. Author manuscript; available in PMC: 2010 Sep 1.

Published in final edited form as: J Autism Dev Disord. 2009 May 5;39(9):1305–1320. doi: 10.1007/s10803-009-0746-z

Table 2.

Algorithm Items

12–20/NV21–30 (12–20 months & Non-verbal 21–30 months)	V21–30 (Verbal 21–30 months)
Social Affect
Frequency of Spontaneous Vocalization Directed to Others	Response to Name
Gestures	Ignore
Shared Enjoyment in Interaction	Requesting
Showing	Pointing
Unusual Eye Contact	Unusual Eye Contact
Facial Expressions Directed to Others	Facial Expressions Directed to Others
Integration of Gaze and Other Behaviors During Social Overtures	Integration of Gaze and Other Behaviors During Social Overtures
Spontaneous Initiation of Joint Attention	Spontaneous Initiation of Joint Attention
Response to Joint Attention	Amount of Social Overtures/Maintenance of Attention: CAREGIVER
Quality of Social Overtures	Quality of Social Overtures
	Overall Quality of Rapport

Restricted, Repetitive Behaviors
Unusual Sensory Interest in Play Material/Person	Unusual Sensory Interest in Play Material/Person
Hand and Finger Movements/Posturing	Hand and Finger Movements/Posturing
Unusually Repetitive Interests or Stereotyped Behaviors	Unusually Repetitive Interests or Stereotyped Behaviors
Intonation of Vocalizations or Verbalizations

Note. 12–20/NV21–30 algorithm is a modified version of the Revised Module 1, No Words algorithm from Gotham, K., Risi, S., Pickles, A., & Lord, C. (2007). The Autism Diagnostic Observation Schedule (ADOS): Revised algorithms for improved diagnostic validity. Journal of Autism and Developmental Disorders, 37(4), 613–627.