Chapter 7
Developmental Asynchrony and De´calage
123
Figure 7.5
(continued)
in all media (spoken, written, and electronic), as can occur due to genetic
differences (Vodopiutz, Item, Ha¨usler, Korall, & Bodamer, 2007), can
be situationally defined (as is often the case with selective mutism
21
),
or limited to specific forms of speech. In some instances, a child’s speech
is unremarkable save a persistent failure to use pronouns (
he, she
) or
persistent syntactic errors (
“I out go”
).
Developmental expressive language disorders occur among 10 to
15% of children under 3 years of age, and in 3 to 7% of grade-school
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