This study compared the performance on perspective-taking tasks of 8 congenitally blind children (mean age 13.5 years), using either haptic exploration or a vibrotactile prosthetic device, with the performance of 4 children having low vision using their limited visual abilities. The vibrotactile device improved perspective-taking performance…

An educational program was designed to introduce spatial concepts to 30 congenitally/early-blinded children, aged 8-14, using a modified Optacon of Telesensory Systems, Incorporated. Using the vibrotactile stimulation device, the children learned to identify various objects correctly and to describe their relative spatial arrangements. (Author/JDD)