• Title/Summary/Keyword: 전화조사

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전화조사에 있어서 이동전화의 대체 가능성 모색

  • 이기성;홍기학;손창균
    • Proceedings of the Korean Association for Survey Research Conference
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    • pp.213-227
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    • 2000
  • 이동전화의 급격한 보급으로 인하여 기존의 전화 포괄성이 변화하고 있으며, 이러한 변화의 추세를 감안하여 전화조사에서 이동전화 프레임을 함께 고려함이 바람직할 것이다. 이러한 측면에서 국내의 전화 포괄성과 이동전화 보급률을 고찰하고, 전화조사의 부분적인 대안으로 이동전화의 대체 가능성을 모색하였다.

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Random Digit Dialing Telephone Survey and Major Findings (RDD 전화조사와 주요결과)

  • Kang, H.C.;Han, S.T.;Kim, J.Y.;Jung, Y.C.;Huh, M.H.
    • Survey Research
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    • v.9 no.1
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    • pp.1-22
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    • 2008
  • Telephone directories ille still being used as the sampling frame in almost all fixed-line telephone surveys in Korea, causing potentially serious coverage error. RDD (random digit dialing) sampling is an obvious alternative to solve the problem. The aim of this paper is twofold: 1) proposal of RDD methodology suitable to the telephone system of Korea and 2) the identification of socio-demographic and socio-psychological differences between listed-number and unlisted-number respondents. Major findings of RDD telephone survey conducted experimental]y are as follows. 1) Population coverage by telephone directories is 60% or less. 2) Unlisted-number households have statistically larger income compared to listed-number households. 3) Unlisted-number households have smaller family size compared to listed-number households. 4) Unlisted-number respondents are more sensitive about confidentiality, leaks, 5) Unlisted-number respondents are more liberal compared to unlisted-number respondents. These facts suggest that directory-based telephone surveys tend to be biased in socio-economic aspects.

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다중 추출틀 조사기법을 적용한 인터넷 조사와 전화조사의 사례연구

  • 김영권;이계오;김주성;박무익
    • Proceedings of the Korean Association for Survey Research Conference
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    • pp.141-155
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    • 2000
  • 현재 국내의 여론조사에서는 전화조사가 주로 이용되고 있으며, 최근 들어 인터넷조사를 활용하는 방법들이 연구되고 있다. 그러나 인테넷조사의 경우 모집단 구조가 편향된 특성을 가지고 있으므로 이에 대한 보완 수정없이 결과의 직접적인 이용은 많은 비표본오차를 발생시킬 수 있다. 그러므로 본 연구에서는 사회여론조사를 수행함에 있어서 편향모집단에서의 인터넷조사로부터의 추정값과 전화조사를 통한 추정값의 적절한 결합추정방법을 제안하고, 지난 4.13 총선의 조사자료를 이용하여 이들 결합추정의 효율성을 검토하였다.

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How Accurate are the Telephone Polls in Korea? (전화여론조사의 예측정확도 분석)

  • Cho, Sung-Kyum
    • Survey Research
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    • v.10 no.1
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    • pp.57-72
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    • 2009
  • In Korea, telephone surveys have been used in election forecasting since 1992. In some elections, predictions were excellent, but in some elections, the predictions based on telephone surveys were not good. So, exit polls have been used along with the telephone surveys in predicting election outcomes since 2001 by the major broadcasting networks. Though telephone surveys, in general, have been less accurate than exit polls in election forecasting from 2000 to 2003, they were more accurate in the 2004 General Election than the exit polls. All predictions on the winners by the telephone surveys turned out to be accurate. But such success has not persisted. In the 2008 General Election, the telephone surveys was less accurate than the exit polls and actually its accuracy fell clown to the level of the 2000 General Election. This paper tried to find out. the factors responsible for the fluctuation of the accuracy of telephone polls.

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RDD Sample versus Directory - Based Sample for Telephone Surveys: The Case of 2007 Presidential Election Forecasting in Korea (RDD 표본 대 전화번호부 표본: 2007년 대통령 선거 예측사례)

  • Huh, Myung-Hoe;Kim, Young-Won
    • Survey Research
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    • v.9 no.3
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    • pp.55-69
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    • 2008
  • In most telephone surveys in Korea, telephone numbers are selected from the directories. Inevitably, such samples may lack representativeness due to poor coverage rate. To resolve the problem, Kang et al.(2008) implemented RDD(random digit dialing) method for nationwide sampling in Korea. The aim of this study is to compare an RDD sample with a traditional telephone quota sample that were collected independently by two survey institutes commissioned by the KBS-MBC consortium for the 2007 Presidential Election of Korea.

