Please use this identifier to cite or link to this item:
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:
Keywords: tilt illusion
surround induction
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.
Rights: This item has been embargoed for a period. During the embargo please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Notes: Output Status: Forthcoming/Available Online

Files in This Item:
File Description SizeFormat 
Akgoz_Gheorghiu_Kingdom_JOV_2022.pdfFulltext - Accepted Version1.64 MBAdobe PDFUnder Embargo until 2024-06-06    Request a copy

Note: If any of the files in this item are currently embargoed, you can request a copy directly from the author by clicking the padlock icon above. However, this facility is dependent on the depositor still being contactable at their original email address.

This item is protected by original copyright

Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

The metadata of the records in the Repository are available under the CC0 public domain dedication: No Rights Reserved

If you believe that any material held in STORRE infringes copyright, please contact providing details and we will remove the Work from public display in STORRE and investigate your claim.