Sex and Handedness in Development of Visuomotor Skills

Karapetsas, A.; Vlachos, Filippos

doi:10.2466/pms.1997.85.1.131

Cited by 33 publications

(20 citation statements)

References 22 publications

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“…Our results showed that performance on this visualspatial and graphic task was comparatively low in extremely lateralized persons, who may include symptomatic hemiparesis. The present study complements previous findings [5,6] concerning the left handers' disadvantage in ROCF copying: extreme left handers performed at a lower level in copying than inconsistent left-handers in the younger children's group. Some pathological cases among left-handers might be responsible for this group trend.…”

Section: Discussionsupporting

confidence: 79%

“…The Duncan test showed that the MH group differed significantly from all the other groups. As was previously demonstrated, left handers did not perform as well as right handers [5,6]. This was true for children in both age groups.…”

Section: Age Sex and Handedness Differences In Visual-spatial Skillsupporting

confidence: 53%

“…Large samples of nonright handers are rare because only 9-10% of the population of schoolchildren is left-handed, and there are even fewer nonlateralized children. In previous studies [5][6][7], using a special recruitment procedure in order to obtain a large group of left handers (each lefthanded child was matched by age and sex to a right-handed child), we have demonstrated differences between left and right handers on the Rey-Osterrieth Complex Figure (ROCF) test, a popular tool used to test visuospatial-constructional functions [8]. In the present study, we complete this observation by including non-lateralized children.…”

Section: Introductionmentioning

confidence: 99%

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Developmental Risk: Evidence from Large Nonright-Handed Samples

Vlachos

Vaitsis

Karapetsas

2013

Child Development Research

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The aim of the present study is twofold. First, we tested the view that individuals who do not develop a typically strong behavioral laterality are distributed differentially among the two genders across age. Second, we examined whether left handedness and mixed handedness are associated with an elevated risk of some developmental or cognitive deficits. A special recruitment procedure provided norms of the Rey-Osterrieth Complex Figure (ROCF) copy from large samples of left-handed ( = 420) and mixedhanded ( = 72) compared to right-handed ( = 420) schoolchildren and adults ( = 545). This graphic task was considered as reflective of the growth of visual-spatial skills and impairment at copying as a developmental risk. Subjects' hand preference was assessed by the Edinburgh Handedness Inventory. Data analysis indicated that (1) the trend towards consistent right handedness is sex related. Girls are clearly ahead of boys in this lateralization process, and boys are overrepresented in mixed-handed subjects. The greater prevalence of mixed-handed boys compared to girls decreases with age. (2) Performance on drawing the ROCF varies according to age and handedness groups. Mixed-handed subjects scored worse in all age groups. The results are discussed in relation to the hormonal-developmental, neuropathological, and learning theories of lateralization.

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Section: Discussionsupporting

confidence: 79%

Section: Age Sex and Handedness Differences In Visual-spatial Skillsupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

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Developmental Risk: Evidence from Large Nonright-Handed Samples

Vlachos

Vaitsis

Karapetsas

2013

Child Development Research

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“…First of all, the hypothesised developmental differences in drawing performance between left-and righthanded children possibly do not appear or are not particularly significant in the range of ages we have examined. Such differences have been reported in previous studies during copying (Karapetsas & Vlachos, 1997) or mnemonic reproduction of complex figures (Vlachos & Karapetsas, 1996). The examination of a wider spectrum of ages is probably needed, in order to find out if such differences really exist and in which developmental stages they actually appear.…”

Section: Discussionmentioning

confidence: 83%

Left‐ and right‐handed children's drawing performance: Is there any difference?

