded child maltreatment in 46 (78%) of the 59 cases of co-occurrence, as indicated by independent home observations and child protective service records. CONCLUSIONS: The findings indicate that domestic violence during the first 6 months of child rearing is significantly related to all three types of child maltreatment up to the child's fifth year. Domestic violence and risks factors measured on the KFSI continue to contribute to all three types of maltreatment up to the child's fifth year. Prevention programs would be wise to provide services to at-risk families until the child is at least 5 years old. Addressing concurrent problems during treatment may enhance intervention.  相似文献   

Technology integration for young children during COVID-19: Towards future online teaching     

Xinyun Hu  Ming Ming Chiu  Wai Man Vivienne Leung  Nicola Yelland 《British journal of educational technology : journal of the Council for Educational Technology》2021,52(4):1513-1537

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