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).
- absence of horizontal-vertical illusion in haptic space