調查方法 Survey Method返回


調查方法

 所有社會指標調查皆為電話問卷調查，由嚴格督導下的訪員進行訪問。
 

  所有調查都是在嚴格督導下由訪員親身進行電話訪問，對象皆為十八歲或以上之操粵語的香港市民。
 

  各次調查的成功樣本數目都在500以上。2000年5月份起，成功樣本數目更增加至1,000以上，兼且根據香港人口的年齡性別分佈加權調整。自2011年2月開始，各題目只涉及次樣本，次樣本數目控制在500以上。2014年起，民研計劃把以往按照年齡及性別分佈進行的簡單加權方法，改良成為按照年齡、性別及教育程度（最高就讀程度）分佈的「反覆多重加權」方法調整數據。2017年7月，民研計劃再改良加權方法，除了考慮年齡、性別和教育程度外，加入經濟活動組別予以調整。
 

 2014年1月中起，電話號碼抽樣方法是先從通訊事務管理局之香港電訊服務號碼計劃獲取已分配予電訊商的電話字頭，然後以隨機方式從中產生號碼。最後，按照電腦撥打及過往調查記錄，剔除無效號碼成為最終樣本。
 

 2014年1月中或之前，電話號碼抽樣方法是從住宅電話簿中首先以隨機方法抽取「種籽」號碼，再以加一減一加二減二的方法產生另一組號碼，然後在混合後再過濾重覆號碼，再以隨機排列方式排次成為最後樣本。
 

 抽取住戶成員的方法是由訪員在成功接觸目標住戶後，用「即將出生日期」的方法由當時在家的成員抽取其中一人進行訪問。
 

 2018年7月起，五項核心社會指標維持每半年發放一次，而七項非核心社會指標、十項自由次指標、兩項法治次指標，以及終審法院首席法官評分則改為每年發放一次。



Survey Method
 

All surveys on social indicators are telephone surveys conducted by interviewers under close supervision.

 
 

All these surveys are conducted by telephone interviewers under close supervision. Target population of these surveys are Cantonese speakers in Hong Kong of age 18 or above.

 
 

The sample size of all these surveys is controlled at more than 500 successful cases each time. Since May 2000, it has been increased to more than 1000, and weighted according to gender-age distribution of the Hong Kong population. Starting from February 2011, all questions of sub-indicators only use sub-samples of the tracking surveys concerned, and the sub-sample size is controlled at more than 500 cases. In 2014, POP enhanced the previous simple weighting method based on age and gender distribution to “rim weighting” based on age, gender and education (highest level attended) distribution. In July 2017, POP further enhanced the weighting method. Apart from age, gender and education, economic activity group is now also taken into account when adjusting data.

 
 

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.

 
 

Before mid-January 2014, 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.

 
 

From July 2018, 5 core indicators continue to be released once every half-year, while 7 non-core indicators, 10 freedom sub-indicators, 2 rule of law sub-indicators, and the rating of Chief Justice have been changed to be released once every year.