1.   Byrd said that the research did not explore why these differences occurred but that delaying kindergarten for children not getting appropriate stimulation probably compounded their problems.

2.   For instance, the ability to see normally depends on appropriate visual stimulation during the first years of life.

3.   If appropriate verbal stimulation is not provided at that time, the child will lack adequate understanding to profit from instruction in first grade.

4.   It all has to do with those phosphores, the liners of fluorescent tubes, which when applied to a surface, light up under appropriate stimulation.