psteve, very true, you make a good point about addiction being a mental behaviour rather than a direct response from the drug.

As pointed out by yourself, it is a fairly indirect response, as such if behaviourisms are addictive & habbit forming you can concede to the fact that psychoactive substances act as triggers - such triggers which can lead to a psychological addiction as a behavioural response which is in fact rooted in psychology rather than the drug itself. Peoples neuro-chemistry differs, and that is why I said some people. What I should have probably said is a minority. These cases do exist however, and I can provide whitepapers and research at some point if anyone would like

It was a mistake to use the words psychologically addictive, as it compounded the confusion further. What I meant was "mentally addictive" which by medical definition is a psychological as well as physical (chemical) process. It seems we are caught on definition here and the differentiation between mental addiction and physical addiction seems almost meaningless.

In fact, mental addiction is a very real thing, and there are likely psychological reasons for that in any case. Upon definition it can be seen discredable but in reality cases exist and will continue to exist.

Research does suggest though that personality disorders create a likelyhood of what I refered to as both "mental addiction" and "psychological addiction". Although the two should not be confused, I would argue they are causality and effect and there has not been enough research to determine exactly how they interact yet. Just that evidence suggests mental addiction is possible - if not by definition - by causality. The one thing that is clear. These cases are rare, but not rare enough to be outcast and ignored.

Peace,
Denial