調查方法 Survey MethodBack
In the past many years, POP has been conducting popularity ratings for a variety of political figures and organizations, including members of the Top 10 Legislative Councillors. The research design of this exercise is explained as follows:
Since July 2017, the survey on ratings of top 10 Legislative Councillors is conducted once every four months, in two different phases. In the first stage, respondents were requested to nominate, unprompted, all legislators that they can think of.
POP would then select from this list of unprompted nominees the 12 most frequently cited names for the next stage survey.
During the second stage survey, respondents would be asked to rate each of the selected legislators using a 0-100 scale. 0 indicates absolutely no support, 100 indicates absolute support, and 50 means half-half. After calculation, the least well-known figures would be dropped. Only the ten most well-known legislators remain. Finally, any figure which fails to reach the 50% benchmark recognition rate would also be dropped (or retained only for reference). The list will then be sorted according to support ratings.
Using this method, the POP Team is able to screen out the most popular legislators both in terms of popular recognition and support. Those who failed to reach the top must have failed in either or both aspects.
All stage one naming surveys and stage two rating surveys mentioned are telephone surveys conducted by interviewers under close supervision.
Target population of these surveys are Cantonese speakers in Hong Kong of age 18 or above.
Starting from mid-January 2014, 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 dialing records to produce the final sample.
From July 2017, apart from sampling landline numbers to conduct opinion surveys, POP has also added mobile numbers to the sampling frame. After three months of testing, in October 2017, POP formalized the use of mixed samples as its standard for regular opinion surveys using a landline and mobile sample ratio of 4 to 1. Starting from April 2018, POP further increased the proportion of mobile sample, which the landline and mobile sample ratio became 2 to 1. The figures have already incorporated landline and mobile samples.
For landline samples, upon successful contact being made with a target household, one member of the household is selected among those present using the "next birthday" rule.