Definitions for bystander effect
That someone is less likely to help another if other potential helpers are present than otherwise.
U.S. National Library of Medicine
The result of a positive or negative response (to drugs, for example) in one cell being passed onto other cells via the GAP JUNCTIONS or the intracellular milieu.
Use the citation below to add this definition to your bibliography:
"bystander effect." Definitions.net. STANDS4 LLC, 2013. Web. 19 Jun 2013. <http://www.definitions.net/definition/bystander effect>.