S2A3: Thompson Sampling and Stochastic Exposure Control for High-Stakes CATs

James Sharpnack; Alexander Tsigler; J.R. Lockwood; Steven Nydick; Alina A. von Davier

S2A3: Thompson Sampling and Stochastic Exposure Control for High-Stakes CATs

James Sharpnack, Alexander Tsigler, J.R. Lockwood, Steven Nydick, Alina A. von Davier

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Abstract

We introduce S2A3, a unified Bayesian framework for high-stakes computerized adaptive testing that eliminates separate item piloting. Thompson sampling routes uncertain items to informative test-takers while soft scoring attenuates their influence on ability estimates. Stochastic Sympson-Hetter exposure control ensures bank security. Validation on the Duolingo English Test confirms rapid calibration.

Anthology ID:: 2026.aimecon-main.8
Volume:: Proceedings of the Artificial Intelligence in Measurement and Education Conference (AIME-Con): Full Papers
Month:: October
Year:: 2026
Address:: Wyndham Grand Pittsburgh Downtown, Pittsburgh, Pennsylvania, United States
Editors:: Joshua Wilson, Christopher Ormerod, Magdalen Beiting-Parrish
Venue:: AIME-Con
SIG:
Publisher:: National Council on Measurement in Education (NCME)
Note:
Pages:: 76–82
Language:
URL:: https://aclanthology.org/2026.aimecon-main.8/
DOI:
Bibkey:
Cite (ACL):: James Sharpnack, Alexander Tsigler, J.R. Lockwood, Steven Nydick, and Alina A. von Davier. 2026. S2A3: Thompson Sampling and Stochastic Exposure Control for High-Stakes CATs. In Proceedings of the Artificial Intelligence in Measurement and Education Conference (AIME-Con): Full Papers, pages 76–82, Wyndham Grand Pittsburgh Downtown, Pittsburgh, Pennsylvania, United States. National Council on Measurement in Education (NCME).
Cite (Informal):: S2A3: Thompson Sampling and Stochastic Exposure Control for High-Stakes CATs (Sharpnack et al., AIME-Con 2026)
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PDF:: https://aclanthology.org/2026.aimecon-main.8.pdf

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MODS XML
Endnote
Preformatted

@inproceedings{sharpnack-etal-2026-s2a3,
    title = "{S}2{A}3: {T}hompson Sampling and Stochastic Exposure Control for High-Stakes {CAT}s",
    author = "Sharpnack, James  and
      Tsigler, Alexander  and
      Lockwood, J.R.  and
      Nydick, Steven  and
      von Davier, Alina A.",
    editor = "Wilson, Joshua  and
      Ormerod, Christopher  and
      Beiting-Parrish, Magdalen",
    booktitle = "Proceedings of the Artificial Intelligence in Measurement and Education Conference ({AIME}-Con): Full Papers",
    month = oct,
    year = "2026",
    address = "Wyndham Grand Pittsburgh Downtown, Pittsburgh, Pennsylvania, United States",
    publisher = "National Council on Measurement in Education (NCME)",
    url = "https://aclanthology.org/2026.aimecon-main.8/",
    pages = "76--82",
    ISBN = "979-8-9983004-0-0",
    abstract = "We introduce S2A3, a unified Bayesian framework for high-stakes computerized adaptive testing that eliminates separate item piloting. Thompson sampling routes uncertain items to informative test-takers while soft scoring attenuates their influence on ability estimates. Stochastic Sympson-Hetter exposure control ensures bank security. Validation on the Duolingo English Test confirms rapid calibration."
}

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%0 Conference Proceedings
%T S2A3: Thompson Sampling and Stochastic Exposure Control for High-Stakes CATs
%A Sharpnack, James
%A Tsigler, Alexander
%A Lockwood, J. R.
%A Nydick, Steven
%A von Davier, Alina A.
%Y Wilson, Joshua
%Y Ormerod, Christopher
%Y Beiting-Parrish, Magdalen
%S Proceedings of the Artificial Intelligence in Measurement and Education Conference (AIME-Con): Full Papers
%D 2026
%8 October
%I National Council on Measurement in Education (NCME)
%C Wyndham Grand Pittsburgh Downtown, Pittsburgh, Pennsylvania, United States
%@ 979-8-9983004-0-0
%F sharpnack-etal-2026-s2a3
%X We introduce S2A3, a unified Bayesian framework for high-stakes computerized adaptive testing that eliminates separate item piloting. Thompson sampling routes uncertain items to informative test-takers while soft scoring attenuates their influence on ability estimates. Stochastic Sympson-Hetter exposure control ensures bank security. Validation on the Duolingo English Test confirms rapid calibration.
%U https://aclanthology.org/2026.aimecon-main.8/
%P 76-82

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Markdown (Informal)

[S2A3: Thompson Sampling and Stochastic Exposure Control for High-Stakes CATs](https://aclanthology.org/2026.aimecon-main.8/) (Sharpnack et al., AIME-Con 2026)

S2A3: Thompson Sampling and Stochastic Exposure Control for High-Stakes CATs (Sharpnack et al., AIME-Con 2026)

ACL

James Sharpnack, Alexander Tsigler, J.R. Lockwood, Steven Nydick, and Alina A. von Davier. 2026. S2A3: Thompson Sampling and Stochastic Exposure Control for High-Stakes CATs. In Proceedings of the Artificial Intelligence in Measurement and Education Conference (AIME-Con): Full Papers, pages 76–82, Wyndham Grand Pittsburgh Downtown, Pittsburgh, Pennsylvania, United States. National Council on Measurement in Education (NCME).