This study is a small scale pilot study which will be used to support a larger trial. The major aims of the larger study are to determine the extent to which aspects of circadian rhythmicity, including, sleep/wake rhythms, daily social routines (i.e., social rhythms), circadian type (morningness/eveningness), endogenous circadian rhythms and polymorphisms associated with altered circadian function in specific genes (namely, CLOCK, Period 2 and Period 3) moderate treatment response in bipolar disorder.