Older adults are more willing to make an effort to help others than younger adults, according to new research from the University of Birmingham.
The study, led by researchers in the University's School of Psychology, is the first to show how effortful 'prosocial' behaviour - intended to benefit others - changes as people get older. In particular, it focused on people's willingness to exert physical effort, rather than to give money or time, since attitudes to both these are known to change with age. The research results are published in Psychological Science.
In the study, the research team tested a group of 95 adults aged between 18 and 36, and a group of 92 adults aged 55-85. Each participant made 150 choices about whether or not to grip a handheld dynamometer - a device for measuring grip strength or force,- with 6 different levels of how hard they had to grip. Before the experiment, the researchers measured each person's maximum grip strength, so they could make sure that the effort people had to put in was the same for everyone, and not affected by how strong people were.
For each decision, participants were told whether they would be working to gain money for themselves, or for another person. First they were asked to decide whether they would be willing to put in effort to gain money or not. If they accepted the offer they had to grip hard enough to get the money.
The results showed that when the task was easy, young and older adults were equally willing to work for others, but, when the task was more effortful older adults were more willing to work to help others. In contrast, younger adults were more selfish and were much more likely to put in higher levels of effort to benefit themselves.
The team also noticed a correlation between the willingness to put effort into tasks that benefited other people and positive feelings towards other people. But it was only in younger people that this 'warm glow' feeling also related to them completing tasks for themselves.
Senior author, Dr Matthew Apps, explained: "Past research had suggested that older adults were more prosocial than young adults because they donate more money to charity. But, the amount of money or time people have available changes a lot as we get older, as such older adults might just appear more prosocial. We wanted to focus simply on people's willingness to exert effort on behalf of someone else, as this shouldn't depend on your wealth or the time you have available. Our results showed very clearly that participants in our older age group were more likely to work harder for others, even though they would gain no significant financial reward for themselves."
Lead author Patricia Lockwood added: "A lot of research has focused on the negative changes that happen as people get older. We show that there are positive benefits to getting older too, in particular older adults seem to be more willing to put in effort to help others. These 'prosocial behaviours' are really important for social cohesion. Understanding how prosocial behaviour changes as people get older is critical as we predict the impact of an ageing society."
The research was funded by the Biotechnology and Biological Sciences Research Council and the Medical Research Council, both part of UK Research and Innovation.