60 Neurodevelopmental Disorders
2.Hyperactivity and impulsivity:  Six (or more) of the following symptoms have per-
sisted for at least 6 months to a degree that is inconsistent with developmental level
and that negatively impacts directly on social and academic/occupational activities:
Note:  The symptoms are not solely a manifestation of opposition al behavior, defi-
ance, hostility, or a failure to understand tasks or instructions. For older adolescents
and adults (age 17 and older), at least five symptoms are required.
a. Often fidgets with or taps hands or feet or squirms in seat.
b. Often leaves seat in situations when remaining seated is expected (e.g., leaves
his or her place in the classroom, in the office or other workplace, or in other
situations that require remaining in place).
c. Often runs about or climbs in situations where it is inappropriate. ( Note:  In ad-
olescents or adults, may be limited to feeling restless.)
d. Often unable to play or engage in leisure activities quietly.
e. Is often “on the go,” acting as if “driven by a motor” (e.g., is unable to be or un-
comfortable being still for extended time, as in restaurants, meetings; may be
experienced by others as being restless or difficult to keep up with).
f. Often talks excessively.
g. Often blurts out an answer before a question has been completed (e.g., com-
pletes people’s sentences; cannot wait for turn in conversation).
h. Often has difficulty waiting his or her turn (e.g., while waiting in line).
i. Often interrupts or intrudes on others (e.g., butts into conversations, games, or
activities; may start using other people’s things without asking or receiving per-