Absence of the horizontal-vertical illusion in haptic space

R. H. Day*, G.C. Avery

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)


Discusses an earlier experiment which showed that the so-called horizontal-vertical (HV) illusion with an + is a function of the retinal meridians with which the 2 lines correspond. This finding indicates that the illusion is specifically visual and would not be expected to occur haptically. The present experiment, using 8 male and 6 female undergraduates, shows that a large haptic illusion occurred with an inverted T figure. However, as predicted, no illusion occurred with the L figure. (PsycINFO Database Record (c) 2006 APA, all rights reserved).

Original languageEnglish
Pages (from-to)172-173
Number of pages2
JournalJournal of Experimental Psychology
Issue number1 PART 1
Publication statusPublished - Jan 1970


  • absence of horizontal-vertical illusion in haptic space


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