ABSTRACT
Abstract Intermanual Transfer of Learning (IMTL) is the ability to learn a certain skill in an easier way with one hand after that skill has been learnt by the opposite hand(1). This research aimed to investigate IMTL in a Fine Manual Dexterity (FMD) task in subjects presenting different Hand Preference (HP). The sample comprised 882 right and left-handers, both genders, aged 6 to 95 years old. The Dutch Handedness Questionnaire(2) was used to assess HP and the Purdue Pegboard Test(3) evaluated FMD. Direction and intensity of HP, Direction of Transfer (DT), gender, age and nationality were analyzed. IMTL changed according to DT and age, tending to be asymmetric, holding high values in the direction of Non-Preferred Hand (NPH) to Preferred Hand (PH). Children had got a higher IMTL rather than youngsters, adults and old adults with significant differences in adults.(AU)
Subject(s)
Humans , Male , Female , Child , Adolescent , Adult , Middle Aged , Aged , Aged, 80 and over , Young Adult , Functional Laterality , Hand , Motor Activity , Motor Skills , Psychomotor PerformanceABSTRACT
Studies that investigate handedness are performed in order to relate hemispheric specialization and cognitive performance. The aim of study was compare the neuropsychological performance between right-handed and left-handed children with ages from five to six years who participated in the Brazilian study of standardization of the Developmental Neuropsychological Assessment. For analysis of socio-demographic characteristics, descriptive statistics were used. To compare the mean scores between the groups, normality was tested using Analysis of Variance (one-way Anova) and the Kruskal-Wallis test. When comparing right-handed and left-handed children with typical development, left-handed children presented poorer performance on the subtests involving Attention and Executive Functioning, Language, and Learning and Memory.
Pesquisas sobre preferência manual são realizadas com o intuito de relacionar a especialização hemisférica cerebral e o desempenho cognitivo. O objetivo deste estudo foi comparar o desempenho neuropsicológico entre crianças destras e canhotas de cinco e seis anos de idade, participantes da pesquisa de normatização brasileira da Developmental Neuropsychological Assessment. Para análise das características sociodemográficas utilizou-se estatística descritiva. Para comparação dos escores entre os grupos, foi testada a normalidade, feita a Análise de Variância (Anova one-way) e o teste Kruskal-Wallis. Ao comparar crianças destras e canhotas com desenvolvimento típico, as canhotas apresentaram pior desempenho em subtestes que envolvem Atenção e Funções Executivas, Linguagem e Aprendizado e Memória.
Subject(s)
Humans , Child, Preschool , Child , Functional Laterality , Learning , Memory , NeuropsychologyABSTRACT
Preferência manual em bebês de 5 meses de idade foi avaliada em tarefas de alcançar alvos estáticos posicionados na linha média, à direita e à esquerda com referência a coordenadas egocêntricas. A análise da frequência de uso das mãos indicou direção e magnitude de preferência manual diversificadas entre os bebês. Foi observado que os bebês realizaram predominantemente alcances ipsilaterais para alvos posicionados lateralmente. Para alcances na linha média a frequência de uso foi semelhante entre as mãos direita e esquerda. Os resultados sugerem que nessa fase do desenvolvimento a preferência manual para o alcançar é alterada pela posição dos objetos no espaço.
Manual preference of 5-month-old infants was evaluated in tasks of reaching static targets positioned on the midline, at the left and right, regarding egocentric coordinates. Frequency analysis of using the hands pointed out to diversified direction and magnitude of manual preference among infants. It was observed that they predominantly made ipsilateral reaches toward targets laterally positioned. Frequency of using the right and left hands was similar for targets located at the midline. The results suggest that in this stage of development manual preference is shifted by the spatial position of the objects.