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The Major Findings of the Telephone Survey by Random Digit Dialing and Time-Balanced Quota Sampling (임의번호걸기와 시간균형할당표집에 의한 전화조사의 주요결과)

  • Huh, M.H.;Han, S.T.;Kim, J.Y.;Sung, E.H.;Kang, H.
    • Survey Research
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    • v.12 no.2
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    • pp.77-88
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    • 2011
  • Korean telephone surveys have been based on telephone directory and thus criticized for considerable under-coverage. Now, Korean survey institutions progress to random digit dialing (RDD) very actively. But still most surveys are administered by quota sampling, prone to assign heavier weights to social classes with more hours staying indoor. As a practical remedy, time-balanced quota sampling scheme was proposed by Huh and Hwang (2006). This study compares two telephone surveys on TV audience environment in Korea: RDD with conventional quota sampling versus RDD with time-balanced quota sampling.

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Applying Propensity Score Adjustment on Election Web Surveys (인터넷 선거조사에서 성향가중모형 적용사례)

  • Lee, Kay-O;Jang, Deok-Hyun
    • Survey Research
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    • v.10 no.3
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    • pp.21-36
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    • 2009
  • This study suggests the applicability of web surveys regarding elections in order to contact a great number of young people. The propensity weighting model was estimated using the demographic variables and the covariate variables collected during the 2007 presidential election surveys. In order to adjust the internet survey to the telephone survey, we used the propensity score method. Propensity score weighting made the internet survey results closer to the telephone survey results. This shows that an internet survey with propensity weighting model is a potential alternative survey method in the prediction of elections.

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Effects of Call-back Rules and Random Selection of Respondents: Statistical Re-analysis of R&R’s Ulsan Survey Data. (전화조사에서 재통화 규칙준수와 응답자 임의선택의 영향 - R&R 울산 사례의 통계적 재분석 -)

  • 허명회;임여주;노규형
    • The Korean Journal of Applied Statistics
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    • v.16 no.2
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    • pp.247-259
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    • 2003
  • In Korea, quota sampling is mainly adopted in telephone surveys, instead of random sampling which requires call-back procedure and random selection of respondent within households. The contact mode based on the se $x^{*}$age quotas is economically more advantageous and less time-consuming. However, it lacks theoretical ground for valid statistical inference, so that it is hardly accepted in academic circles despite of widely spread practice. Subsequently, survey theoreticians argued that random sampling-based telephone surveys should be tried. In response, Research & Research (R&R), a private research company in Seoul, executed atelephone survey by random sampling mode for the prediction of 2002 Ulsan City Mayor Election. The aim of this case study is to find out various effects of the call-back rule with random selection of respondents by statistically re-analyzing R&R’s Ulsan Survey Data.s by statistically re-analyzing R&R’s Ulsan Survey Data.

Application of Random Sampling Procedures in a Telephone Survey (전화조사 상황에서 무선표집절차의 적용결과: 단계별 응답특성을 중심으로)

  • Cho, Sung-Kyum;Cho, Eun-Hee
    • Survey Research
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    • v.11 no.2
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    • pp.141-160
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    • 2010
  • This study aims to analyze the usefulness of the survey procedures developed for telephone surveys using a random sampling method. We conducted a telephone survey of residents in a local area from October 26 to November18,2009. We applied random sampling procedures with five call-backs. Particular attention was given to the conversion of refusals. Out of 2,454 phone numbers, we succeeded in getting responses from 637 numbers. The absence of residents was the primary cause of non-response. We received responses from 45.7% of those with whom we successfully made contact. One finding of this study is that, contrary to our initial expectations, call-backs do not significantly increase the percentage of responses from young people. Also we cannot find any significant differences in responses to various questions between the responses received from the first round of calls and later responses. However, these results are not conclusive; another survey may produce different results. Therefore, further research is needed.

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Time-Balanced Quota Sampling for Telephone Survey (전화조사를 위한 시간균형할당표본추출)

  • Huh, Myung-Hoe;Hwang, Jin-Mo
    • Survey Research
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    • v.7 no.2
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    • pp.39-52
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    • 2006
  • Most of Korean survey institutions adopt quota sampling for telephone surveys based on region, gender and age-band. In weekdays, it is well blown that there exist substantial differences in day time in-house rate by individual's socio-demographic attributes. So, quota sampling may induce systematic respondent selection bias. To solve the problem, we propose "time-balanced quota sampling" in which interviewer's call time-band is added as an quota variable. Furthermore, we propose "time-balanced quasi-quota sampling" which is derived by partially relaxing evening time quotas in time-balanced quota sampling. We compare the conventional and the newly proposed quota sampling schemes by drawing Monte Carlo samples from the hypothetical population for which the Korea 2004 time use survey data is assumed.

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