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. Author manuscript; available in PMC: 2009 Jun 17.
Published in final edited form as: Addict Behav. 2007 Apr 14;32(12):3054–3059. doi: 10.1016/j.addbeh.2007.04.008

Figure 1.

Figure 1

Smokers' Influence If the focal student is chosen by four other students as a friend, and one of those students are smokers and three are not, then this student's proportion in-degree from smokers (smokers' influence) is .25.