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Investigating multidimensionality of language lateralisation in left and right handed adults : an update on Woodhead et al. 2019
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Woodhead, Zoe Victoria Joan, Thompson, Paul A., Karlsson, Emma and Bishop, Dorothy Vera Margaret (2021) Investigating multidimensionality of language lateralisation in left and right handed adults : an update on Woodhead et al. 2019. Discussion Paper. The Society for the Improvement of Psychological Science: PsyArXiv. (In Press)
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Official URL: https://doi.org/10.31234/osf.io/mrkgf
Abstract
A previous study we reported in this journal suggested that left and right handers may differ in their patterns of lateralisation for different language tasks. However, it had too few left handers (N=7) to reach any conclusions. For this update paper, further participants were added to the sample to create separate groups of left (N=31) and right handers (N=43). Two hypotheses were tested: 1) that lateralisation would be weaker at the group level in left than right handers; and 2) that left handers would show weaker covariance in lateralisation between tasks, supporting a two factor model.
All participants performed the same protocol as in our previous paper: lateralisation was measured using functional transcranial Doppler sonography during six different language tasks, on two separate testing sessions. The results supported hypothesis 1, with significant differences in laterality between groups for four out of six tasks. For hypothesis 2, structural equation modelling showed that there was stronger evidence for a two factor model in left than right handers; furthermore, examination of the factor loadings suggested that the pattern of laterality across tasks may also differ between handedness groups. These results expand on what is known about the differences in laterality between left and right handers.
| Item Type: | Working or Discussion Paper (Discussion Paper) | ||||||||
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| Divisions: | Faculty of Social Sciences > Centre for Educational Development, Appraisal and Research (CEDAR) | ||||||||
| Journal or Publication Title: | PsyArXiv | ||||||||
| Publisher: | PsyArXiv | ||||||||
| Place of Publication: | The Society for the Improvement of Psychological Science | ||||||||
| Official Date: | 3 February 2021 | ||||||||
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| DOI: | 10.31234/osf.io/mrkgf | ||||||||
| Institution: | University of Warwick | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | In Press | ||||||||
| Access rights to Published version: | Open Access |
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