ISR11 Relevance Feedback in an Information Retrieval System chapter W. Riddle T. Horwitz R. Dietz Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. vi1[OCRerr]4 Ranks of the Progression Correlation Re1ev[OCRerr]nt Documents Normalized No[OCRerr]na1ized of Alpha Function Iteration Appearing in the Recall Precision ___________ _________ Top Fifteen [OCRerr],3,2 Cosine 0 3,lf,1[OCRerr] .706 .51[OCRerr] 1 1,2,5 .665 .607 2 1,2,5 .662 .606 _______ 3 1,2,5 .662 .606 5,[OCRerr],3 Cosine 0 [OCRerr] .706 .5i4 1 1,2,5 .662 .606 2 1,2,5 .662 .606 ___________ 3 1,2,5 .662 .606 3/15,2/15,1/15 Cosine 0 [OCRerr] .706 .51[OCRerr] 1 1,3,5 .708 .609 2 1,3,5 .686 .598 _______ 3 1,3,5 .686 .618 [OCRerr]/15,3/15,2/15 Cosine 0 3,1+,14 .706 .51[OCRerr] 1 1,3,5 .697 .603 2 1,2,5 .686 .618 _______ 3 1,2,5 .682 .616 5/15,[OCRerr]/15,3/15 Cosine 0 3,[OCRerr],14 .706 .5i4 1 1,2,5 .693 .620 2 1,2,5 .680 .6i[OCRerr] _____________ 3 1,2,5 .677 .613 Correlations Cosine 0 [OCRerr] .706 .5i4 1 1,3,5 .677 .595 2 1,2,5 .668 .609 ______________ ___________ 3 1,2,5 .662 .591 Figure 6 (continued)