VITAL AND HEALTH STATISTICS,Ser. 191,756756 2, nr. 45 REPORTING Reporting health events in household interviews : Effects of reinforcement,question length,and reinterviews.A methodological study designed to test the effectiveness of certain questionaire... Rockville 1972 U.S.Department of Health, Education,and Welfare.Public Health Service. 4° s. VIII, 70, ilustr. Vital and Health Statistics, ser.2 , nr 45. Data Evaluation and Methods Research.