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Attention Deficit Disorder (ADD/ADHD)
Behaviors
Figure 1: Reward deficiency syndrome comprises a spectrum of
impulsive, compulsive, addictive and personality disorders that are based on a
common genetic deficiency in the dopamine D2 receptor, according to the
authors. A predictive model based on Bayes's Theorem suggests that an
individual who carries the A1 allele for the dopamine D2 receptor has a 74
percent chance of developing one of the disorders of the reward deficiency
syndrome (Blum et al. 1996b). The type of disorder that is
manifested by any particular individual is determined by other genetic and
environmental factors, which are not yet fully understood.
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