Hand preference
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A large-scale population study of early life factors influencing left-handedness Open
Hand preference is a conspicuous variation in human behaviour, with a worldwide proportion of around 90% of people preferring to use the right hand for many tasks, and 10% the left hand. We used the large cohort of the UK biobank (~500,000…
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The Preference for Pointing With the Hand Is Not Universal Open
Pointing is a cornerstone of human communication, but does it take the same form in all cultures? Manual pointing with the index finger appears to be used universally, and it is often assumed to be universally preferred over other forms. N…
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Infant Hand Preference and the Development of Cognitive Abilities Open
Hand preference develops in the first two postnatal years with nearly half of infants exhibiting a consistent early preference for acquiring objects. Others exhibit a more variable developmental trajectory but by the end of their second po…
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What Are the Contributions of Handedness, Sighting Dominance, Hand Used to Bisect, and Visuospatial Line Processing to the Behavioral Line Bisection Bias? Open
In a sample of 60 French participants, we examined whether the variability in the behavioral deviation measured during the classical "paper and pencil" line bisection task was explained by individual laterality factors such as handedness a…
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Human handedness: A meta-analysis Open
Across time and place, right hand preference has been the norm, but what is the precise prevalence of left- and right-handedness? Frequency of left-handedness has shaped and underpinned different fields of research, from cognitive neurosci…
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Traumatic Finger Amputation Treatment Preference among Hand Surgeons in the United States and Japan Open
Background: Large geographic differences in procedure utilization draw into question its appropriate use. In Japan, replantation is frequent for even very distal finger amputations. In the United States, revision amputation is far more com…
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The development of neuromotor skills and hand preference during infancy Open
Assessing infant handedness has been controversial. Different assessment techniques and theoretical approaches produce different results. Evidence from a dynamic systems perspective showed that the development of postural control during in…
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Infants prefer a trustworthy person: An early sign of social cognition in infants Open
Recently, various studies have clarified that humans can immediately make social evaluations from facial appearance and that such judgment have an important role in several social contexts. However, the origins and early development of thi…
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Laterality in Children: Evidence for Task-Dependent Lateralization of Motor Functions Open
The behavioral preference for the use of one side of the body starts from pre-natal life and prompt humans to develop motor asymmetries. The type of motor task completed influences those functional asymmetries. However, there is no real co…
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Preschool language ability is predicted by toddler hand preference trajectories. Open
Prior work has found links between consistency in toddler handedness for the fine motor skill role-differentiated bimanual manipulation (RDBM), and language development at 2 and 3 years of age. The current study investigated whether consis…
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Leisure participation–preference congruence of children with cerebral palsy: a Children's Assessment of Participation and Enjoyment International Network descriptive study Open
Aim To examine participation–preference congruence, regional differences in participation–preference congruence, and predictors of whether children with cerebral palsy participate in preferred activities. Method The sample ( n =236) includ…
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Limb Preference in Animals: New Insights into the Evolution of Manual Laterality in Hominids Open
Until the 1990s, the notion of brain lateralization—the division of labor between the two hemispheres—and its more visible behavioral manifestation, handedness, remained fiercely defined as a human specific trait. Since then, many studies …
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Recent Advances in Handedness Genetics Open
Around the world, about 10% people prefer using their left-hand. What leads to this fixed proportion across populations and what determines left versus right preference at an individual level is far from being established. Genetic studies …
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Keep a Left Profile, Baby! The Left-Cradling Bias Is Associated with a Preference for Left-Facing Profiles of Human Babies Open
The left-cradling bias (LCB) refers to the (typically female) preference to hold an infant on the left side of one’s own body. Among the three main accounts proposed for such a phenomenon, namely the “handedness”, “heartbeat” and “hemisphe…
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Elevated levels of mixed-hand preference in dyslexia: Meta-analyses of 68 studies Open
Since almost a hundred years, psychologists have investigated the link between hand preference and dyslexia. We present a meta-analysis to determine whether there is indeed an increase in atypical hand preference in dyslexia. We included s…
