http://hdl.handle.net/1893/34530
Appears in Collections: | Psychology Journal Articles |
Peer Review Status: | Refereed |
Title: | Small-angle attraction in the tilt illusion |
Author(s): | Akgöz, Ayşe Gheorghiu, Elena Kingdom, Frederick |
Contact Email: | elena.gheorghiu@stir.ac.uk |
Keywords: | tilt illusion surround induction texture assimilation |
Date Deposited: | 25-Jul-2022 |
Citation: | Akgöz A, Gheorghiu E & Kingdom F (2022) Small-angle attraction in the tilt illusion. Journal of Vision, 22. |
Abstract: | The tilt illusion (TI) describes the phenomenon in which a surround inducer grating of a particular orientation influences the perceived orientation of a central test grating. Typically, inducer-test orientation differences of 5-40 deg cause the test orientation to appear shifted away from the inducer orientation, i.e. showing repulsion. For orientation differences of 60-90 deg, the inducer typically causes the test grating orientation to appear shifted towards the inducer orientation, termed here “large-angle” attraction. Both repulsion and large-angle attraction effects have been observed in contrast-modulated as well as luminance-modulated grating patterns. Here we show that a secondary, “small-angle” 0-10 deg attraction effect is observed in contrast-modulated and orientation-modulated gratings, as well as in luminance-modulated gratings that are relatively low in spatial frequency, low in contrast or contain added texture. The observed small-angle attraction, which can exceed in magnitude that of the repulsion and large-angle attraction effects, is dependent on the spatial phase relationship between the inducer and test, being maximal when in-phase. Both small-angle attraction and repulsion effects are reduced when a gap is introduced between test and inducer. Our findings suggest that small-angle attraction in the TI is a result of assimilation of the inducer pattern into the receptive fields of the neurons sensitive to the test. |
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Notes: | Output Status: Forthcoming/Available Online |
File | Description | Size | Format | |
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Akgoz_Gheorghiu_Kingdom_JOV_2022.pdf | Fulltext - Accepted Version | 1.64 MB | Adobe PDF | Under Embargo until 2024-06-06 Request a copy |
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