Direction of hair whorl and handedness

Beaton, Alan A.; Mellor, Gary

doi:10.1080/13576500601112358

Cited by 16 publications

(13 citation statements)

References 18 publications

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“…We found no significant relationship between hair whorl rotation pattern and handedness, contrasting with two studies (Beaton & Mellor, 2007;Klar, 2003), but consistent with the others (Annett, 1985;Collins, 1977;Jansen et al, 2007;Newman, 1934;Rahman et al, 2009). Also, we found no significant relationship between hair whorl rotation pattern and sexual orientation, contrasting with previous results in a much smaller sample (Klar, 2004), but consistent with another smaller sample (Rahman et al, 2009).…”

Section: Hair Whorlcontrasting

confidence: 70%

“…Subsequently, in a study of men in Wales (N = 173), a handedness and hair whorl association was detected with a higher rate of CCW in the NRH group (54% of 48 NRH) than the RH group (13% of 125 RH) (Beaton & Mellor, 2007). However, a substantially larger study, in a predominantly (90%) male German military sample (N = 1,212), found no significant association between handedness and hair whorl (Jansen et al, 2007).…”

Section: Handedness and Hair Whorlmentioning

confidence: 94%

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Biodemographic and Physical Correlates of Sexual Orientation in Men

et al. 2009

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To better understand sexual orientation from an evolutionary perspective, we investigated whether, compared to heterosexual men, the fewer direct descendants of homosexual men could be counterbalanced by a larger number of other close biological relatives. We also investigated the extent to which three patterns generally studied separately--handedness, number of biological older brothers, and hair-whorl rotation pattern--correlated with each other, and for evidence of replication of previous findings on how each pattern related to sexual orientation. We surveyed at Gay Pride and general community festivals, analyzing data for 894 heterosexual men and 694 homosexual men, both groups predominantly (*80%) white/non-Hispanic. The Kinsey distribution of sexual orientation for men recruited from the general community festivals approximated previous population-based surveys. Compared to heterosexual men, homosexual men had both more relatives, especially paternal relatives, and more homosexual male relatives. We found that the familiality for male sexual orientation decreased with relatedness, i.e., when moving from first-degree to seconddegree relatives. We also replicated the fraternal birth order effect. However, we found no significant correlations among handedness, hair whorl rotation pattern, and sexual orientation, and, contrary to some previous research, no evidence that male sexual orientation is transmitted predominantly through the maternal line.

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Section: Hair Whorlcontrasting

confidence: 70%

Section: Handedness and Hair Whorlmentioning

confidence: 94%

Biodemographic and Physical Correlates of Sexual Orientation in Men

et al. 2009

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“…A recent paper seem to confirm Klar's findings: Beaton and Mellor (2007) claim to confirm the association between direction of hair whorl and handedness. Using either 274 or 273 participants (the exact number is not HANDEDNESS AND SCALP HAIR WHORL clear since their narrative indicates 49 ''non-right-handers'' whereas their table lists 48), Beaton and Mellor calculate a significant chi-square.…”

Section: Past Researchsupporting

confidence: 68%

Human handedness and scalp hair whorl direction: No evidence for a common cause

Perelle¹,

Chanza²

2009

Laterality: Asymmetries of Body, Brain and Cognition

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A much wider variation in many physical and cognitive behaviours exists among left-handers than among right-handers, which is evidence for more than one aetiology of left-handedness. Despite these findings some researchers are still attempting to link left-handedness to a single cause, most recently genetic determination, by pairing left-handedness with a presumed genetically based characteristic. One of these characteristics is scalp hair whorl, which may be clockwise, counter-clockwise (purportedly associated with left-handedness), or a reversal whorl (rare). Results of recent research in this topic are reviewed, our own findings are presented, and we conclude that there is no logical reason for, nor evidence of, a common aetiology of both hair whorl direction and handedness.

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“…Secondly, that the hair whorls were both clockwise is important, given Klar's (2003) claim of a culture-independent relationship between hair whorl, handedness and language lateralization (cf. Weber et al 2006;Beaton & Mellor, 2007;Jansen et al 2007). Unfortunately, it is not clear how this measure interacts with the mechanisms responsible for twinning in monozygotic handedness discordant twins (cf.…”

Section: Between-task Comparisons Brain and Behaviourmentioning

confidence: 99%

Crossed cerebral lateralization for verbal and visuo‐spatial function in a pair of handedness discordant monozygotic twins: MRI and fMRI brain imaging

et al. 2008

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To examine the nature of hemispheric lateralization for neural processes underlying verbal fluency and visuospatial attention, we investigated a single pair of handedness discordant monozygotic (MzHd) twins. Imaging of the brain was undertaken using magnetic resonance imaging (MRI) and functional magnetic resonance imaging (fMRI) in combination with manual performance tasks. The twins were discordant for MRI anatomical asymmetries of the pars triangularis and planum temporale, whose asymmetry was consistent with verbal laterality on fMRI. Thus, the right-handed twin had left lateralized verbal with right lateralized visuo-spatial attention, while the left-handed twin had right lateralized verbal with left lateralized visuo-spatial activation; these data lend further support for to the conclusions of Sommer et al.

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Direction of hair whorl and handedness

Cited by 16 publications

References 18 publications

Biodemographic and Physical Correlates of Sexual Orientation in Men

Biodemographic and Physical Correlates of Sexual Orientation in Men

Human handedness and scalp hair whorl direction: No evidence for a common cause

Crossed cerebral lateralization for verbal and visuo‐spatial function in a pair of handedness discordant monozygotic twins: MRI and fMRI brain imaging

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