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Part II
Developmental Theory in Overview
For this reason, contemporary developmental linguists refer to a
sensitive period
for language development.
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In general, a sensitive period
is a window of opportunity during which the brain may be particularly
receptive to certain kinds of input and after which development is
relatively difficult or imperfect, though usually not impossible (Shafer &
Garrido-Nag, 2007).
Children who endure the extremes of abuse and neglect in their
early years may, among many other developmental deficiencies, lack
adequate early-language experience. The extremes of deprivation can
compromise not only the timing, pace, and trajectory of language devel-
opment (Berk, 2004; Kotulak, 2008), but even the overall organization
of brain development globally (Perry & Pollard, 1997).
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