They exploit the 1994 CPS questionnaire redesign, which replaced the paper and pencil questionnaire with computer assisted interviewing.
While in the first three waves the students were surveyed within their classes using online questionnaires, the follow-up was conducted as an individual survey, using a combination of online questionnaires and computer assisted telephone interviews (CATI).
The interviewing team consisted of approximately 25 women, all of whom had a great deal of experience administering questionnaires using computer assisted telephone interviewing (CATI).
Data included direct child assessments during home visits, parent/caregiver computer assisted personal interviews (CAPI), self-administered questionnaires at 9 months, and audio-computer assisted parent (or other caregiver) interviews at 4, 5, and 6 years for sensitive items.
Consenting patients completed a self-administered questionnaire (SAQ) and computer assisted telephone interview (CATI).
To ensure consistency of mode of data collection, participants will then be taken to a nearby room where a research specialist will telephone the participant and administer the baseline questionnaire using a computer assisted interviewing program.
Women were randomly assigned to one of three data collection methods: computer assisted telephone interview (CATI), self-administered mailed questionnaire (SAMQ) and computer-assisted self-interview (CASI).
Interviews in Germany were done through computer assisted personal interviewing (CAPI), but paper questionnaires as supporting documents were available in other languages as well, including Albanian, Bosnian/Croatian/Serbian, English, French, Italian, Russian, Spanish and Turkish.
Computer assisted telephone interviews based on a structured questionnaire were conducted on eligible participants (one selected by the 'next birthday' method) who had provided oral consent.
Computer assisted self-interviewing was used for the online questionnaire and participants were not rewarded for filling out the questionnaire.
