Survey methodBack

Same as the other telephone interviews conducted by the POP Team, all interviews in this rolling survey were conducted by telephone interviewers under close supervision. The target population was Cantonese-speaking registered voters living in Hong Kong aged 18 or above. Telephone numbers are randomly generated using known prefixes assigned to telecommunication services providers under the Numbering Plan provided by the Office of the Communications Authority (OFCA). Invalid numbers are then eliminated according to computer and manual dialling records to produce the final sample. When telephone contact was successfully established with a target household, one of the registered voters available was selected using the "next birthday rule", which selected the person who had his/her birthday next from all those present.

The research instrument used in this study was designed entirely by the POP team, while the lists of candidates for each constituency were based on the latest information announced by the Registration and Electoral Office. Fieldwork operations and data analysis were conducted independently by the POP team, without interference from any outside party.

To ensure representativeness of the findings, the raw data collected have been rim-weighted according to the age-gender distributions of registered voters in each geographic constituency based on the 2016 register of electors provided by the Government.