Lateralization in gifted children

Abstract

Performance on measures of perceptual and lateral asymmetry of 28 intellectually gifted children (ages 10-12) were compared with performances of 28 controls of average intelligence. As a group, the gifted subjects did not differ significantly from controls in type or degree of lateralization, although the control males demonstrated a stronger right-side preference on the Dean Lateral Preference Schedule (DLPS). A Group X Sex interaction was found in a combined analysis of DLPS and Dichotic Listening (DL), and with DL alone, suggesting that gifted males and females demonstrate lateral asymmetries that differ from their same-sex control counterparts. Implications of these findings are discussed.Within the last decade a considerable amount of research has been conducted on the hemispheric asymmetries demonstrated by children. The most consistent findings suggest that typical right-handed children manifest right ear and right visual field advantages for processing verbal stimuli (Bryden, 1982). There is some evidence to suggest that atypical lateralization is prevalent in various handicapped populations. For example, Netley (1976) found atypical lateralization in subjects with agenesis of the corpus callosum and in females with Turner syndrome. Neufeldt (1966), Rengstorff (1968), Hartley (1981), Kershner (1972, and others have found decreased lateralization in the mentally retarded population as measured by a host of laterality indices. Rhodes, Dustman, and Beck (1969) found that bright children demonstrated hemispheric asymmetries on a visual evoked potential experiment whereas dull children produced little difference in amplitude between left and right hemiRequests for reprints should be sent to Lawrence Lewandowski,

Is crossed laterality associated with academic achievement and intelligence? A systematic review and meta-analysis

“…Studies that only measured mixed laterality or that conflated mixed and crossed laterality in their analyses were not included in this review. For instance, studies that considered laterality as a continuous variable, from totally right to totally left, were not included [ 10 , 25 , 50 – 55 ]. Similarly, studies where mixed and crossed laterality were merged were also excluded [ 9 , 49 , 56 – 60 ].…”

Is crossed laterality associated with academic achievement and intelligence? A systematic review and meta-analysis

“…Studies that only measured mixed laterality or that conflated mixed and crossed laterality in their analyses were not included in this review. For instance, studies that considered laterality as a continuous variable, from totally right to totally left, were not included [10,25,[50][51][52][53][54][55]. Similarly, studies where mixed and crossed laterality were merged were also excluded [9,49,[56][57][58][59][60].…”

Static stiffness of the precision hydrostatic grinding spindle

“…• parametry geometryczne łożyska: średnica, długość, szczeliny wypływowe, liczba komór, szerokość progów w komorach, • parametry hydrauliczne układu zasilania: ciśnienie zasilania, wymiary dławików, lepkość oleju, • prędkość obrotowa czopa [4].…”

“…Dla rozpatrywanego układu otrzymano λM = 5,85·10 -9 m/N. Na podstawie (3) zależności na sztywność promieniową łożysk w przyjętych płaszczyznach Oxz i Oyz przyjmują postać [4]:…”