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Table 3 DSM-IV Criteria for Autism Disorder, and Scoring

From: Corticosteroid therapy in regressive autism: a retrospective study of effects on the Frequency Modulated Auditory Evoked Response (FMAER), language, and behavior

Criteria: A subject must have a total of six (or more) items from A1, A2, and A3. with at least two from A1 and at least one each from A2 and A3
A1. Qualitative impairment in social interaction, as manifested by at least two of the following:
 A1a) Marked impairment in the use of multiple nonverbal behaviors such as eye-to-eye gaze, facial expression, body postures, and gestures to regulate social interaction.
 A1b) Failure to develop peer relationships appropriate to developmental level
 A1c) Lack of spontaneous seeking to share enjoyment, interests, or achievements with other people (e.g., by lack of showing, bringing, or pointing out objects of interest)
 A1d) Lack of social or emotional reciprocity
A2. Qualitative impairments in communication as manifested by at least one of the following:
 A2a) Delay in, or total lack of, the development of spoken language (not accompanied by an attempt to compensate through alternative modes of communication such as gesture or mine)
 A2b) In individuals with adequate speech, marked impairment in the ability to initiate or sustain a conversation with others (omitted from scoring – see text)
 A2c) Stereotyped and repetitive use of language or idiosyncratic language
 A2d) Lack of varied, spontaneous make-believe play or social imitative play appropriate to developmental level
A3. Restricted repetitive and stereotyped patterns of behavior, interests and activities, as manifested by at least one of the following:
 A3a) Encompassing preoccupation with one or more stereotyped patterns of behavior and restricted patterns of interest that is abnormal either in intensity or focus
 A3b) Apparently inflexible adherence to specific, nonfunctional routines or interests
 A3c) Stereotyped and repetitive motor mannerisms (e.g., hand or finger flapping or twisting, or complex whole-body movements)
 A3d) Persistent preoccupation with parts of objects
B. A subject must show delays or abnormal functioning in at least one of the following areas, with onset prior to 3 years:
 B1) Social interaction
B 2) Language as used in social communication
 B3) Symbolic or imaginative play
Graded scoring – each item: (Item A2b omitted)
 0  = absent
 1  = possibly or very mildly present
 2  = definitely present
 3  = a very dominant characteristic
 Overall score  = average of 14 scored items