Comparison of the haptic and visual deviations in a parallelity task.
Deviations in both haptic and visual spatial experiments are thought to be caused by a biasing influence of an egocentric reference frame. The strength of this influence is strongly participant-dependent. By using a parallelity test, it is studied whether this strength is modality-independent. In both haptic and visual conditions, large, systematic and participant-dependent deviations were found. However, although the correlation between the haptic and visual deviations was significant, the explained variance due to a common factor was only 20%. Therefore, the degree to which a participant is "egocentric" depends on modality and possibly even more generally, on experimental condition.
Helmholtz Institute, Physics of Man, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands. a.m.l.kappers@uu.nl
Astrid M L
AM
Kappers
Wouter B
WB
Schakel
D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D010775:Photic Stimulation / Q000379:methods*; D011597:Psychomotor Performance / Q000502:physiology*; D013028:Space Perception / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology; D055815:Young Adult