| Institution: | (1) Helmholtz Institute, Psychological Laboratory, Utrecht University, Heidelberglaan 2, 3584 CS, Utrecht, The Netherlands,;(2) Helmholtz Institute, Physics of Man, Utrecht University, Princetonplein 5, 3584 CC, Utrecht, The Netherlands, |
| Abstract: | Systematic deviations occur when blindfolded subjects set a test bar parallel to a reference bar in the horizontal plane using
haptic information (Kappers and Koenderink 1999, Perception 28:781–795; Kappers 1999, Perception 28:1001–1012). These deviations
are assumed to reflect the use of a combination of a biasing egocentric reference frame and an allocentric, more cognitive
one (Kappers 2002, Acta Psychol 109:25–40). In two experiments, we have examined the effect of delay between the perception
of a reference bar and the parallel setting of a test bar. In both experiments a 10-s delay improved performance. The improvement
increased with a larger horizontal (left–right) distance between the bars. This improvement was interpreted as a shift from
the egocentric towards the allocentric reference frame during the delay period.
Electronic Publication |
