As a child progresses from a newborn to infancy to
toddlerhood, we see several developmental changes in all dimensions. The
physical bodily growth, advancement of language, communicating with words and
actions, as well as the rest of the world around; is all part of the
developmental spectrum. Sometimes some children lag behind in one or more of
the aspect of this spectrum. Such a lag in either one or all of speech,
relatedness, communication and expression leads to a problem called pervasive
developmental disorder (PDD). Autism is one such type of PDD.
