All surveys on the overall performance of members of the Second HKSAR Legislative Council are conducted by telephone interviewers under close supervision.
Such surveys began in November 2000 (when the session of the Second HKSAR Legislative Council began) and are conducted at least once every two month.
Target population of these surveys are Cantonese speakers in Hong Kong of age 18 or above.
Telephone numbers are first selected randomly from telephone directories as seed numbers. Another set of numbers is then generated by using the plus/minus one/two method. Duplicate numbers are then screened out, and the remaining numbers mixed in a random order to become the final sample.
Upon successful contact being made with a target household, one member of the household is selected among those present using the "next birthday" rule.