When you psychologically dependent on alcohol the person is mentally dependent on the substance, and can alter behavior or mood. When a person is physiological dependence on alcohol, the individual has an increased tolerance towards alcohol.
. It is possible for the person to have addiction symptoms that are predominately psychological in nature. A good example of this would be gambling or internet addiction. This means that they feel the need to engage in the behavior in order to cope or because they have a deep urge to do so. When it comes to alcohol and drugs the individual will usually develop both a physical and psychological addiction. The way this usually happens is that the person develops a psychological dependence first of all, and this drives them to keep using the drugs until they become physically addiction as well.
