Gallup’s Positive and Negative Experience Indexes
The results are based on nationally representative, probability-based samples among the adult population, aged 15 and older, in each country. In most years, except for 2020 and 2021, the Positive Experience Index and Negative Experience Index are calculated from surveys in more than 140 countries and areas. In 2020 and 2021, scores are based on surveys in 116 and 122 countries, respectively.
Results are based on telephone or face-to-face surveys of approximately 1,000 or more respondents in each country. Gallup typically conducts more than 3,000 interviews in China and India and 2,000 in the Russian Federation.
For results based on the total sample of national adults in 2021, the margin of sampling error ranges between ±2.0 and ±5.5 percentage points at the 95% confidence level. The margin of error reflects the influence of data weighting. In addition to sampling error, question wording and practical difficulties in conducting surveys can introduce error or bias into the findings of public opinion polls.