Familial handedness and spatial ability: A study with Chinese students aged 14–24

Li, Chieh; Zhu, Wenbin; Nuttall, Ronald L.

doi:10.1016/s0278-2626(03)00041-1

Cited by 14 publications

(9 citation statements)

References 23 publications

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“…We also classified handedness and footedness as categorical variables using four different classification systems that have been used in the literature. The classification systems were as follows: Left–right: EHI/WFQ LQs < 0 were classified as left-preferent and EHI/WFQ LQs of > 0 as right-preferent 56 , 57 Left-mixed-right 40: EHI/WFQ LQs < − 40 were classified as left-preferent, EHI/WFQ LQs of > + 40 as right-preferent and all other LQs as mixed-preferent 58 – 60 Left-mixed-right 60: EHI/WFQ LQs < − 60 were classified as left-preferent, EHI/WFQ LQs of > + 60 as right-preferent and all other LQs as mixed-preferent 61 , 62 Left-mixed-right asymmetrical: EHI/WFQ LQs < − 6 were classified as left-preferent, EHI/WFQ LQs of > + 72 as right-preferent and all other LQs as mixed-preferent (based on latent variable analysis from Tran et al 27 ) …”

Section: Methodsmentioning

confidence: 99%

A large-scale estimate on the relationship between language and motor lateralization

Packheiser

Schmitz

Arning

et al. 2020

Sci Rep

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Human language is dominantly processed in the left cerebral hemisphere in most of the population. While several studies have suggested that there are higher rates of atypical right-hemispheric language lateralization in left-/mixed-handers, an accurate estimate of this association from a large sample is still missing. In this study, we comprised data from 1,554 individuals sampled in three previous studies in which language lateralization measured via dichotic listening, handedness and footedness were assessed. Overall, we found a right ear advantage indicating typical left-hemispheric language lateralization in 82.1% of the participants. While we found significantly more left-handed individuals with atypical language lateralization on the categorical level, we only detected a very weak positive correlation between dichotic listening lateralization quotients (LQs) and handedness LQs using continuous measures. Here, only 0.4% of the variance in language lateralization were explained by handedness. We complemented these analyses with Bayesian statistics and found no evidence in favor of the hypothesis that language lateralization and handedness are related. Footedness LQs were not correlated with dichotic listening LQs, but individuals with atypical language lateralization also exhibited higher rates of atypical footedness on the categorical level. We also found differences in the extent of language lateralization between males and females with males exhibiting higher dichotic listening LQs indicating more left-hemispheric language processing. Overall, these findings indicate that the direct associations between language lateralization and motor asymmetries are much weaker than previously assumed with Bayesian correlation analyses even suggesting that they do not exist at all. Furthermore, sex differences seem to be present in language lateralization when the power of the study is adequate suggesting that endocrinological processes might influence this phenotype.

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Section: Methodsmentioning

confidence: 99%

A large-scale estimate on the relationship between language and motor lateralization

Packheiser

Schmitz

Arning

et al. 2020

Sci Rep

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“…However, research also suggests that one reason for the discrepant findings may be methodological inconsistencies. Studies differed with regard to (a) how participants were categorized according to handedness (e.g., right-/left-handers, right-/left-/mixed-handers, non-right-/right-handers), which causes difficulties for comparing the outcomes between studies (Casey, 1996b; Cerone and McKeever, 1999; Li et al, 2003; Nicholls et al, 2010); (b) ages and educational levels (e.g., primary school children, middle- and high-school students, adults) of the participants; and (c) the specific mathematical abilities assessed (e.g., simple arithmetic or problem-solving).…”

Section: Methodsmentioning

confidence: 99%

The Relationship between Handedness and Mathematics Is Non-linear and Is Moderated by Gender, Age, and Type of Task

et al. 2017

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The relationship between handedness and mathematical ability is still highly controversial. While some researchers have claimed that left-handers are gifted in mathematics and strong right-handers perform the worst in mathematical tasks, others have more recently proposed that mixed-handers are the most disadvantaged group. However, the studies in the field differ with regard to the ages and the gender of the participants, and the type of mathematical ability assessed. To disentangle these discrepancies, we conducted five studies in several Italian schools (total participants: N = 2,314), involving students of different ages (six to seventeen) and a range of mathematical tasks (e.g., arithmetic and reasoning). The results show that (a) linear and quadratic functions are insufficient for capturing the link between handedness and mathematical ability; (b) the percentage of variance in mathematics scores explained by handedness was larger than in previous studies (between 3 and 10% vs. 1%), and (c) the effect of handedness on mathematical ability depended on age, type of mathematical tasks, and gender. In accordance with previous research, handedness does represent a correlate of achievement in mathematics, but the shape of this relationship is more complicated than has been argued so far.

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“…Lateralization quotients (LQs) were calculated using the following formula: LQ = [(R-L)/(R + L)] * 100, with R indicating the number of right preferred tasks and L the number of left preferred tasks of the EHI items. The cut-offs for left-handedness and right-handedness (< −40 and > + 40, respectively) were derived from previous studies (Li et al, 2003) based on findings linking handedness to cognitive abilities (Burnett et al, 1982). There were no sex differences in EHI scores [t(50) = 1.13, p > 0.250].…”

Section: Participantsmentioning

confidence: 99%

Using Mobile EEG to Investigate Alpha and Beta Asymmetries During Hand and Foot Use

et al. 2020

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The Edinburgh Handedness Inventory (EHI) and the Waterloo Footedness Questionnaire (WFQ) are two of the most widely used questionnaires to assess lateralized everyday behavior in human participants. However, it is unclear to what extent the specific behavior assessed in these questionnaires elicit lateralized neural activity when performed in real-life situations. To illuminate this unresolved issue, we assessed EEG alpha and beta asymmetries during real-life performance of the behaviors assessed in the EHI and WFQ using a mobile EEG system. This methodology provides high ecological validity for studying neural correlates of motor behavior under more naturalistic conditions. Our results indicate that behavioral performance of items of both the EHI and WFQ differentiate between left-and right-handers and left-and rightfooters on the neural level, especially in the alpha frequency band. These results were unaffected by movement parameters. Furthermore, we could demonstrate that neural activity elicited specifically during left-sided task performance provides predictive power for the EHI or WFQ score of the participants. Overall, our results show that these prominent questionnaires not only distinguish between different motor preferences on the behavioral level, but also on the neurophysiological level. Furthermore, we could show that mobile EEG systems are a powerful tool to investigate motor asymmetries in ecologically valid situations outside of the laboratory setting. Future research should focus on other lateralized behavioral phenotypes in real-life settings to provide more insights into lateralized motor functions.

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Familial handedness and spatial ability: A study with Chinese students aged 14–24

Cited by 14 publications

References 23 publications

A large-scale estimate on the relationship between language and motor lateralization

A large-scale estimate on the relationship between language and motor lateralization

The Relationship between Handedness and Mathematics Is Non-linear and Is Moderated by Gender, Age, and Type of Task

Using Mobile EEG to Investigate Alpha and Beta Asymmetries During Hand and Foot Use

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