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@ARTICLE{Memis:1035384,
author = {Memis, Elif and Yildiz, Gizem Y. and Fink, Gereon R. and
Weidner, Ralph},
title = {{H}idden size: {S}ize representations in implicitly coded
objects},
journal = {Cognition},
volume = {256},
issn = {0010-0277},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2025-00431},
pages = {106041 -},
year = {2025},
note = {Open access publication funded by the Deutsche
Forschungsgemeinschaft (DFG, German Research Foundation) –
491111487. GRF gratefully acknowledges support by the
Deutsche Forschungsgemeinschaft (DFG, German Research
Foundation) (Project- ID 431549029—SFB 1451).},
abstract = {Its angular representation on the retina does not solely
determine the perceived size of an object. Instead,
contextual information is interpreted. We investigated the
levels of processing at which this interpretation occurs.
Combining three experimental paradigms, we explored whether
masked and more implicitly coded objects are already
size-rescaled. We induced object size rescaling using a
modified variant of the Ebbinghaus illusion. In this
variant, six dots altered the size of a central stimulus and
served as inducers generating Object-Substitution Masking
(OSM). Participants reported the average size of multiple
circles using the size-averaging paradigm, allowing us to
test the contribution of masked and non-masked central
target circles. Our Ebbinghaus illusion variant altered
perceived stimulus size and showed robust masking via OSM.
Furthermore, size-averaging was sensitive enough to detect
perceived size changes in the magnitude of the ones induced
by the Ebbinghaus illusion. Finally, combining all three
paradigms, we observed that masked and non-masked stimuli
contributed to size averaging in a size-rescaled manner. In
a control experiment testing the general effects of
Ebbinghaus inducers, we observed a contrast-like effect on
size averaging. Large inducers decreased the perceived
average size, while small inducers increased it. In summary,
our experiments indicate that context integration, induced
by the Ebbinghaus illusion, alters size representations at
an early stage. These modified size representations are
independent of whether a target is recognisable. Moreover,
perceived average size appears to be coded relative to
surrounding perceptual groups.Keywords: Context integration;
Ebbinghaus illusion; Object-substitution masking (OSM);
Rescaled size perception in masked objects; Size averaging;
Size illusion.},
cin = {INM-3},
ddc = {150},
cid = {I:(DE-Juel1)INM-3-20090406},
pnm = {5251 - Multilevel Brain Organization and Variability
(POF4-525) / DFG project G:(GEPRIS)491111487 -
Open-Access-Publikationskosten / 2025 - 2027 /
Forschungszentrum Jülich (OAPKFZJ) (491111487)},
pid = {G:(DE-HGF)POF4-5251 / G:(GEPRIS)491111487},
typ = {PUB:(DE-HGF)16},
pubmed = {39671981},
UT = {WOS:001388874100001},
doi = {10.1016/j.cognition.2024.106041},
url = {https://juser.fz-juelich.de/record/1035384},
}