274:
38:
302:
210:
308:
313:
98:
153:
a cross (the test shape) surrounded by sets of squares of distinct size (the inducing shapes). As shown in the diagram, the three blue crosses in fig. 1.a, 1.b and 1.c are exactly the same size; however, the one on the left (fig. 1.a) appears larger. The illusion works even when the small squares completely occlude the blue cross (see fig. 1.c).
152:
Here are two relative size illusions described by
Italian visual researcher Gianni A. Sarcone in 1997 and 2013.The first relative-size illusion called Sarcone’s Crosses contradicts Ebbinghaus illusion (aka Titchener Circles, 1898) and Obonai square illusion (1954).Sarcone's cross illusion consists of
732:
273:
354:– You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
157:
In fig. 2.a and 2.b, by effect of assimilation, the diagonal red line within the large ellipse seems subjectively longer, but in fact the blue line is objectively the longest of both lines.
214:
232:
The
Wikimedia Foundation has received an e-mail confirming that the copyright holder has approved publication under the terms mentioned on this page. This correspondence has been
248:
677:
64:
60:
56:
52:
48:
42:
109:
77:
155:
In conclusion, there isn’t always correlation between the size of the surrounding shapes and the relative size perception of the test shape.
257:
226:
197:
641:
571:
535:
774:
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
361:
470:
832:
661:
625:
519:
491:
478:
463:
264:
591:
555:
436:
419:
498:
243:
239:
230:, you do not need to request permission as long as you follow any licensing requirements mentioned on this page.
323:
777:
If the file has been modified from its original state, some details may not fully reflect the modified file.
360:– If you remix, transform, or build upon the material, you must distribute your contributions under the
731:
726:
320:
68:
37:
265:
https://ticket.wikimedia.org/otrs/index.pl?Action=AgentTicketZoom&TicketNumber=2021121610010745
742:
117:
763:
221:
186:
166:
104:
295:
I, the copyright holder of this work, hereby publish it under the following license:
847:
256:
If you have questions about the archived correspondence, please use the
699:
Click on a date/time to view the file as it appeared at that time.
204:
92:
246:. The correspondence is available to trusted volunteers as
224:
and may be used by anyone for any purpose. If you wish to
572:
Creative
Commons Attribution-ShareAlike 4.0 International
403:
Add a one-line explanation of what this file represents
82:(4,201 × 2,703 pixels, file size: 436 KB, MIME type:
136:
116:
Commons is a freely licensed media file repository.
371:https://creativecommons.org/licenses/by-sa/4.0
97:
377:Creative Commons Attribution-Share Alike 4.0
301:
8:
337:– to copy, distribute and transmit the work
779:
701:
399:
786:Diagram Based on Gianni A. Sarcone's Work
324:Attribution-Share Alike 4.0 International
895:
887:
879:
871:
863:
855:
845:
837:
827:
819:
811:
803:
794:
789:
781:
761:
675:
659:
639:
623:
605:
589:
569:
553:
533:
517:
450:
434:
417:
414:
395:
388:
270:Find other files from the same ticket:
209:
7:
240:Volunteer Response Team (VRT) member
759:The following page uses this file:
749:User created page with UploadWizard
690:
312:
307:
234:
142:Sarcone Relative Size Illusions.jpg
772:
408:
402:
298:
294:
146:
129:
75:
797:Sarcone's Relative Size Illusions
407:
393:
348:Under the following conditions:
319:This file is licensed under the
311:
306:
300:
272:
208:
96:
21:
881:Date metadata was last modified
390:
147:
14:
389:
26:
1:
642:original creation by uploader
31:
833:Adobe Photoshop CS Macintosh
662:Wikimedia VRTS ticket number
464:object of statement has role
415:Items portrayed in this file
873:Date and time of digitizing
167:28 September 2015, 14:13:15
917:
362:same or compatible license
839:File change date and time
691:
176:
16:
892:relative size perception
884:14:27, 28 September 2015
876:14:13, 28 September 2015
842:12:27, 28 September 2015
727:11:10, 28 September 2015
392:
328:
249:ticket #2021121610010745
207:
103:This is a file from the
748:
192:
182:
172:
165:
162:
139:
107:. Information from its
110:description page there
41:Size of this preview:
813:Horizontal resolution
69:4,201 × 2,703 pixels
65:2,560 × 1,647 pixels
821:Vertical resolution
343:– to adapt the work
47:Other resolutions:
492:Wikimedia username
479:author name string
244:permission archive
242:and stored in our
61:1,280 × 824 pixels
57:1,024 × 659 pixels
904:
903:
764:Gianni A. Sarcone
752:
607:28 September 2015
556:copyright license
401:
285:
284:
281:
280:
271:
267:
261:
201:
198:Reusing this file
125:
124:
105:Wikimedia Commons
908:
798:
780:
739:
678:2021121610010745
520:copyright status
501:
496:
486:
483:
473:
468:
384:
381:
378:
375:
372:
364:as the original.
