As before, many questions have been submitted so it is always preferable to insert your topic in the search box. If you entered 'addictive' into the search engine it would have brought up several references. One such reference is asked by beeper_spryte in IQ, addiction, human behaviour
Rank: Robert KochQuestion ID: 2648credits: 25closed on: 04/05/2006 05:39pm
If you look at the responses given it may well answer your question. Hope that helps.