VIDBE-Q Volume 65 Issue 2
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development slowed or stopped altogether once they reached adolescence.
Overall, both Terry and Ian's data indicated significant communication delays even
when growth was reported. Although the data did not indicate the reason(s) for this
beyond the impact of a dual sensory loss, one could speculate the possibility that
consistency of service delivery could have alleviated at least some of the delay.
Figure 3. Ian's communication development over time (Probst, 2017).
Discussion
This study attempted to measure the communication development of learners
who are DB over time because there is little research in this area. When
contemplating the unique communication needs of learners who are DB,
educational teams must understand the need to break down communication to very
minute steps: (1) preintentional behavior; (2) intentional behavior; (3) pre-
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