How were the surveys administered?The vast majority of all the interviews were administered by lay interviewers using computer-assisted personal (face-to-face) interviews (CAPI). All interviews started as CAPI interviews. Some interviews were administered by phone if an interviewer was not available locally who spoke the respondent's preferred language or if the respondent preferred to be interviewed over the phone. Some interviews were also very long and had to be completed in more than one session, with later sessions more likely to be conducted over the phone. For more detailed information, please see the Survey Management section or Data Collection section of About CPES.