Vlachos¹,

Bonoti²

2004

Laterality: Asymmetries of Body, Brain and Cognition

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The aim of the present study was to investigate the effect of hand preference on children's drawing development. An equal number of left- and right-handed children (N = 182), aged 7 to 12 years were asked to complete four different drawing tasks. During the drawing process, directionality of horizontal, vertical, and circular strokes as well as sequencing was recorded. Each drawing was scored according to the developmental stage to which is corresponded. It was found that drawing performance improved with age, irrespectively of hand preference and sex. In other words, left- and right-handers' drawing performance across the four tasks was not found to differ significantly. The only consistent difference between the two groups involved was in the production of horizontal lines. The results are discussed in terms of implications for questions about the lack of differences in left- and right-handed children's drawing performance.

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“…were not equated on gender composition due to recruitment outcomes and the desire that group sizes be as high as possible, future studies in this area may wish to do this, due to evidence suggesting possible links between EF performance and gender in both typical (Anderson, Anderson, & Garth, 2001;Karapetsas & Vlachos, 1997) and atypical (e.g. Newcorn et al, 2001) populations.…”

Section: Limitations and Possible Future Directionsmentioning

confidence: 99%

Executive function in Williams and Down syndromes

Carney

Brown

Henry

2013

Research in Developmental Disabilities

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This is the unspecified version of the paper.This version of the publication may differ from the final published version. Few investigations into the executive function (EF) skills of these groups have examined the effect of verbal/visuospatial task type on performance. Analogous verbal and visuospatial measures were administered to these populations within four EF domains: executive-loaded working memory (ELWM), inhibition, fluency and set-shifting. Performance in both groups was compared to that of typically-developing (TD) children using regression techniques controlling for potentially influential cognitive/developmental factors. Individuals with WS showed the expected relative visuospatial difficulties, as indicated by poorer performance than TD individuals, on tests of ELWM and fluency. Individuals with DS displayed the expected relative verbal difficulty in the domain of set-shifting. In addition, each population showed pervasive deficits across modality in one domain; ELWM for individuals with DS, and inhibition for individuals with WS. Individuals with WS and DS showed EF difficulties in comparison to a TD group, but, their executive performance was affected by EF task type (verbal/visuospatial) and EF domain in different ways. While the findings indicated that EF in these populations is characterised by a range of specific strengths and weaknesses, it was also suggested that the relative verbal/visuospatial strengths associated with each population do not consistently manifest across EF domains. Lastly, syndrome specificity was indicated by the differences in groups' performance patterns. Permanent repository linkKeywords: Williams syndrome, Down syndrome, executive function. INTRODUCTION Cognitive profiles associated with Williams and Down syndromesThe genetic conditions Williams syndrome (WS) and Down syndrome (DS) are characterised by roughly opposing ability profiles. Individuals with WS display relative verbal strengths alongside impairments on visuospatial tasks (Bellugi, Korenberg, & Klima, 2001;Pani, Mervis, & Robinson, 1999), particularly those involving a constructive element (Hoffman, Landau, & Pagani, 2003). Saccadic abnormalities (Brown et al., 2003;van der Geest, et al., 2004), and problems with location encoding (Farran & Jarrold, 2005), as well as the perceptual grouping of elements (Farran, 2005), have all been suggested as contributory factors with regard to these spatial difficulties, while vulnerability of the dorsal stream -a brain region thought to mediate the processing of spatial location and movement (Milner & Goodale, 1995) -has been implicated at the neurological level (e.g. Atkinson et al., 2003;Galaburda & Bellugi, 2000 Alberti, & Vianello, 2010;Porter, Coltheart, & Langdon, 2007;Rhodes, Riby, Park, Fraser, & Campbell, 2010). However, studies have not generally acknowledged verbal/visuospatial task modality as a potential contributing influence. This is surprising when the ability profiles associated with each population are considered. Furthermore, EF performance has been...

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Sex and Handedness in Development of Visuomotor Skills

Cited by 33 publications

References 22 publications

Developmental Risk: Evidence from Large Nonright-Handed Samples

Developmental Risk: Evidence from Large Nonright-Handed Samples

Left‐ and right‐handed children's drawing performance: Is there any difference?

Executive function in Williams and Down syndromes

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