This report contains results from the interview debriefing component of the Census Bureau’s Simplified Questionnaire Test (SQT) conducted in the Spring of 1992. The SQT was a nationwide mailout/mailback test conducted to evaluate the effects of a shortened questionnaire length, respondent friendly formats, request for social security number (SSN) and a multiple contact implementation strategy on mailback rates. Four experimental questionnaires were used in addition to the 1990 census short form which served as the control. The experimental questionnaires consisted of a user-friendly “booklet” form, a shortened “micro” form, a microform including a request for SSN and finally, a dramatically reduced “postcard” or “roster” form. For a more detailed description of the SQT’s treatment groups, implementation strategy and sampling design, see “Preliminary Results of the Mail Response Evaluation for the SQT,” (Sinclair and West, 1992).