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National Postsecondary Student Aid Study 1999-2000 (NPSAS:2000), CATI Nonresponse Bias Analysis Report. Working Paper Series.

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Title: National Postsecondary Student Aid Study 1999-2000 (NPSAS:2000), CATI Nonresponse Bias Analysis Report. Working Paper Series.
Language: English
Authors: Siegel, Peter H., Whitmore, Roy W., Johnson, Ruby E., Yu, Di, National Center for Education Statistics (ED), Washington, DC.
Availability: For full text: http://www.nces.ed.gov/pubsearch/.
Peer Reviewed: N
Page Count: 59
Publication Date: 2002
Document Type: Reports - Evaluative
Descriptors: Data Collection, Higher Education, National Surveys, Responses, Statistical Bias, Telephone Surveys
Abstract: Unit nonresponse causes bias in survey estimates when the outcomes of respondents and nonrespondents are different. In the National Postsecondary Student Aid Study of 1999-2000 (NPSAS:2000) there were three levels of response, one of which was computer-assisted telephone interview (CATI) response. Because the response rates were less than 70% in some sectors or overall, an analysis was conducted to determine if CATI estimates were significantly biased due to CATI nonresponse. Through other databases, considerable information was available about CATI nonrespondents to this survey, and these data were used to analyze and reduce bias. The distribution of several variables using the design-based, adjusted weights for study respondents were found to be biased before CATI nonresponse adjustments. The CATI nonresponse and poststratification procedures, however, reduced the bias for these variables, and when the weighting was completed, no variables available for most respondent and nonrespondents had significant bias for all students combined. The bias was significantly reduced, and the remaining bias is small. Section 2 discusses the characterization of the bias before CATI nonresponse adjustment, and section 3 describes the weight adjustments used to reduce bias. Section 4 describes the bias for CATI variables, and section 5 discusses the bias remaining after weight adjustments. Section 6 discusses the overall predictive ability of the three nonresponse models, and section 7 presents conclusions. (SLD)
Entry Date: 2003
Accession Number: ED469645
Database: ERIC
FullText Text:
  Availability: 0
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  Data: National Postsecondary Student Aid Study 1999-2000 (NPSAS:2000), CATI Nonresponse Bias Analysis Report. Working Paper Series.
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  Data: <searchLink fieldCode="AR" term="%22Siegel%2C+Peter+H%2E%22">Siegel, Peter H.</searchLink><br /><searchLink fieldCode="AR" term="%22Whitmore%2C+Roy+W%2E%22">Whitmore, Roy W.</searchLink><br /><searchLink fieldCode="AR" term="%22Johnson%2C+Ruby+E%2E%22">Johnson, Ruby E.</searchLink><br /><searchLink fieldCode="AR" term="%22Yu%2C+Di%22">Yu, Di</searchLink><br /><searchLink fieldCode="AR" term="%22National+Center+for+Education+Statistics+%28ED%29%2C+Washington%2C+DC%2E%22">National Center for Education Statistics (ED), Washington, DC.</searchLink>
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  Data: For full text: http://www.nces.ed.gov/pubsearch/.
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  Data: N
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  Data: 59
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  Label: Publication Date
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  Data: 2002
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  Data: Reports - Evaluative
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  Data: <searchLink fieldCode="DE" term="%22Data+Collection%22">Data Collection</searchLink><br /><searchLink fieldCode="DE" term="%22Higher+Education%22">Higher Education</searchLink><br /><searchLink fieldCode="DE" term="%22National+Surveys%22">National Surveys</searchLink><br /><searchLink fieldCode="DE" term="%22Responses%22">Responses</searchLink><br /><searchLink fieldCode="DE" term="%22Statistical+Bias%22">Statistical Bias</searchLink><br /><searchLink fieldCode="DE" term="%22Telephone+Surveys%22">Telephone Surveys</searchLink>
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  Data: Unit nonresponse causes bias in survey estimates when the outcomes of respondents and nonrespondents are different. In the National Postsecondary Student Aid Study of 1999-2000 (NPSAS:2000) there were three levels of response, one of which was computer-assisted telephone interview (CATI) response. Because the response rates were less than 70% in some sectors or overall, an analysis was conducted to determine if CATI estimates were significantly biased due to CATI nonresponse. Through other databases, considerable information was available about CATI nonrespondents to this survey, and these data were used to analyze and reduce bias. The distribution of several variables using the design-based, adjusted weights for study respondents were found to be biased before CATI nonresponse adjustments. The CATI nonresponse and poststratification procedures, however, reduced the bias for these variables, and when the weighting was completed, no variables available for most respondent and nonrespondents had significant bias for all students combined. The bias was significantly reduced, and the remaining bias is small. Section 2 discusses the characterization of the bias before CATI nonresponse adjustment, and section 3 describes the weight adjustments used to reduce bias. Section 4 describes the bias for CATI variables, and section 5 discusses the bias remaining after weight adjustments. Section 6 discusses the overall predictive ability of the three nonresponse models, and section 7 presents conclusions. (SLD)
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  Data: 2003
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  Data: ED469645
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      – Text: English
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        PageCount: 59
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      – SubjectFull: Data Collection
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      – SubjectFull: Higher Education
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      – SubjectFull: Statistical Bias
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      – SubjectFull: Telephone Surveys
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      – TitleFull: National Postsecondary Student Aid Study 1999-2000 (NPSAS:2000), CATI Nonresponse Bias Analysis Report. Working Paper Series.
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