Can happiness be measured or is it too elusive and complex to measure? ‘Measuring happiness’ looks at the issues associated with trying to measure happiness. Measures of happiness can be accurate. Measuring happiness is no more mysterious or fraught than measuring depression and anxiety. When reading about scientific studies of happiness, it is advisable to consider three caveats: what is the study measuring? Do the groups being compared tend to answer happiness questions differently? If the study claims that some group of people is ‘happy’, what is the evidence for this? Measures of happiness between groups tell us a lot about relative happiness levels but they can't tell us much about how many people actually are happy.