['28', 'Jaffe,', 'Kanzler,', 'Friedman', 'and', 'Kaplan', 'group', 'decreased', 'nicotine', 'exposure', 'more', 'than', 'did', 'the', 'No', 'Money-No', 'Message', 'group', '(p<.03).', 'In', 'order', 'to', 'examine', 'the', 'rate', 'of', 'change', 'within', 'the', 'experimental', 'groups', 'over', 'the', 'twelve', 'weeks,', 'repeated', 'measures', 'ANOVAs', '(four', 'factors', '—', 'money,', 'message,', 'sex,', 'and', 'weeks)', 'were', 'performed', 'for', 'logarithmically', 'transformed', 'tar', 'and', 'nicotine', 'exposure', 'values', 'obtained', 'at', 'baseline,', 'three,', 'six,', 'nine', 'and', 'twelve', 'weeks.', 'No', 'signif-', 'icant', 'main', 'effects', 'or', 'intereactions', 'were', 'found', 'for', 'either', 'message', 'or', 'sex.', 'However,', 'for', 'both', 'tar', 'and', 'nicotine', 'exposures', 'significant', '(p<.01)', 'week', 'x', 'money', 'interactions', 'were', 'found,', 'indicating', 'that', 'the', 'differences', 'between', 'the', 'Money', 'and', 'No', 'Money', 'groups', 'increased', 'as', 'the', 'study', 'progressed.', 'Figure', '|', 'demonstrates', 'graphically', 'the', 'increasing', 'divergence', 'over', 'time', 'of', 'the', 'Money', 'from', 'the', 'No', 'Money', 'groups.', 'In', 'view', 'of', 'the', 'absence', 'of', 'a', 'sex', 'main', 'effect,', 'the', 'sexes', 'have', 'been', 'combined', 'for', 'the', 'purposes', 'of', 'this', 'graph.', 'The', 'monetary', 'incentives,', 'therefore,', 'produced', 'changes', 'saree', 'Money-Messoge', 'co', 'rn', 'Money-No', 'Message', 'wwene', 'No', 'Money-Messoge', 'No', 'Money-No', 'Messoge', '     ', ' ', ' ', 'Nicotine', 'log', 'Daily', 'Exposure', 'peese,', '12', '12', 'wks', '6', 'wks', '@', 'wks', 'Bose', '3', 'wks', 'Figure', '1', 'Mean', 'daily', 'exposure', 'of', 'tar', 'and', 'nicotine', '(log', 'transformed)', 'at', 'three-week', 'intervals', 'dur-', 'ing', 'study.', 'beyond', 'that', 'caused', 'by', 'mere', 'participation', 'in', 'the', 'study.', 'But,', 'how', 'was', 'the', 'money', 'effect', 'produced?', 'Did', 'a', 'greater', 'proportion', 'of', 'subjects', 'in', 'the', 'Money', 'groups', 'switch', 'down,', 'while', 'fewer', 'No', 'Money', 'subjects', 'elected', 'to', 'change', 'brands?', 'Or', 'was', 'it', 'that', 'equal', 'numbers', 'from', 'all', 'groups', 'switched', 'down,', 'but', 'by', 'the', 'twelfth', 'week', 'the', 'brands', 'purchased', 'by', 'the', 'Money', 'groups', 'included', 'more', 'of', 'the', 'Low', 'and', 'Very', 'Low', 'tar/nicotine', 'brands?', '9ESL', 'ELtcs']