Risk Factors - Genetic Influence

Question 1

Comings et al (1996)

Answer 1

Pathological gamblers may inherit a fault A1 DRD2 gene. This reduces dopamine receptors in our pleasure centres within the limbic system. Individuals with this variant are less sensitive to rewards and may seek out extra stimulating activities like gambling to compensate

Question 2

Blum et al (1996)

Answer 2

Reward deficiency syndrome outlines how these genetic vulnerabilities can be seen in many compulsive disorders. 69% of a sample of alcohol addicts and 51% of cocaine addicts had this genetic variant

Question 3

Shields et al (1960)

Answer 3

Examined the concordance rate between 42 twin pairs that were reared apart. 33 were concordant and both smoked