[caption id="attachment_99107" align="alignleft" width="215" caption="Messages should be capable of being conveyed through digital signage in just seven seconds or less, or else students will tune them out."][/caption]

If a digital sign can’t convey a message in seven seconds, the technology runs the risk of blending into the background, one expert says—and during campus emergencies, that could prove dangerous.

Schools and departments on college campuses are often competing with each other to see which building touts the most advanced digital signage, but in the arms race for fancy graphics on impressive screens, the potential for...

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