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Why near-misses are just as good as winning for gamblers

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Washington | February 26, 2014 12:01:13 AM IST
 
A new study by the University of Exeter and Swansea University has pinpointed the changes in the brain that lead gamblers to react in the same way to near-misses as they do to winning.

The research shows that near-misses are underpinned by increases in the brain's electrical activity, particularly in the theta frequency range - known to be involved in processing win and loss outcomes.

They found that these increases in theta are linked to both how severe someone's gambling history is and how susceptible they might be to developing a future gambling problem.

Popular slot machine games, as found in many high street betting shops, have subtle ways of telling players not just whether they have won or lost, but also whether they 'almost won'.

One of the best understood is the so-called near-miss effect, when a losing slot machine display physically resembles a win display (such as two out of three matching symbols on the payline).

Near-misses are actually losses, but previous research has shown that they may promote continued gambling because the brain interprets them as being similar to wins.

The new research, led by Dr Natalia Lawrence of the University of Exeter and Dr Simon Dymond at Swansea University, shows that in gamblers, near-misses produce some similar increases in brain theta (4-7 Hertz) activity to wins.

"Our findings show for the first time that gamblers have an exaggerated theta response to almost winning in brain regions related to reward processing, which could contribute to them continuing to gamble despite their losses. If replicated, these brain activity changes could help us identify those vulnerable to gambling addiction and might be a useful measure of the effectiveness of therapy for gambling related problems," Dr Lawrence, of Psychology, said.

This study is published in the leading neuroscience journal, NeuroImage. (ANI)

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