Mindfulness Therapy on Disrupted Sleep in Bipolar Disorder

Inclusion Criteria: * Men and women age 18-65 * DSM-IV diagnosis of bipolar I or II disorder * HAM-D-17 score \< 17 (i.e. low or no depressive symptoms) * YMRS score \< 8 (i.e. no or low manic symptoms) * Optimized, stable maintenance pharmacotherapy at maximum tolerated dosages in accordance with the revised Texas Implementation of Medication Algorithm * DSM-IV insomnia A and B criteria are met (i.e. difficulty initiating or maintaining sleep, for at least 1 month) as operationally defined by: 1. Insomnia Severity Index score of \> 15 (moderate clinical insomnia) 2. M1 derived average actigraphic total sleep time \< 6 hours, and \< 40% average total sleep time in high frequency coupling, as measured with the M1 device over 5 days pre-randomization, corresponding to \< 1SD below the mean of the M1 normative comparison sample of healthy control participants. Exclusion Criteria: * DSM-IV bipolar I disorder subtype rapid cycling * DSM-IV manic or mixed episode in the past 2 months * DSM-IV major depressive episode in the past 2 months * Psychotropic medication not in accordance with the revised Texas Implementation of Medication Algorithm * Pregnancy * Medical illness or non-psychiatric medical treatment that is the likely cause of the sleep disturbance or interferes with study participation * Neurologic disorder, previous ECT, or history of head trauma (i.e. known structural brain lesion) * Current or past history of selected DSM-IV Axis I disorders other than bipolar disorder including: organic mental disorder, substance abuse within the past 12 months and/or history of substance abuse for \> 1 year; past or current substance dependence (including alcohol), schizophrenia, delusional disorder, psychotic disorders not otherwise specified * Axis I disorder that needs to be the primary focus of treatment (e.g. current DSM-IV anxiety disorder that disrupts sleep) * Sleep apnea, restless leg syndrome, or narcolepsy * Concurrent psychotherapy to BS or SP.