321:Creative Commons
315:
314:
310:
309:
304:
303:
276:
269:
262:
255:
236:
227:use this content
216:
212:
211:
205:
195:
178:
168:
151:
143:
137:
121:
100:
99:
93:
87:
85:
72:
53:640 × 412 pixels
49:320 × 206 pixels
43:800 × 515 pixels
916:
915:
911:
910:
909:
907:
906:
905:
796:
768:
753:
745:
737:
693:
692:
689:
688:
687:
686:
685:
684:
683:
682:
680:
668:
667:
666:
664:
653:
652:
651:
650:
649:
648:
647:
646:
644:
632:
631:
630:
628:
617:
616:
615:
614:
613:
612:
611:
610:
608:
598:
597:
596:
594:
583:
582:
581:
580:
579:
578:
577:
576:
574:
562:
561:
560:
558:
547:
546:
545:
544:
543:
542:
541:
540:
538:
526:
525:
524:
522:
511:
510:
509:
508:
507:
506:
505:
504:
503:
502:
497:
494:
488:
487:
484:
481:
475:
474:
469:
466:
457:
456:
455:
453:
443:
442:
441:
439:
428:
427:
426:
425:
424:
422:
406:
405:
404:
387:
386:
385:
382:
379:
376:
373:
370:
369:
327:
316:
297:
296:
291:
286:
258:VRT noticeboard
158:
141:
134:
127:
126:
115:
114:
113:is shown below.
89:
83:
81:
74:
73:
46:
12:
11:
5:
914:
912:
902:
901:
898:
894:
893:
890:
886:
885:
882:
878:
877:
874:
870:
869:
866:
862:
861:
858:
854:
853:
850:
844:
843:
840:
836:
835:
830:
826:
825:
822:
818:
817:
814:
810:
809:
806:
802:
801:
800:
799:
792:
788:
787:
784:
771:
767:
766:
757:
756:
751:
750:
747:
743:
740:
736:4,201 × 2,703
734:
729:
724:
720:
719:
716:
713:
710:
707:
704:
697:
696:
681:
676:
674:
673:
672:
671:
670:
669:
665:
660:
658:
657:
656:
655:
654:
645:
640:
638:
637:
636:
635:
634:
633:
629:
626:source of file
624:
622:
621:
620:
619:
618:
609:
606:
604:
603:
602:
601:
600:
599:
595:
590:
588:
587:
586:
585:
584:
575:
570:
568:
567:
566:
565:
564:
563:
559:
554:
552:
551:
550:
549:
548:
539:
534:
532:
531:
530:
529:
528:
527:
523:
518:
516:
515:
514:
513:
512:
490:
489:
477:
476:
462:
461:
460:
459:
458:
454:
451:
449:
448:
447:
446:
445:
444:
440:
435:
433:
432:
431:
430:
429:
423:
418:
416:
413:
412:
411:
410:
409:
398:
397:
394:
391:
368:
367:
366:
365:
355:
346:
345:
344:
338:
331:You are free:
318:
317:
299:
293:
292:
290:
287:
283:
282:
279:
278:
218:
202:
190:
189:
184:
180:
179:
174:
170:
169:
164:
160:
159:
144:
135:
133:
130:
128:
123:
122:
101:
91:
90:
40:
36:
35:
34:
29:
24:
19:
13:
10:
9:
6:
4:
3:
2:
913:
899:
896:
891:
888:
883:
880:
875:
872:
867:
864:
859:
856:
851:
849:
846:
841:
838:
834:
831:
829:Software used
828:
823:
820:
815:
812:
807:
804:
795:
793:
790:
785:
782:
778:
775:
769:
765:
762:
760:
754:
746:
744:Ruotailfoglio
741:
735:
733:
730:
728:
725:
722:
721:
717:
714:
711:
708:
705:
703:
702:
700:
694:
679:
663:
643:
627:
593:
573:
557:
537:
521:
500:
499:Ruotailfoglio
493:
485:Ruotailfoglio
480:
472:
465:
438:
421:
374:CC BY-SA 4.0
363:
359:
356:
353:
350:
349:
347:
342:
339:
336:
333:
332:
330:
329:
325:
322:
305:
288:
277:
275:
268:
266:
263:Ticket link:
259:
253:
251:
250:
245:
241:
237:
229:
228:
223:
220:This work is
219:
217:
206:
203:
199:
194:
191:
188:
187:Ruotailfoglio
185:
181:
175:
171:
161:
156:
150:
145:
138:
131:
119:
112:
111:
106:
102:
95:
94:
88:
79:
78:Original file
70:
66:
62:
58:
54:
50:
44:
39:
33:
30:
28:
25:
23:
20:
18:
15:
865:Image height
776:
773:
758:
698:
695:File history
471:photographer
357:
351:
340:
334:
254:
247:
233:
231:
225:
213:
154:
148:
118:You can help
108:
76:
22:File history
897:IIM version
857:Image width
848:Color space
805:Orientation
791:Short title
536:copyrighted
358:share alike
352:attribution
140:Description
755:File usage
712:Dimensions
452:some value
193:Permission
84:image/jpeg
27:File usage
709:Thumbnail
706:Date/Time
592:inception
289:Licensing
149:English:
889:Keywords
868:2,703 px
860:4,201 px
770:Metadata
738:(436 KB)
396:Captions
341:to remix
335:to share
326:license.
235:reviewed
177:Own work
32:Metadata
824:300 dpi
816:300 dpi
723:current
718:Comment
437:creator
420:depicts
400:English
132:Summary
80:
808:Normal
783:Author
215:
183:Author
173:Source
238:by a
852:sRGB
715:User
383:true
380:true
222:free
163:Date
17:File
495::
482::
467::
252:.
67:|
63:|
59:|
55:|
51:|
45:.
900:2
260:.
200:)
196:(
120:.
86:)
71:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
