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Patterns of hand preference and unintentional injuries among Indian attempted hand switchers and hand non-switchers.
This study examines the patterns of hand preference and unintentional injuries of attempted hand switchers and hand non-switchers. Data were collected from 3698 participants in Kharagpur, India, on measures of hand preference, hand switching, and unintentional injuries. The direction of left- or rig...
Season of birth, Geschwind and Galaburda hypothesis, and handedness.
Geschwind and Galaburda (1985a, 1985b) suggested that the season of conception is a non-genetic random variable that may affect laterality and handedness, probably due to seasonal variations in the hormonal influences on the foetal brain. According to this suggestion it is logical to expect seasonal...
Manual exploration of consistency (soft vs hard) and handedness in infants from 4 to 6 months old.
In infants the developmental course of haptic perception is constrained by the development of attention to object properties and of the ability to execute various movements with the hands. The purpose of this study is to consider how infants, aged 4 to 6 months, become able to use th...
Time to turn the other cheek? The influence of left and right poses on perceptions of academic specialisation.
We reasoned that people may use cheek as a cue when determining a model's area of academic interest. Two hundred and nine participants (M=90, F=119) viewed pairs of left and right cheek poses, and made a forced-choice decision indicating which image depicted a Chemistry, Psychology or English studen...
Understanding the genetics of behavioural and psychiatric traits will only be achieved through a realistic assessment of their complexity.
Francks et al. (2007) performed a recent study in which the first putative genetic effect on human handedness was identified (the imprinted locus LRRTM1 on human chromosome 2). In this issue of Laterality, Tim Crow and colleagues present a critique of that study. The present paper presents a persona...
Dichotic listening asymmetry: sex differences and menstrual cycle effects.
The impact of menstrual cyclicity and sex differences on dichotic listening was studied in 25 women and 20 men (aged 20-25 years). Dichotic listening was administered using consonant-vowel (CV) stimuli and tested across three attention conditions. Women were tested at two points in the menstrual cyc...
Handedness, Hinduism and sculpture: searching for evidence of lateralisation.
We studied lateral bias depicted in ancient Indian sculptures dating between the 7th and 9th centuries ad. A total of 288 sculptures were selected from various excavation sites/museums and the frequencies were computed on 13 different criteria in order to see the preferential bias for hand depicted...
Book Review: Caught knapping.