Now controversially spans all sorts of behaviours

“ Their field of 
vision literally 
narrows until 
their addiction 
is all they
can see”
control group. Other labs have since 
found similar results. 
Sam says he is an addict, and pornography 
is his drug (see “Addicted to pornography”, 
page 44). And it turns out that substance 
addictions and would-be behavioural 
addictions don’t just feel similar, they 
look similar in the brain too. 
Griffiths believes that behavioural 
addictions don’t just include gambling, sex and 
gaming. “Any behaviour could be. I don’t care 
what the behaviour is,” he says. The good news 
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