Most children who are congenitally deafblind are severely delayed in their communication development and many will not achieve symbolic understanding and expression. This article discusses developmental markers cited in the research literature as predictive of or facilitative of the development of symbolism. These markers include the growth toward…

This paper summarizes our present knowledge and understanding of the processes and outcomes of learning. The basic idea about learning is that the outcomes of learning (e.g., propositional knowledge, procedural skills, and mental models) reflect differences in learning processes (e.g., encoding skills, attention allocation, and hypothesis…