irritability; frequent behavioral outbursts).
2. Attention deficit (e.g., difficulty shifting attention; difficulty sustaining mental effort).
3. Impairment in impulse control (e.g., difficulty waiting turn; difficulty complying with
rules).
D. Impairment in adaptive functioning as manifested by two or more of the following, one
of which must be (1) or (2):
1. Communication deficit (e.g., delayed acquisition of language; difficulty understand-
ing spoken language).
2. Impairment in social communication and interaction (e.g., overly friendly with strang-
ers; difficulty reading social cues; difficulty understanding social consequences).
3. Impairment in daily living skills (e.g., delayed toileting, feeding, or bathing; difficulty
managing daily schedule).
4. Impairment in motor skills (e.g., poor fine motor development; delayed attainment
of gross motor milestones or ongoing deficits in gross motor function; deficits in co-
ordination and balance).
E. Onset of the disorder (symptoms in Criteria B, C, and D) occurs in childhood.