https://matteocampagna.com/en/registry/equipment/compound-recurve-group-size Changes to this claim in Matteo Campagna's evidence registry: its status, its year-by-year history, revisions of the page. en-gb https://matteocampagna.com/en/registry/equipment/compound-recurve-group-sizeThe answer looks obvious, yet there is only one direct comparison of groups, and it is small. In a South African study of vision, eleven compound archers and eight recurve archers, from beginners to experts and aged 12 to 58, shot three arrows at 18 metres aiming with one eye and three aiming with both, and the group was the distance between the two outermost arrows: the compound archers did better in both conditions. The authors, however, report the comparison only in words, with no values by style, and warn that a single archer with a 305-millimetre group with both eyes open weighs on the result and that technique, equipment and skill are mixed together. In 2025 an Indian study of 32 archers at 18 metres indoors finds the elite compound archers above the mean score predicted by the model and the non-elite recurve archers below it, but it measures score rather than groups, and level and discipline remain confounded. The direction is the expected one; a published figure by style, at equal level and distance, does not exist.claim:compound-ricurvo-raggruppamento:revision:2026-03-16:2Mon, 16 Mar 2026 08:00:00 GMT https://matteocampagna.com/en/registry/equipment/compound-recurve-group-sizeclaim:compound-ricurvo-raggruppamento:new_claim:2026-02-02:riportatoMon, 02 Feb 2026 08:00:00 GMT