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Hand preference and hand skill was assessed in two broad age groups of children with autism, children with learning disabilities, and control schoolchildren. The first group comprised children ages 3-5 years and the second group of children ages 11-13 years. Degree of handedness remained relatively stable across age groups, particularly within the autistic(More)
Left-handedness occurs in about 8% of the human population. It runs in families and an adoption study suggests a genetic rather than an environmental origin; however, monozygotic twins show substantial discordance. The only genetic models that successfully explain the family and twin data are those of McManus and Annett, which share the feature of(More)
There have been few studies of why some people are frequently involved in aesthetic activities such as going to the theatre, reading or playing musical instruments, whereas others are less involved. This study assesses the broad roles of education, personality and demographic factors such as social class, age and sex. More aesthetic activity was associated(More)
After reviewing the literature on experimental rectangle aesthetics ('the golden section') it was concluded that all of the effects demonstrated in the literature were dubious, either due to methodological limitations or inadvertent experimenter bias, these defects being compounded by most studies only considering population preferences and ignoring(More)
  • I C McManus
  • 1985
A simple two-allele Mendelian model of the genetics of handedness is described and fitted to data in the literature. The model proposes that there are two alleles, D (dextral) and C (chance), the homozygous DD genotype producing only right-handers (directional asymmetry), the homozygous CC genotype producing a racemic mixture of 50% right-handers and 50%(More)
Hand preference and hand skill were assessed in 20 children with autism, 20 normal controls and 12 children with mental retardation. 90% of the normal controls and 92% of the children with mental retardation showed concordance for hand preference and hand skill (i.e. the preferred hand was also the more skillful), whereas only 50% of the children with(More)
BACKGROUND The Study Process Questionnaire (SPQ) is a widely used measure of learning approach and was proposed to have three orientations: surface, deep, and achieving, each with an underlying motive and strategy. AIMS This study aimed to examine the factor structure and longitudinal stability over five to seven years of a modified shortened 18-item(More)
of cleavage, in which Ago3 sense piRNAs direct cleavage of antisense transcripts producing the 5´monophosphate end of Aub and Piwi antisense piRNAs. A 3´-to-5éxonuclease could then trim the 3énd of piRNA transcripts, perhaps acting together with the Hen1 methyltransferase, which might terminate the trimming process by adding a 2´-O-methyl group to the(More)