Direcionar a atenção do aprendiz para diferentes fontes de informação pode afetar a aprendizagem de habilidades motoras. Estudos sugerem que o foco de atenção externo produz melhores efeitos sobre a aprendizagem motora que o foco interno. Este estudo investigou como os diferentes focos de atenção afetam a aprendizagem motora de crianças com autismo. Crianças com diagnóstico de transtorno do espectro do autismo de gravidade leve e moderada (idade média = 11,8 anos), pareadas por idade e massa corporal, foram distribuídas aleatoriamente em dois grupos experimentais para realizar uma tarefa de equilíbrio dinâmico sobre uma plataforma de estabilidade sob instruções de foco externo (N=12) ou interno (N=12). Cada participante realizou seis blocos de cinco tentativas de 20 segundos na fase de aquisição. O desempenho foi avaliado através de medidas de tempo em equilíbrio e número de oscilações da plataforma e a aprendizagem aferida por testes de transferência e retenção. Os resultados demonstraram que não houve diferenças estatisticamente significativas de desempenho entre os grupos de foco externo e interno na fase de aquisição e no teste de transferência (p > 0,05). O desempenho do grupo de foco interno foi marginalmente superior ao grupo de foco externo no teste de retenção (p = 0,087, η² = 0,12). Os resultados demonstraram ainda que os dois grupos aumentaram as respectivas medidas de tempo em equilíbrio, reduziram o número de oscilações e apresentaram menor variabilidade de desempenho ao longo dos blocos de tentativas da fase de aquisição e retiveram as melhorias de desempenho adquiridas no teste de retenção. Essas evidências indicaram que as crianças com autismo foram capazes de aprender a tarefa de equilíbrio dinâmico nas duas condições experimentais propostas e que não é possível afirmar que os efeitos benéficos da adoção do foco de atenção externo em relação ao foco interno na aprendizagem motora sejam generalizáveis para essa população / Directing the learner´s attention to different sources of information can affect the learning of motor skills. Studies suggest that the external focus of attention produces better effects on motor learning than internal focus. This study investigated how different foci of attention affect the motor learning of children with autism. Children diagnosed with autism spectrum disorder of mild to moderate severity (mean age = 11.8 years) matched for age and body mass were randomly assigned to two experimental groups to perform a dynamic equilibrium task on a stability platform under instructions of external (N = 12) or internal (N = 12) focus. Each participant performed six blocks of five 20-second attempts in the acquisition phase. The performance was evaluated through measures of time in equilibrium and number of oscillations of the platform and the learning measured by transfer and retention tests. The results showed that there were no statistically significant differences in performance between the external and internal focus groups in the acquisition phase and in the transfer test (p> 0.05). The performance of the internal focus group was marginally higher than the external focus group in the retention test (p = 0.087, η² = 0.12). The results also demonstrated that the two groups increased their respective time measures in equilibrium, reduced the number of oscillations and presented lower variability of performance throughout the blocks of the acquisition phase and retained the performance improvements obtained in the retention test. These evidences indicated that children with autism were able to learn the task of dynamic balance in the two experimental conditions proposed and that it is not possible to affirm that the beneficial effects of adopting the external attention focus in relation to the internal focus in motor learning are generalizable to population

