Multiple Views: A Multiverse Analysis on Research on the Interhemispheric Deficit Theory of Dyslexia

The discussed research entails the replication of a previous study investigating the possible effect of the interhemispheric deficit theory of dyslexia, through researching the redundant bilateral advantage (RBA) for dyslexic and control participants. A multiverse analysis was performed on existing research, to provide more robust results, and replicate findings. Participants were excluded, assumptions checked, and outliers removed, resulting in twelve different datasets. The performed multiverse analysis looked at the significant presence of a RBA in controls, a significant difference in RBA between dyslexic and control participants, and a significant difference in between right visual field (RVF) and left visual field (LVF) conditions, in a VHF paradigm. The results concur with the study replicated, and all datasets showed the similar levels of significance. There was a significant RBA in the control group, yet no significant difference was found with the dyslexic group. A...Show moreThe discussed research entails the replication of a previous study investigating the possible effect of the interhemispheric deficit theory of dyslexia, through researching the redundant bilateral advantage (RBA) for dyslexic and control participants. A multiverse analysis was performed on existing research, to provide more robust results, and replicate findings. Participants were excluded, assumptions checked, and outliers removed, resulting in twelve different datasets. The performed multiverse analysis looked at the significant presence of a RBA in controls, a significant difference in RBA between dyslexic and control participants, and a significant difference in between right visual field (RVF) and left visual field (LVF) conditions, in a VHF paradigm. The results concur with the study replicated, and all datasets showed the similar levels of significance. There was a significant RBA in the control group, yet no significant difference was found with the dyslexic group. A significant difference in RVF and LVF difference was found between the groups. This was caused by lower LVF accuracy scores in the dyslexic group, suggesting the presence of an LVF cost in dyslexia. Handedness showed to have an influence on the RBA scores in participants. Future suggestions are made in regards to improved research designs and improvements in multiverse analyses for more robust and transparent research.Show less

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Multiple Views: A Multiverse Analysis on Research on the Interhemispheric Deficit Theory of Dyslexia