The study, conducted through the BBC website with over 40,000 participants, measured people's financial impulsivity by asking whether they would they prefer to receive £45 in three days or £70 in three months.
The survey asked a related series of questions about other behaviours. Nearly half of those who responded preferred the smaller-sooner sum of money, and these people were more likely to show a raft of other impulsive behaviours.
Dr Stian Reimers, ESRC Centre for Economic Learning and Social Evolution at UCL, says: "One of the big questions about people's financial planning is whether decisions to spend or save come from personal knowledge and experience of money matters or whether they reflect someone's personality more generally.
"Our research shows that people with an impulsive money-today attitude ignore the future in other ways. For example, they are more likely to smoke and more likely to be overweight, which may reflect a preference for immediate pleasure of nicotine and food over long-term good health. People who chose to take the smaller-sooner amount of money were also more likely to admit to having had an affair in recent years, suggesting another manifestation of desire for immediate gratification."
The study controlled for age, education and income, and found that those most likely to make impulsive financial choices were young, poorly educated, and on lower incomes.
Dr Reimers continues: "Given that those who decline £70 in three months in favour of £45 in three days are essentially turning down an interest rate that's hundreds of times what they'd get on the high street, this may begin to explain why some people are reluctant or unable to save money.
"Learning to make decisions that lead to long-term happiness, not just instantaneous gratification, could benefit us all. Simple techniques can help reduce impulsivity: like imagining how you'd feel about your decision in a year's time, or trying to avoid making decisions in the heat of the moment."
1. For more information or to set up an interview, please contact Dr Stian Reimers on +44 (0)20 7679 7570, mobile +44 (0)7967 974781, email email@example.com.
2. Alternatively, please contact Ruth Howells in the UCL Media Relations Office on tel: +44 (0)20 7679 9739, mobile: +44 (0)7990 675 947, out of hours +44 (0)7917 271 364, e-mail: firstname.lastname@example.org
3. 'Associations between a one-shot delay discounting measure and age, income, education and real-world impulsive behaviour' by Stian Reimers, Elizabeth Maylor, Neil Stewart and Nick Chater is published in the journal Personality and Individual Differences, doi:10.1016/j.paid.2009.07.026. Journalists can obtain copies of the paper by contacting the UCL Media Relations Office.
4. The study was carried out via the BBC website, which collected 42,863 participants' responses to a survey. It formed part of the SexID test (www.bbc.co.uk/sexid), a collaborative web-based project examining many aspects of cognition and behaviour.
5. The study was run by UCL and the University of Warwick.
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