Email, voicemail, text — no response. What gives?

ADVANCE FOR USE TUESDAY, FEB. 26, 2013 AND THEREAFTER - In this Thursday, Feb. 7, 2013 photo, Mahrinah von Schlegel, managing director of Cibola, an incubator for tech entrepreneurs that will open this spring, sits at her computer at her office in Chicago. Technology is supposed to make us easier to reach, and often does.  But the same modes of communication that have hooked us on the instant reply also can leave us feeling forgotten. These days, no response can mean a lot of things. Maybe some people don't see messages because they prefer email and you like Twitter. Maybe we're just plain overwhelmed, and can't keep up with the constant barrage of communication. (AP Photo/Martha Irvine) ORG XMIT: NY631