The researchers for PSB Insights, a global polling company, were nationals of each country where the survey took place and went door-to-door for in-depth, face-to-face interviews.
Abaphandi be-PSB Insights, inkampani yokuvota yehlabathi, apho abemi belizwe ngalinye kwiindawo apho uphando luqhutywe khona kwaye kungenwa kwindlu nganye kusenziwa udliwano-ndlebe olunzulu, ubuso ngobuso.