Development of object permanence skills was examined longitudinally in 20 visually impaired infants (ages 4-25 months). Order of skill acquisition and span of time required to master skills paralleled that of sighted infants, but the visually impaired subjects were 8-12 months older than sighted counterparts when similar skills were acquired.…

The study evaluated positional concepts and balance performance in 67 blind/visually impaired children, age 6-13, to determine the most important conditioning factors. The study also evaluated the effects of 2 pedagogical situations: 1 with more cognitive activity and less motor activity, and the other with more motor activity and less cognitive…