Motor variability in sports: A non-linear analysis of race walking

Abstract

This aim of this study was to analyse the nature of movement variability and to assess whether entropy measures may represent a valuable synthetic index of neuromuscular organization. The regularity of kinematic/kinetic time series during race walking, the changes in the structure of intra-individual variability over the test session, and the influence of athletic skill in (inter)national rank athletes were investigated. Motion analysis techniques were used. Sample entropy (SampEn) was adopted to examine fluctuations in lower limb angles and ground reaction forces. The regularity of both original and surrogate time series was assessed and compared, by estimating SampEn, to verify the presence of non-linear features in movement variability. SampEn was statistically lower in the original data than in surrogates. In contrast, the regularity of time series did not change significantly throughout the subsequent intra-individual repetitions. Hip and ankle joint angles and vertical ground reaction force manifested increased entropy for skilled athletes. Results suggest that race walking variability was not only the product of random noise but also contained information about the inherent propriety of the neuro-musculo-skeletal system. Furthermore, they provide some indications about neuromuscular control of the lower limb joints during race walking gait, and about the differences between more and less skilled individuals.     

What do we learn from docutainment? Processing hybrid television documentaries

This study examined how hybrid documentary formats, which embed educational contents into narratives, are cognitively processed. Based on existing research and theories, two reception modes were identified: processing with a focus on the narrative plotline and processing with a focus on the thematic structure. In two experiments, two markers of narrative processing could be found for hybrid television documentaries: the experience of transportation and the narrative distance effect. In the first experiment, it could be shown that re-enactments and personal variables enhance the experience of transportation. The second experiment confirmed the narrative distance effect, which occurs independently of reception goals. This means that educational facts which are closely tied to the narrative plotline were learned better than distant facts, regardless of whether the recipients watched the documentary for information or entertainment purposes. The study supplements prior theories on hybrid processing and provides conditions under which narratives are appropriate for learning.     

Teachers’ Concepts of Spatial Scale: An international comparison

Metric scale is an important concept taught as part of science curricula across different countries. This study explored metric and relative (body-length) scale concepts of inservice (N?=?92) and preservice (N?=?134) teachers from Austria, and Taiwan, and their concepts were compared with those of teachers from the USA. Participants completed three assessments: the Scale Anchoring Objects (SAO), Scale of Objects Questionnaire (SOQ), and a subsample of participants were interviewed with the Learning Scale Interview. A Rasch analysis was conducted with the SAO and SOQ and results showed that the Rasch model held for these assessments, indicating that there is an underlying common dimension to understanding scale. Further analyses showed that accuracy of knowledge of scale measured by the SAO and SOQ was not related to professional experience. There were significant differences in teachers’ accuracy of scale concepts by nationality. This was true for both metric and body-length SAO assessments. Post hoc comparisons showed that the Austrian and Taiwanese participants were significantly more accurate than the US sample on the SAO and SOQ. The Austrian participants scored significantly higher than the US and the Taiwanese participants. The results of the interviews showed that the Taiwanese experienced teacher participants were more likely to report learning size and scale through in-school experiences than the Austrian or the US participants. US teachers reported learning size and scale most often through participating in hobbies and sports, Taiwanese teachers reported learning scale through sports and reading, and Austrian teachers most often noted that they learned about scale through travel.     

The stepping stones of learning and evaluation

Based on the teachers’ lectures and evaluations we elaborate on a model of the aspects of learning. Inside the framework of this model three ways for solving a given problem relating to the previous teaching are presented.

We describe and analyse a method which is useful in selecting an evaluation task adapted to intended objectives, helps in the interpretation of the students’ performances and acts as a guide to the possible inferences about what the students acquire.     

Combining verbal and visual cueing: Fostering learning pictorial content by coordinating verbal explanations with different types of visual cueing

Instructional Science - Multimedia learning scenarios in which a picture is the main focus often use combinations of verbal and visual cueing. Based on models of picture processing and multimedia...     

Twelve- and Fourteen-Year-Old School Children Differentially Benefit from Sensorimotor- and Multisensory-Enriched Vocabulary Training

Educational Psychology Review - Both children and adults have been shown to benefit from the integration of multisensory and sensorimotor enrichment into pedagogy. For example, integrating pictures...     

Neural Correlates of High Performance in Foreign Language Vocabulary Learning

Learning vocabulary in a foreign language is a laborious task which people perform with varying levels of success. Here, we investigated the neural underpinning of high performance on this task. In a within-subjects paradigm, participants learned 92 vocabulary items under two multimodal conditions: one condition paired novel words with iconic gestures and the other with meaningless gestures. Memory performance was assessed through single-word translation tests. High performers consistently learned more items than low performers, regardless of the training condition, the time, and the difficulty of the task. Brain activity measured upon word recognition using functional magnetic resonance imaging was parametrically related to the behavioral data. High performance correlated with activity in the left angular gyrus (BA 39) and in the right extrastriate cortex (BA 19). These cortical areas mediate integration of information across different modalities as well as memory processes. Thus, high performance in vocabulary learning seems to depend on individual capacities to integrate and associate a word's semantics with sensorial stimuli. This may have important implications for education.     

e-Cognocracy and the design of public policies

Designing public policies using information technology as a communication support system is one of the most important current issues in the public policy making field. This work presents a methodology for the design and selection of public policies based on the cognitive democratic model known as e-Cognocracy. In addition to facilitating debate between representatives and the represented (deliberative democracy), this model allows for co-decision making between citizens and politicians. Furthermore, and of even greater importance, e-Cognocracy generates a process of continuing education that is concordant to the lifelong process of living systems (cognitive process). The methodology contemplates multiple rounds (usually two) when incorporating the preferences of the actors implicated in decision making and takes advantage of the creative capacity of human beings when solving complex problems. At the same time, the methodology permits the evaluation of both the individual and social learning that is derived from the scientific resolution of the problem and the democratisation of the knowledge that is extracted. This methodology was applied to a real-life experience in the Spanish municipality of Cadrete.     

Long‐Term Effects of Gestures on Memory for Foreign Language Words Trained in the Classroom

Language and gesture are viewed as highly interdependent systems. Besides supporting communication, gestures also have an impact on memory for verbal information compared to pure verbal encoding in native but also in foreign language learning. This article presents a within‐subject longitudinal study lasting 14 months that tested the use of gestures in the classroom, with the experimenter presenting the items to be acquired. Participants learned 36 words distributed across two training conditions: In the audio‐visual condition subjects read, heard, and spoke the words; in the gestural condition subjects additionally accompanied the words with symbolic gestures. Memory performance was assessed through cued native‐to‐foreign translation tests at five time points. The results show that gestures significantly enhance vocabulary learning in quantity and over time. The findings are discussed in terms of Klimesch's connectivity model (CM) of information processing. Thereafter, a code, a word, is better integrated into long‐term memory if it is deep, that is, if it is comprised of many interconnected components.