Research assesses gambling harms

GambleAware has today published commissioned research, authored by two professors at the London School of Economics, investigating how methodological differences between surveys affect the accuracy of estimates of gambling harms.

The research was commissioned following a 2019 YouGov study which found substantially higher rates of gambling harms across Great Britain than had previously been reported by the 2016 and 2018 Health Surveys for England.

The research was commissioned to identify the best way to determine gambling participation and prevalence of gambling harms in Great Britain and to develop a better understanding of how methodological factors might account for the differences between the results of the YouGov study and the Health Survey for England’s results. 

The research reviewed eight different surveys into gambling participation and prevalence of gambling harms to identify differences in results and what causes them. The key finding is that surveys using predominantly, or exclusively online self-completion responses produce consistently higher estimates of gambling harm compared to surveys which use paper self-completion techniques as part of a face-to-face interview.

The primary cause of this discrepancy was found to be selection bias in online surveys. Selection bias in this instance refers to the fact that online surveys skew towards people who are comfortable using online technologies and who use the internet regularly. These people are also more likely to be online and frequent gamblers, meaning online surveys tend to over-estimate gambling harm.