Table 1.

Domains	Sample item	Cronbach’s alpha	Clusters and domains
Body movements	Makes large complex movements of her/his body, such as spinning, twirling or repeatedly bouncing up and down.	0.706	Movement
Object interaction	Examines or manipulates some novel or unfamiliar objects repeatedly	0.706
Activity/routines	Never plays with one object or engages in one activity for very long	0.652
Emotional Function	Expresses emotions inappropriate to the situation	0.439	Social/emotional function
Eye contact	Makes efforts to avoid other people’s gaze (keeps head down, looks away, or turns away)	0.618
Social interaction	Participates in group activities	0.501
Emotional engagement	Doesn’t seem to recognize or respond to other people’s emotion	0.706
Comfort seeking	Actively seeks comfort from familiar people	0.471
Safety consciousness	Is less aware of danger around the house (e.g., would touch hot oven), on the street or in the playground than other children his/her age.	0.722	Lack of fear
Fearfulness	Is less fearful of new, strange or scary things than other children his/her age	0.743
Attention	Is easily distracted	0.806	Executive function
Self control/compliance	Is impulsive; can’t stop self	0.708
Orality	Puts everything in her/his mouth; eats inedible things	0.750
Mood/Anger/Aggression	Mood is irritable and cranky	0.832
Self-gratification	Rubs his/her genitals with hands, inside or outside clothing	0.396