There are many other factors in developing an addiction, such as genetics, social influence, family behavior, emotional stamina, and availability of the substance. Impairment of the frontal lobe function compounds all of those other risk factors. Though there is no definitive prediction of which individual may go on to develop an addiction, science has shown that any introduction of a substance with an addiction potential, can possibly lead to addiction.
In addition, the evidence shows that the earlier a person is introduced to potentially addictive substances, the more likely that person is to eventually develop an addiction. It is a very rare occurrence for an individual, whose first use occurred after full brain maturity, to develop an addiction to a substance.