Genetic factors in addiction

• What did David Goldman et Al (2005) conclude about the heritability of addictions?

  • addictions are moderately to highly heritable, with heritability ranging from +.39 for hallucinogens to +.72 for cocaine
• What does the research suggest about the relationship between genetic similarity and addictive behaviour ?

  • people who are more closely related are more likely to share addictive behaviours, supporting the role of genetics