Schizotypy and handedness in Japanese participants, revisited

Laterality
Tomohisa Asai, Yoshihiko Tanno

Abstract

Although previous studies have suggested a relationship between mixed-handedness and schizotypic symptoms, possibly indicating a predisposition to schizophrenia, the participants involved were exclusively from Western cultures. Only two reports have examined the relationship between handedness and schizotypy in Asian cultures, and both of these studies failed to show a significant association between mixed-handedness and schizotypy, possibly due to cultural pressures against left-handedness. In the present study we examined the relationship between handedness and schizotypy among Japanese participants (N=231, study 1; N=274, study 2). In order to avoid cultural biases, we used a modified handedness scale in addition to the traditional scale developed in Western cultures. As a result, we show for the first time that mixed-handed Japanese participants have the strongest schizotypal traits, particularly positive schizotypic traits (p<.05). These results suggest that positive schizotypal traits may be universally associated with mixed-handedness or atypical cerebral lateralisation, even in non-Western cultures.

References

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Citations

Sep 18, 2010·Shinrigaku kenkyu : The Japanese journal of psychology·Tomohisa Asai, Yoshihiko Tanno
Feb 18, 2016·Laterality·Eric C Prichard, Stephen D Christman
Oct 24, 2015·Schizophrenia Research·Derek J DeanVijay A Mittal
Jun 12, 2010·Psychiatry Research·Tomohisa AsaiYoshihiko Tanno
Apr 28, 2009·Brain and Cognition·Tomohisa AsaiYoshihiko Tanno
Jan 15, 2015·Laterality·Yin-Ju LienHui-Chun Tsuang
May 2, 2014·Laterality·Alessandra LaiAntonio Preti
Jun 13, 2016·Psychiatry Research·Hui-Chun TsuangPo-Chang Hsiao
May 17, 2017·The Psychiatric Quarterly·Hui-Li Lin, Hui-Chun Tsuang

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