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National Survey of America's Families

2002 Methodology Series

Abi-Habib, N., Safir, A., and Triplett, T., No. 1: NSAF Survey Methods and Data Reliability, September, 2004.

Report No. 1 provides readers with an introduction to the National Survey of America's Families, its sample design, data collection techniques, and estimation methods. An overview is also provided describing the survey's dual-frame design, the format of interviews, and the types of questions asked. In addition, the methods used to minimize errors and compensate for those that are unavoidable in data collection are described. Finally, the report presents information on the survey's resulting reliability—both in terms of sampling and nonsampling errors.

Brick, J.M., Ferraro, D., Strickler, T., and Liu, B., No. 2: 2002 NSAF Sample Design, July, 2003.

Report No. 2 describes the sample design for the 2002 NSAF. As in previous rounds of the survey, the 2002 NSAF sample consists of a random digit dial (RDD) telephone sample supplemented by an area probability sample of nontelephone households. While the nontelephone sample for previous NSAF rounds were both nationally and state representative, the 2002 NSAF used only a nationally representative nontelephone sample. The report covers both the telephone and nontelephone sample design, adjustments made to the sample design during the field period, within household sampling procedures and achieved sample sizes.

Brick, J.M., Ferraro, D., Strickler, T., Rauch, C., and Passel J.S., No. 3: Weighting Procedures for the 2002 NSAF, November, 2004.

Report No. 3 describes the weighting procedures used in the 2002 NSAF, and aims to explain the weighting in heuristic steps that will make technical matter accessible. As one of the goals of NSAF is to produce estimates of change, Round 3 estimation is compared to estimation procedures in Rounds 1 and 2. Chapter 1 of this report is written for the general reader and describes the weighting and estimation process in broad stokes, including a general overview of the survey, the goals of weighting and some specifics about how it is carried out, a discussion of how the weights are best used and details on estimates of change. Subsequent chapters address base weights and nonresponse adjustments, national adjustments to control totals, and study area adjustments to control totals.

Brick, J.M., Ferraro, D., and Strickler, T., No. 4: Variance Estimation for the 2002 NSAF, February, 2004.

Report No. 4 describes the methods and estimated sampling errors for statistics from the 2002 survey. Sections of the report provide an overview of the sample design, summarize the precision of the survey estimates, and discuss the computation of sampling error estimates for differences estimated from NSAF data. A general review of the two main methods of computing sampling errors of estimates from surveys with complex survey designs is also presented, including a detailed discussion of the replication method of variance estimation and an overview of available software available for computing sampling errors.

Christian, J., Konigsburg, T., No. 5: 2002 NSAF In-Person Survey Methods, August, 2003.

Report No. 5 describes procedures used to conduct interviews with nontelephone households in the 2002 NSAF. The report describes the procedures, materials, management structure, field organization, recruitment and training of interviewers used to conduct the interviews.

Abi-Habib, N., Black, T., Pratt, S., Safir, A., Steinbach, R., Triplett, T., Wang, K., Westat, and DataSource, No. 6: 2002 NSAF Collection of Papers, February, 2005.

Report No. 6 is a collection of occasional papers on technical issues in the design, implementation, and operation of the 2002 round of the NSAF. It is a companion report to the 1999 methodology series Report No. 7 NSAF Collection of Papers and the 1997 methodology series Report No. 16 NSAF Technical Papers. All the papers in this collection were presented at either the annual May American Association for Public Opinion Research conference or the annual August Joint Statistical Meetings.

Triplett, T., No. 7: 2002 NSAF Nonresponse Analysis, June, 2006.

Report No. 7 focuses on the characteristics of nonrespondents to the 2002 NSAF and assesses the impact of nonreponse on the NSAF statistics. It includes analysis of the effectiveness of the call attempt and refusal conversion strategies across all three rounds of NSAF data collection, providing some insights on how the level of effort affects the quality of the data by reducing nonresponse. This report also includes a sociodemographic comparison of nonrespondents using census block information obtained for 2002 nonrespondents and respondents.

Brick, J.M., Ferraro, D., Strickler, T., and Rauch, C., No. 8: 2002 NSAF Response Rates, December, 2003.

Report No. 8 provides information on the weighted response rates obtained for the 2002 NSAF. The report describes the use of response rates in evaluating the potential bias owing to nonresponse and methods used to calculate the NSAF response rates. Detailed response rate tables are provided for the main NSAF units of analysis, children and nonelderly adults (under age 65). The report also compares response rates across the three rounds of the NSAF and places these changes in the context of changes in response rates for other telephone surveys.

Warren, P., Cunningham, P., No. 9: 2002 NSAF Telephone Survey Methods, June, 2003.

Report No. 9 describes methods employed to complete the telephone component of the 2002 NSAF including a list-assisted method to select the random digit dialing (RDD) sample of telephone numbers and computer-assisted telephone interviewing (CATI) for screening and interviewing. The report also covers subsampling of telephone households, sampling of respondents within the household, and data quality control methods.

Triplett, T., No. 10: 2002 NSAF Data Editing and Imputation, July, 2005.

Report No. 10 focuses on the data editing techniques and imputations that were unique to the 2002 NSAF data processing steps. It is a supplement to the 1997 and 1999 NSAF data editing reports (No. 10 in both series), and does not reiterate the data editing techniques, data processing, and coding guidelines documented in these prior reports.

Abi-Habib, N., Safir, A., and Triplett, T., No. 11: NSAF Public Use File User's Guide, November, 2004.

Report No. 11 provides documentation for the 1997-2002 NSAF Public Use Files, each set of which includes data on approximately 42,000 households, yielding information on over 100,000 people. This report gives an overview of the survey, describes the sample design and methodology used, and discusses the limitations on use of the survey data. After providing an overview of the NSAF data, it also describes how to use the data files, and offers instructions and examples on how to use the NSAF survey weights.

Abi-Habib, N., Safir, A., Triplett, T., and Cunningham, P., No. 12: 2002 NSAF Questionnaire, April, 2004.

Report No. 12 focuses on the 2002 NSAF questionnaire. The introductory chapter describes the household screener and extended interview. In addition, the chapter covers respondent selection, types of NSAF interviews, and the NSAF family definition so that the reader may gain a better understanding of the NSAF questionnaire. The second chapter describes differences in the survey instruments between the 1999 and 2002 NSAF surveys. The remainder of the report provides the full text of the 2002 questionnaire.