//: activescanning
References
The research and reporting behind ActiveScanning. Primary peer-reviewed work is what the product is built on. Press and popular sources are cited for named players and quotes, not for method. Commercial sources are flagged — marketing, not research.
//: research — primary (peer-reviewed)
1Jordet, G., Aksum, K.M., et al. (2020). Scanning, Contextual Factors, and Association With Performance in EPL Footballers. Frontiers in Psychology 11, 553813.
2Aksum, K.M., et al. (2021). Scanning activity in elite youth football players. Journal of Sports Sciences 39(21), 2401–2410.
3Aksum, K.M., Sevimli, D., Flaten, V., Bjørndal, C.T., Helsen, W.F. (2021). Scanning activity of elite football players in 11v11 match play. PLOS ONE 16(1), e0244118.
4McGuckian, T.B., Cole, M.H., Jordet, G., et al. (2018). Don't Turn Blind! Frontiers in Psychology 9, 2520.
5Jordet, G., Bloomfield, J., Heijmerikx, J. (2013). The hidden foundation of field vision in EPL soccer players. MIT Sloan Sports Analytics Conference.
6Pelzl, D. (2024). A Longitudinal Case Study on the Effects of an Ecological Training Intervention in an Elite Football Player. Master's thesis, University of Groningen.Single-case N=1; no control group; thesis carries the standard Groningen "not necessarily suitable as an academic source" disclaimer. Supports: scanning behaviour is trainable. Does not support: scanning improves performance (Chi-Square found no significant link to ball retention). Attributes the critical-scan definition to Jordet 2005.
7Abächerli, L., Fuchslocher, J., Romann, M., Hintermann, M. (2026). Scan frequency and timing in elite youth female football players. Frontiers in Sports and Active Living.
8Sargsyan, A. (2026). Rethinking the Central Midfielder: Intelligence over Power. Athens Journal of Sports 13(2), 139–152.
9Bonetti, L., Fernández-Rubio, G., Andersen, M.M., et al. (2025). Decoding the elite soccer player's psychological profile. Proceedings of the National Academy of Sciences 122(3), e2415126122. doi:10.1073/pnas.2415126122.Corrected 05.08.2026: the reference previously carried no title, volume, pages or DOI — it could not be looked up. ⚠️ The source carries a published correction (doi:10.1073/pnas.2526834122): the authors first reported two-sample t tests; they were one-sample t tests against a fixed mean. It is also contested in two published exchanges in PNAS (Musculus et al., doi:10.1073/pnas.2502322122; Fitzgerald et al., with the authors' reply doi:10.1073/pnas.2521662123). We cite it as context for cognitive profile distinguishing elite players from the general population — never as a basis for talent selection, and never with figures.
10Bespomoshchnov, V.A., O'Sullivan, M., Woods, C.T., Jordet, G. (under review, 2026). What scanning is not.Nuance / counter-voice — included deliberately.
21Hunter, A.H., Smith, N., Santiago, P.R.P., Wilson, R.S. (2025). Visual Scanning and Technique Improve Performance in a Standardized Soccer Passing Task. Applied Sciences 15(20), 11045. doi:10.3390/app152011045.Full-text verified 07.08.2026. n=45 elite U12–U13 (Brazil). Players scanned before just 29% of receptions; only 1 in 6 players above 50%. Scanners: correct turn 51→73%, fewer control errors (31→11%), fewer misses (10→3%). ⚠️ Test setting (rebound boards), not match scanning per the Jordet definition — and correlation, not a training effect. We cite the base rate and the direction, never as a benchmark for an individual player.
27Hunter, A.H., Smith, N.M.A., Bitugu, B.B., Luguterah, A.W., Wilson, R.S. (2025). Scanning When Passing: A Reliable and Valid Standardized Soccer Test. Biomechanics 5(3), 61. doi:10.3390/biomechanics5030061.The methods paper behind [21] — same test battery, validated on adults (n=54, Ghana, ICC 0.77–0.85 with errors excluded; the 120°/180° tests distinguish playing level and correlate with 3v1 games, R² 0.50–0.55). ⚠️ The most scanning-demanding variant (360°) did not validate — few players scanned at all. We cite the battery as a measurement tool, not the 360° test as evidence.
22Basher, A.M., Yonis, M.H. (2025). The effect of tactical visual scanning exercises on visual abilities of deaf soccer players. Journal of Human Sport and Exercise 20(4), 1322–1331.
23Erişik, K., Cerrah, A.O., & Cinarli, F.S. (2025). Effects of virtual reality-based cognitive and technical drills on scanning and passing performance in youth football players: a randomized controlled study. BMC Sports Science, Medicine and Rehabilitation 17, 371.RCT, 22 youth players U16-U17, 7-week VR scanning intervention. Evidence that scanning behaviour is trainable, not innate. Percentage-change figures are mean-based from a small single-academy sample — we cite the trainability finding, never the percentages.
24Smith, S.M. & Conway, K. (2025). Scanning Differences between Small-Sided and Full-Sized Games in Elite Youth Footballers. International Journal of Physical Education, Fitness and Sports 14(1), 10–20. doi:10.54392/ijpefs2512.U12 data. Scan frequency is not comparable across game format (2828 scans in 7v7 vs 1289 in 11v11); scans-per-involvement lower in small-sided (0.70 vs 0.90).
25Phatak, A. & Gruber, M. (2019). Keep Your Head Up — Correlation between Visual Exploration Frequency, Passing Percentage, and Turnover Rate in Elite Football Midfielders. Sports 7(6), 139. doi:10.3390/sports7060139.Supports: scanning correlates with better passing in elite players. Does not support percentage performance gains — R² only 3–4%, authors themselves flag low practical relevance.
26Jordet, G. (2005). Perceptual Training in Soccer: An Imagery Intervention Study with Elite Players. Journal of Applied Sport Psychology 17(2), 140–156. doi:10.1080/10413200590932452.Origin of the 2-second pre-reception scanning window (set-play, possession, keeper, cross as onset cues) and the exploration-to-ball-contact measure that critical scan builds on. Does not use the term "critical scan" — the terminology is later; this is the conceptual and methodological origin.
//: press / popular (named players, quotes)
11Sky Sports (27.06.2021). Kevin De Bruyne is a master at scanning: Geir Jordet on the science.
12Jobs In Football (15.08.2023). Geir Jordet interview.
13Eyes Up Soccer / SwitchedOn.
14The Coaches Link (10.02.2021).
15Sky Sports / AllFootball.
16Aksum, K.M. on X (@aksumfootball, 11.03.2025). "doubtful if I have ever seen a better scanner than Vitinha (PSG)".
17Mozzartbet (12.03.2025). Vitinha vs Liverpool; Aksum quote; Henry "a completely different sport".
18The Guardian / The Blizzard (22.12.2020). What is football intelligence?
19fotballtreneren.no (06.08.2025). Aksum / Mjällby success (Norwegian).
//: tools / commercial (cited with caution — marketing, not research)
20A-Champs / beyourbest.com — uses Jordet name commercially. Not used for figures.
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