Validating a survey instrument
Finally, new in round 5 was the addition of a question that asked respondents why they completed the interview.
Between November 2002 and June 2003, 876 respondents completed validation reinterviews for round 6.
The short telephone questionnaire included a validation component that asked for details about the respondents' original round 4 interviews (e.g., duration, mode) and information on whether or not they were paid for their participation.
The reinterview component involved re-asking questions that were drawn directly from the youth interview.
Re-interview questions included marital status, current employer name and start date, three child-care questions (if female and born in 1983-84), and the respondent's total income from the previous year.
Respondents also were asked whether the interviewer they had in round 5 was the same one who conducted their interview in round 4.
Between October 2003 and July 2004, 1,145 respondents completed validation reinterviews for round 7.
This produced an overall project validation rate of 14.8 percent of completed interviews.
This produced an overall project validation rate of 11.9 percent of completed interviews.
After each round of the NLSY97, validation reinterviews are conducted with randomly selected respondents.
Validation data for many of the rounds are available to public users and offer opportunities for studying response variance, item reliability, and other methodological issues.
This component included some characteristics of their current residence, several expectations questions, a question about weekly family activities, and two questions concerning the respondent's income from the previous year.
Finally, respondents were asked whether the interviewer they had in round 4 was the same one who conducted their interview in round 3.The data from validation can be used to study the consistency of responses between the interview and reinterview.