Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Surprise: Result List Truncation via Extreme Value Theory   Work in information retrieval has largely been centered around ranking and
relevance: given a query, return some number of results ordered by relevance to
the user. The problem of result list truncation, or where to truncate the
ranked list of results, however, has received less attention despite being
crucial in a variety of applications. Such truncation is a balancing act
between the overall relevance, or usefulness of the results, with the user cost
of processing more results. Result list truncation can be challenging because
relevance scores are often not well-calibrated. This is particularly true in
large-scale IR systems where documents and queries are embedded in the same
metric space and a query's nearest document neighbors are returned during
inference. Here, relevance is inversely proportional to the distance between
the query and candidate document, but what distance constitutes relevance
varies from query to query and changes dynamically as more documents are added
to the index. In this work, we propose Surprise scoring, a statistical method
that leverages the Generalized Pareto distribution that arises in extreme value
theory to produce interpretable and calibrated relevance scores at query time
using nothing more than the ranked scores. We demonstrate its effectiveness on
the result list truncation task across image, text, and IR datasets and compare
it to both classical and recent baselines. We draw connections to hypothesis
testing and $p$-values.

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The categories of this paper are: supr-con
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The categories of this paper are: math
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The categories of this paper are: cond-mat
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: hep-th
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-alg
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The categories of this paper are: nlin
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The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys