External location of touch is constructed post-hoc based on limb choice

Femke Maij; Christian Seegelke; W Pieter Medendorp; Tobias Heed

Notably, other manipulations that have been used to argue for the relevance 564 of precise spatial representations in tactile decisions can be framed in such a 565 feature-based account as well. For instance, the TOJ crossing effect was reduced 566 when the two hands' positions differed in height or in depth (Azañón et al., 2016) . The copyright holder for this preprint (which was not peer-reviewed) is the author/funder. It . https://doi.org/10.1101/549832 doi: bioRxiv preprint Furthermore, our proposal contrasts with the suggestion that TOJ errors are 591 due to temporal confusion of the two stimuli, hypothesized to occur due to slowing 592 of a neural clock mechanism because crossed postures induce higher cognitive 593 load as compared to uncrossed postures (Kitazawa et al., 2008) . This hypothesis 594 is based on the assumption that tactile locations are represented correctly but 595 ordered incorrectly in time. It is incompatible with our finding that participants 596 The copyright holder for this preprint (which was not peer-reviewed) is the author/funder. It . https://doi.org/10.1101/549832 doi: bioRxiv preprint Toolbox (Brainard, 1997) Data preprocessing. Start and end of the movement were determined based on a 696 velocity threshold of 5 cm/s. We interpolated missing motion tracking data, for 697 instance due to obstruction when the hands passed each other or due to rotation 698 of the hands, using splines, with the restriction that movement onset and offset 699 could be determined. Trials were discarded when (1) marker data were missing at 700 . CC-BY-NC-ND 4.0 International license is made available under a The copyright holder for this preprint (which was not peer-reviewed) is the author/funder. It . https://doi.org/10.1101/549832 doi: bioRxiv preprint movement onset and/or movement offset (11.9±2.6%; mean±sem); (2) no stimulus 701 localization response, indicated by finger lifting, could be detected (5.4±1.3%; 702 mean±sem); (3) movement duration is less than 200 ms (0.2±0.05%; mean±sem). 703