Inclusion Criteria:  Male or Female, at least 18 years of age Cognitive status and English language skills sufficient to complete all study related assessment materials Presence of OAB (score of ≥4 on the OAB-V3 awareness tool) Urgency predominant urinary incontinence, if incontinence present  Specific entry criteria for control subjects  Subject to the same inclusion/exclusion criteria, plus: Absence of OAB (score of ≤3 on the OAB-V3) No urgency-related urinary incontinence  Exclusion Criteria:  Post void residual urine >150ml Need for catheterization, indwelling or intermittent Men: uroflow < 10 ml per sec Current symptomatic urinary tract infection that has not resolved Comorbid neurological conditions, including spinal cord injury, systemic neurologic illnesses (i.e. multiple sclerosis, Parkinson's disease) or central nervous system disease (i.e. brain tumor, stroke) thought to impact bladder function Iatrogenic (i.e. post-surgical) or non-iatrogenic obstructive conditions (i.e. pelvic organ prolapse greater than stage 2, urethral stricture, benign prostatic enlargement) Prior pelvic irradiation Current or prior bladder malignancy Confirmed diagnosis of Interstitial Cystitis Hematuria without a clinically appropriate evaluation