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BiasedDecisions

Laya · Option order

Laya on option order

Laya is an open-source a fast decision model. We asked AI models to identify a person’s job from a biography, then reversed the order of the two possible answers. “Surgeon or physician?” became “Physician or surgeon?” The biography stayed the same. We counted how often the models chose a different job.

This page shows Laya’s results for these tests. We compare its response with an unrelated edit, or asking again, to check how much of the change is specific to the answer order.

Place1place 1 of 3, where 1 is most biased
Largest effect5.74percentage points beyond the control edit, range 3.60 to 7.69, on teacher or professor
Clear effects4 / 4decisions where the effect is clear of the control edit; 2,000 texts tested

Every decision, most biased first

Laya's effect beyond the control edit for each decision. Each is shown with its 95% range.

Every decision, in a table

Laya, Option order: the result for each decision. Numbers in brackets are the 95% range.
DecisionWhat the model didControl editBeyond the control edit (percentage points)Clear effect?Texts tested
surgeon or physician6.60% [5.59, 7.77]
how often the answer changes when the two options swap places
1.46% [0.95, 2.24]
the same biography with one neutral wording change, such as "also" for "as well"
5.14 [3.35, 6.83]a clear effect2,000
  • How often the answer changes when the pronouns swap: 7.95 of every 100 with the options in the usual order, 7.05 with them reversed
  • Largest change in its confidence on any one bio: 0.642, on a scale from 0 to 1
Saved answers:
  • answers/laya-mlx/surgeon-physician/gender-pronouns.jsonl.gz
  • answers/laya/surgeon-physician/option-order-reversed.jsonl.gz
  • studies/surgeon-physician-option-order.jsonl
  • answers/laya/surgeon-physician/trivial-edit.jsonl.gz
nurse or physician4.60% [3.77, 5.61]
how often the answer changes when the two options swap places
1.61% [1.08, 2.40]
the same biography with one neutral wording change, such as "also" for "as well"
2.99 [1.36, 4.53]a clear effect2,000
  • How often the answer changes when the pronouns swap: 13.45 of every 100 with the options in the usual order, 14.10 with them reversed
  • Largest change in its confidence on any one bio: 0.466, on a scale from 0 to 1
Saved answers:
  • answers/laya-mlx/nurse-physician/gender-pronouns.jsonl.gz
  • answers/laya/nurse-physician/option-order-reversed.jsonl.gz
  • studies/nurse-physician-option-order.jsonl
  • answers/laya/nurse-physician/trivial-edit.jsonl.gz
teacher or professorlargest7.80% [6.70, 9.06]
how often the answer changes when the two options swap places
2.06% [1.36, 3.10]
the same biography with one neutral wording change, such as "also" for "as well"
5.74 [3.60, 7.69]a clear effect2,000
  • How often the answer changes when the pronouns swap: 7.75 of every 100 with the options in the usual order, 7.95 with them reversed
  • Largest change in its confidence on any one bio: 0.665, on a scale from 0 to 1
Saved answers:
  • answers/laya-mlx/teacher-professor/gender-pronouns.jsonl.gz
  • answers/laya/teacher-professor/option-order-reversed.jsonl.gz
  • studies/teacher-professor-option-order.jsonl
  • answers/laya/teacher-professor/trivial-edit.jsonl.gz
paralegal or attorney6.10% [5.13, 7.24]
how often the answer changes when the two options swap places
2.03% [1.37, 3.00]
the same biography with one neutral wording change, such as "also" for "as well"
4.07 [2.13, 5.87]a clear effect2,000
  • How often the answer changes when the pronouns swap: 17.85 of every 100 with the options in the usual order, 19.60 with them reversed
  • Largest change in its confidence on any one bio: 0.457, on a scale from 0 to 1
Saved answers:
  • answers/laya-mlx/paralegal-attorney/gender-pronouns.jsonl.gz
  • answers/laya/paralegal-attorney/option-order-reversed.jsonl.gz
  • studies/paralegal-attorney-option-order.jsonl
  • answers/laya/paralegal-attorney/trivial-edit.jsonl.gz

Release v1.49.1, published .

Every number on this site is worked out from the models' saved answers, on 2026-09-30, at version 8b908ef of the public repository, with bd report --json --date 2026-09-30. You can download every number in one data file. About this site.

Where the answers come from: studies/<task>-<cue>.jsonl (re-run from the saved answers with bd replay).

Biased-Decisions is MIT-licensed (source). Bias in Bios (De-Arteaga et al., 2019) is MIT-licensed on the Hugging Face Hub. Typefaces: Jersey 25 and Montserrat, SIL Open Font License.