How should we test infant handedness?

Fagard, Jacqueline; Margules, Sylvie; Lopez, Claude; Granjon, Lionel; Huet, Viviane

doi:10.1080/1357650x.2016.1192186

Cited by 16 publications

(8 citation statements)

References 50 publications

(64 reference statements)

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“…In turn, it enables better discrimination of laterality both within and between participants and both within and between behavioural categories. The relevance of this formula is supported by a recent study of infant handedness [64]. Following Fagard et al [39], we used [−100 to −90; −89.9 to −30; −29.9 to +30; +30.1 to +89.9; +90 to +100] as ranges of LI scores to classify participants as strong left-lateralized, mixed left-lateralized, ambidextrous, mixed right-lateralized and strong right-lateralized, respectively.…”

Section: Statistical Analysesmentioning

confidence: 85%

Assessment and analysis of human laterality for manipulation and communication using the Rennes Laterality Questionnaire

Prieur¹,

Barbu²,

Blois‐Heulin³

2017

R. Soc. open sci.

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Despite significant scientific advances, the nature of the left-hemispheric systems involved in language (speech and gesture) and manual actions is still unclear. To date, investigations of human laterality focused mainly on non-communication functions. Although gestural laterality data have been published for infants and children, relatively little is known about laterality of human gestural communication. This study investigated human laterality in depth considering non-communication manipulation actions and various gesture types involving hands, feet, face and ears. We constructed an online laterality questionnaire including 60 items related to daily activities. We collected 317 594 item responses by 5904 randomly selected participants. The highest percentages of strong left-lateralized (6.76%) and strong right-lateralized participants (75.19%) were for manipulation actions. The highest percentages of mixed left-lateralized (12.30%) and ambidextrous (50.23%) participants were found for head-related gestures. The highest percentage of mixed right-lateralized participants (55.33%) was found for auditory gestures. Every behavioural category showed a significant population-level right-side bias. More precisely, participants were predominantly right-lateralized for non-communication manual actions, for visual iconic, visual symbolic, visual deictic (with and without speech), tactile and auditory manual gestures as well as for podial and head-related gestures. Our findings support previous studies reporting that humans have left-brain predominance for gestures and complex motor activities such as tool-use. Our study shows that the Rennes Laterality Questionnaire is a useful research instrument to assess and analyse human laterality for both manipulation and communication functions.

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Section: Statistical Analysesmentioning

confidence: 85%

Assessment and analysis of human laterality for manipulation and communication using the Rennes Laterality Questionnaire

Prieur¹,

Barbu²,

Blois‐Heulin³

2017

R. Soc. open sci.

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“…Consequently, trending right‐handers could be one reason why some studies fail to replicate effects or find negligible effects when assessing the relation between handedness and extra‐domain factors. Methodology, period in developmental time, and choice of manual behavior are not standard across the literature (Michel, 2021; Nelson & Gonzalez, 2020) and procedures can vary how children's handedness is classified (Campbell, Marcinowski, Latta, et al., 2015; Fagard et al., 2017). Depending on the age at which a preference is assessed, and criteria used, trending right‐handers could easily be lumped into stable preference groups, infants exhibiting no hand preference, or any of the toddler hand preference groups.…”

Section: Discussionmentioning

confidence: 99%

Early, concurrent, and consistent hand preferences predict stacking in toddlerhood

Marcinowski

Nelson

Campbell

et al. 2023

Developmental Psychobiology

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Stacking is a hallmark of fine motor skill development and requires skilled hand use.One mechanism for children to gain manual proficiency involves establishing a hand preference that creates practice differences between the hands as the preferred hand is used more often and in different ways than the other. Prior work found that stacking skill emerged earlier for infants with an identifiable hand preference. However, it is not known how hand preference relates to later toddler stacking performance. This study examined the effects of early hand preference (infant pattern), concurrent hand preference (toddler pattern), and consistent hand preference (infant to toddler pattern) on toddler stacking skills. Sixty-one toddlers, whose hand preferences as infants were known, were assessed for their toddler hand preference and their stacking skill across 7 monthly visits from 18 to 24 months of age. Using multilevel Poisson longitudinal analysis, children with hand preferences that were consistent across both infancy and toddlerhood were more successful at stacking, compared to those with inconsistent preferences across the infant and toddler periods. Thus, consistency of hand preferences during the first 2 years likely contributes toward individual differences in the development of fine motor skills.

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“…The palmar grasp reflex can be stimulated by moving an object distally along the palm. The right hand is more dominant than the left hand in the palmar grasp reflex in newborns (Fagard et al, 2017). At the beginning of the bath, the researcher moved their index finger distally along the palm of the baby’s right hand, thereby stimulating the palmar grasp reflex.…”

Section: Methodsmentioning

confidence: 99%

Effect of Palmar Grasp Reflex Stimulation on Physiological Parameters and Crying Time During Neonatal Bath: A Randomized Controlled Trial

Kadiroğlu

Koç

2022

Biological Research For Nursing

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Objective This study aimed to determine the effect of palmar grasp reflex stimulation during a neonatal bath on the physiological parameters and crying time of the newborn. Design, Setting, and Participants This study was designed as a parallel randomized clinical trial. Parents fully understood the study procedure at the Neonatal Intensive Care Unit in Turkey ( N = 82). Both written and verbal consent was obtained from the parents. Newborns who were ineligible for tub bathing were excluded from the study. The babies in the control group were given baths according to the tub bathing standards. Babies in the experimental group were given palmar grasp reflex stimulation during the baths. The variables examined included body temperature, respiratory rate, pulse, oxygen saturation levels, and crying time. In all analyses, p < 0.05 was accepted as statistically significant. Results The heart rate of the experimental group was 5.2 beats per minute slower than the control group (χ2 = 12.272; p < 0.001). The respiratory rate of the experimental group was 1.3 lower per minute compared to the control group (χ2 = 43.219; p < 0.001). In addition, the oxygen saturation level (%) of the experimental group was 0.4 higher than the control group (χ2 = 5.793; p < 0.016). Crying time was higher in the control group during bathing ( p < 0.001). Conclusion The results showed that the palmar grasp reflex in newborn bathing helps to maintain the stability of physiological parameters and shortens the crying time of babies. Palmar grasp reflex stimulation is recommended in interventions that may cause stress.

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How should we test infant handedness?

Cited by 16 publications

References 50 publications

Assessment and analysis of human laterality for manipulation and communication using the Rennes Laterality Questionnaire

Assessment and analysis of human laterality for manipulation and communication using the Rennes Laterality Questionnaire

Early, concurrent, and consistent hand preferences predict stacking in toddlerhood

Effect of Palmar Grasp Reflex Stimulation on Physiological Parameters and Crying Time During Neonatal Bath: A Randomized Controlled Trial

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