Discussion Class 5. TREC. Discussion Classes. Format: Questions. Ask a member of the class to answer. Provide opportunity for others to comment. When answering: Stand up. Give your name. Make sure that the TA hears it. Speak clearly so that all the class can hear. Suggestions:
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Ask a member of the class to answer.
Provide opportunity for others to comment.
Give your name. Make sure that the TA hears it.
Speak clearly so that all the class can hear.
Do not be shy at presenting partial answers.
Differing viewpoints are welcome.
The TREC workshop series has four goals:
(a) Encourage research in text based retrieval based on large test collections
(b) Communication among industry, academia and government
(c) Transfer of technology from research labs into products by demonstrating methodologies on real-world problems
(d) Increase availability of appropriate evaluation techniques
What does the ad hoc task contribute to each of these goals?
Source Size # Docs Median
Wall Street Journal, 87-89 267 98,732 245
Associated Press newswire, 89 254 84,678 446
Computer Selects articles 242 75,180 200
Federal Register, 89 260 25,960 391
abstracts of DOE publications 184 226,087 111
Wall Street Journal, 90-92 242 74,520 301
Associated Press newswire, 88 237 79,919 438
Computer Selects articles 175 56,920 182
Federal Register, 88 209 19,860 396
What characteristics of this data are likely to impact the results of experiments?
Explain the statement, "Disks 1-5 were used as training data."
Suppose that you were designing two search engines: (i) for use with a library catalog, (ii) for use with a Web search service. How does your data differ from the TREC corpus?
<num> Number: 409
<title> legal, Pan Am, 103
What legal actions have resulted from the destruction of Pan Am Flight 103 over Lockerbie, Scotland, on December 21, 1988?
Documents describing any charges, claims, or fines presented to or imposed by any court or tribunal are relevant, but documents that discuss charges made in diplomatic jousting are not relevant.
A sample TREC topic statement
(a) What is the relationship between TREC topic statements and queries?
(b) Distinguish between manual and automatic methods of query generation.
(c) Explain the process used by the manual methods.
(d) Some of the results used a time limit (e.g., "limited to no more than 10 minutes clock time"). What was being timed?
(a) Explain the statement, "All TRECs have used the pooling method to assemble the relevance assessments."
(b) How is relevance assessed?
(c) What is the impact of some relevant documents being missed from the pool?
(d) What is the problem of some relevant documents in the pool coming from only a single run? How serious is this?
(a) The recall-precision curve?
The mean (non-interpolated) average precision?
The report commented that, "two topics are fundamental to
effective retrieval performance." What are they?
How do the automatic tests differ from the manual?
(a) Why was TREC-8 the last year for the ad hoc task?
(b) Does this mean that text-based information retrieval is now solved?