usually what they ask about is a "significant general speech delay", so usually a minor delay isnt considered. the exact wording for asperger's is: "There is no clinically significant general delay in language (e.g., single words used by age 2 years, communicative phrases used by age 3 years)".
classic autism has a communication category that aspergers doesnt. there are 4 criteria in that communication section and if you fulfill any ONE criteria, its enough. besides speech delay, there is
- in individuals with adequate speech, marked impairment in the ability to initiate or sustain a conversation with others
- stereotyped and repetitive use of language or idiosyncratic language
- lack of varied, spontaneous make-believe play or social imitative play appropriate to developmental level
so if you had NO significant speech delay, and we were looking at only that one criterion, you could be either aspergers or classic autism. but if you have NO significant speech delay plus any one or more of those other three criteria, you could not be aspergers and would therefore be classic autism if you fulfill the rest of the criteria.
diagnosticians however sometimes will misdiagnose, it happens sometimes specifically with people who dont have the significant speech delay and they get dx aspergers based solely on that lack of delay, even tho they fit the other criteria in that category for classic autism. this happened with my son who was somewhat speech delayed but had single words by 2 and phrases by 3. he was dx as because the psych discounted or missed the fact that he fit all three of the other criteria.
you can find the exact diagnostic criteria for both at http://www.cdc.gov/ncbddd/autism/hcp-dsm.html
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Neurotypically confused.
partner to: D - 40 yrs med dx classic autism
mother to 3 sons:
K - 6 yrs med/school dx classic autism
C - 8 yrs NT
N - 15 yrs school dx AS