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The home handedness questionnaire: pilot data from preschoolers Open
While handedness questionnaires are widely used in adults, there is no comparable measure designed specifically for children. The current study developed the Home Handedness Questionnaire (HHQ), a new measure for preschoolers administered …
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Neural support of manual preference revealed by BOLD variations during right and left finger-tapping in a sample of 287 healthy adults balanced for handedness Open
We have identified the brain areas involved in Manual Preference (MP) in 143 left-handers (LH) and 144 right-handers (RH). First, we selected the pairs of homotopic regions of interest (hROIs) of the AICHA atlas with significant contralate…
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The laterality of the gallop gait in Thoroughbred racehorses Open
Laterality can be observed as side biases in locomotory behaviour which, in the horse, manifest inter alia as forelimb preferences, most notably in the gallop. The current study investigated possible leading-leg preferences at the populati…
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Laterality related to the successive selection of Dutch national youth soccer players Open
In the general population, estimates of left-foot preference are around 20%. In soccer, specific tasks create positional demands, requiring 40% of the players to be left-footed. Whether and how this is related to the selection of players i…
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Hand preferences in coordinated bimanual tasks in non-human primates: A systematic review and meta-analysis Open
The evolutionary significance of hand preferences among non-human primates and humans has been studied for decades with the aim of determining the origins of the population-level tendency. In this study, a meta-analysis was conducted to st…
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Factor analysis of the Home Handedness Questionnaire: Unimanual and role differentiated bimanual manipulation as separate dimensions of handedness Open
Questionnaires are commonly used to measure handedness. However, popular measures do not capture hand preference by skill type, thus reducing handedness to a single dimension. An exception is the Home Handedness Questionnaire (HHQ), an act…
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The Left-handed Plastic Surgery Trainee: Perspectives and Recommendations Open
Background: Left-handed surgeons experience difficulty with tools designed for use in the right hand. The purpose of this study was to examine instrument laterality and to survey the experiences of left-handed plastic surgery trainees. Met…
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The Impact of Handedness, Sex, and Cognitive Abilities on Left–Right Discrimination: A Behavioral Study Open
The present study examined the relationship between left-right discrimination (LRD) performance and handedness, sex and cognitive abilities. In total, 31 men and 35 women - with a balanced ratio of left-and right-handers - completed the Be…
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Asymmetries in mother-infant behaviour in Barbary macaques ( <i>Macaca sylvanus</i> ) Open
Asymmetries in the maternal behaviour and anatomy might play an important role in the development of primate manual lateralization. In particular, early life asymmetries in mother’s and infant’s behaviour have been suggested to be associat…
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In support of 2D:4D: More data exploring its conflicting results on handedness, sexual orientation and sex differences Open
In the last few years, several studies have questioned the value of the second-to-fourth digit ratio (2D:4D) as a measure of exposure to sex hormones before birth. Controversy has also extended to the 2D:4D association with individual feat…
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2D: 4D, Lateralization and Strength in Handball Players Open
Lateralization, which is also known as hand preference, and 2D:4D finger ratio is a sign of prenatal testosterone and known to be associated with strength. The aim of this study is to investigate the relationship between 2D: 4D, lateraliza…
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The Relationship of Digit Ratio (2D:4D) With Cerebral Lateralization and Grip Strength in Elite Swimmers Open
The index finger and the 4th finger ratio (2D:4D) is the indicator of the prenatal testosterone. The aim of this study is to investigate the relationship between 2D:4D, hand preference and hand grip strength in swimmers. A total of 80 elit…
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Why Are Most Humans Right-Handed? The Modified Fighting Hypothesis Open
Humans show a population-level preference for using the right hand. The fighting hypothesis is an influential theory that suggests that left-handedness persists because its rarity provides a surprise advantage in fighting interactions, and…
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Research on the Relation between Hand Preference and Success in Karate and Taekwondo Sports with Regards to Gender Open
This study is conducted with the aim of determining whether there is a difference between hand preference and success of adult Karate and Taekwondo athletes with regards to their gender. 255 athletes in total (144 male and 111 female) who …
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Maternal cradling bias in baboons: The first environmental factor affecting early infant handedness development? Open
The most emblematic behavioral manifestation of human brain asymmetries is handedness. While the precise mechanisms behind the development of handedness are still widely debated, empirical evidences highlight that besides genetic factors, …