When Lucy Kaplansky was 18 years old, she shocked her neighbors in the Hyde Park area near the University of Chicago when, instead of going to college, she went to New York City with her boyfriend to become a folksinger. Fifteen years later, having become a clinical psychologist as well as a sought-after duet and harmony singer, she made another surprising decision: she gave up her private practice and her position at a New York hospital to pursue a full-time singing career.