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Seminar paper · the review

What the literature actually measures

Over-refusal is widely named. Far less often is it measured — with a refusal rate, on a stated instrument, against a stated baseline. The review separates the two, and the separation is the finding.

OpenAlex 633 · Scopus 136 Screened 571 93 included One screener · intra-rater audit

PRISMA 2020

The flow closes arithmetically

Excluded, carried forward and included sum exactly to the number screened. Click any stage to see what it holds.

Screening flow. "Carried to full text" is a deferral, not a decision: the class is recorded and adjudicated separately so that a later full-text pass can pick it up without re-screening.

Select a stage.

Why records were excluded

Most of the field does not measure refusal at all

Of 370 screening exclusions, 264 failed one criterion: the paper never reports a refusal rate on a stated instrument. A further 95 studied attack success only. That is not a judgement about their quality — it is the criterion doing its job, and the reason the included set is small.

Exclusion reason, both databases pooled.
ReasonOpenAlexScopusTotal

The two databases agree closely on the shape of the exclusion profile — 64.6 % against 67.9 % for "no refusal measurement" — which is what you want from an index-independent rule.

The included corpus

What kind of study gets included, and when

Included studies by year and contribution type. Mitigation studies are the largest class in every year — the field is producing fixes faster than instruments to test them. The corpus is also overwhelmingly recent: 2026 alone contributes 62 of the 93.
Included studies by domain group.
Mitigation families studied. Records with no mitigation arm are excluded from this chart, not counted as zero.

Reliability, honestly

One screener, so no κ

With a single screener there is no between-rater agreement to compute. What can be computed is whether the same rule, applied twice by the same person, lands in the same place. That is a weaker and different quantity, and it is labelled as such everywhere it appears.

Three-way agreement
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include / unsure / exclude, 10 % re-screen
Same exclusion reason
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where both passes excluded
Calibration sheet
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records coded by hand, ready for a second screener

The re-screen was taken minutes after the first pass, so short-term memory inflates the figure: it is an upper bound on how stable the rule would be under a genuinely delayed re-screen, and it is never presented as agreement between two people.