1. Given the following set of retrieved documents with relevance judgments TERM

ID: 658190 • Letter: 1

Question

1. Given the following set of retrieved documents with relevance judgments

TERM T1 T2 T3 T4 T5 T6

QUERY 0 0 0 2 1 0

REL D1 0 4 4 0 2 0

REL D2 0 2 6 0 0 0

REL D3 6 0 0 0 0 0

NOT REL D4 4 0 4 8 8 10

a. Calculate a new query using a factor of 1/2 for positive feedback and 1/4 for negative feedback

b. Determine which documents would be retrieved by the original and by the new query

c. Discuss the differences in documents retrieved by the original versus the new query.

D Look at the changes to from the original query to the new query and discuss those changes?

Answer a) The new query obtained by:

Q(new) = Q (original ) + 1/2 Q(rel) - 1/4 Q(nonrel)

= (0,0,0,2,1) +

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.