Background: For children with developmental coordination disorder (DCD), the acquisition and performance of everyday visual-motor activities such as buttoning, shoe tying, cutting with scissors or writing, presents a major challenge. Regardless of the activity considered, children with DCD are typically slower and less accurate than their peers. Given the well-acknowledged difficulties of children with DCD, it is surprising to find very few research studies systematically exploring visual-motor skill acquisition and performance in children with DCD. Objective: The overall objective of this study was to systematically describe visual-motor skill acquisition and task performance in children with DCD. Methods: Twenty-four children (8 years 11 months to 12 years 11 months) were recruited for this study; 12 children with DCD, 12 children developing typically with regards to their motor skills. A computer-based aiming task completed with three different cursor controls of increasing levels of difficulty (mouse, joystick, novel controller) was designed for this study. Mixed-effect modelling and visual graph analyses were performed to describe the influence of motor ability and task difficulty on visual-motor skill acquisition and task performance. Results: Motor ability modulated the impact of task difficulty on visual-motor skill acquisition and task performance. Children with DCD were as fast and as accurate as their peers in their initial performance of the simple, well-learned task (mouse). However, they were slower and less accurate when performing the complex and novel visual-motor task. Over repeated trials, the visual-motor task performance of children with DCD improved on all tasks, even for the simple. With regard to the complex, novel task, once children with DCD understood the features of the task, their performance also improved and approached that of their peers. Conclusion: While children with DCD can generally be characterized as less accurate and slower than their peers, this characterization needs to be specified and qualified; it is probably best not applied to a well-learned task.

Background: For children with developmental coordination disorder (DCD), the acquisition and performance of everyday visual-motor activities such as buttoning, shoe tying, cutting with scissors or writing, presents a major challenge. Regardless of the activity considered, children with DCD are typically slower and less accurate than their peers. Given the well-acknowledged difficulties of children with DCD, it is surprising to find very few research studies systematically exploring visual-motor skill acquisition and performance in children with DCD. Objective: The overall objective of this study was to systematically describe visual-motor skill acquisition and task performance in children with DCD. Methods: Twenty-four children (8 years 11 months to 12 years 11 months) were recruited for this study; 12 children with DCD, 12 children developing typically with regards to their motor skills. A computer-based aiming task completed with three different cursor controls of increasing levels of difficulty (mouse, joystick, novel controller) was designed for this study. Mixed-effect modelling and visual graph analyses were performed to describe the influence of motor ability and task difficulty on visual-motor skill acquisition and task performance. Results: Motor ability modulated the impact of task difficulty on visual-motor skill acquisition and task performance. Children with DCD were as fast and as accurate as their peers in their initial performance of the simple, well-learned task (mouse). However, they were slower and less accurate when performing the complex and novel visual-motor task. Over repeated trials, the visual-motor task performance of children with DCD improved on all tasks, even for the simple. With regard to the complex, novel task, once children with DCD understood the features of the task, their performance also improved and approached that of their peers. Conclusion: While children with DCD can generally be characterized as less accurate and slower than their peers, this characterization needs to be specified and qualified; it is probably best not applied to a well-learned task.

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<p>Two studies were conducted to examine the effects of learner-adapted practice on the self-efficacy beliefs, acquisition and retention of a motor task. Through a discovery process all participants learned to perform several keypress patterns, with the goal of completing each sequence as fast and accurate as possible. The first experiment had learners practice the keypress sequences in one of two adaptive schedules, which utilized either a ‘WinSwitch’ or ‘WinRepeat’ task switching algorithm, or follow a pre-determined order of tasks (two yoked-control groups). The purpose of this experiment was to determine if adaptive schedules were effective because they were tailored to a learner’s performance characteristics or due to the nature of the contextual interference employed by the switching algorithm when the 'winning' criterion was satisfied. To examine the psychological factors involved in adaptive practice, the second experiment had all groups practice in a ‘WinSwitch Adaptive’ schedule and manipulated the social-comparative feedback that was provided (positive, negative or control). Together these studies revealed that the effectiveness of adaptive schedules may not necessarily be due to the fact that they are tailored to a learner's performance characteristics. They also suggest that learning is facilitated by a switching algorithm that involves some blocked practice towards the beginning and mostly random practice towards the end of acquisition (WinRepeat schedule). However, providing positive social-comparative feedback can override the negative effects of the opposite schedule (WinSwitch) and result in more effective learning and increases in self-efficacy beliefs. These findings are discussed in reference to contextual interference effects and the self-efficacy framework.</p> / Master of Science in Kinesiology