Of some 150,000 people interviewed in over 140 countries, a third said they suffered stress, while at least one in five experienced sadness or anger. The annual Gallup Global Emotions Report asked people about their positive and negative experiences.
The most negative country was Chad, followed by Niger. The most positive country was Paraguay, the report said. Researchers focused on the experiences of participants the day before the survey took place.
Interviewees were asked questions such as "did you smile or laugh a lot yesterday?" and "were you treated with respect?" in a bid to gain an insight into people's daily experiences.
Around 71% of people said they experienced a considerable amount of enjoyment the day before the survey.
The poll found that levels of stress were at a new high, while levels of worry and sadness also increased. Some 39% of those polled said they had been worried the day before the survey, and 35% were stressed.