Actigraphic measurements were made utilizing a watch-like actigraphic device with an 11 day baseline actigraphic measurement period and continued measurements that included the initiation of a Once-Daily, Bedtime (q.h.s.) pharmacological intervention for 6 days, followed by a planned adjustment to Twice a Day (b.i.d.) dosing that was measured for an additional 4 days. Repeated actigraphic studies were subsequently conducted after 22 months of risperidone treatment and were collected along with the repeated observational and psychometric data.