Training preschool children's executive functions (ages 3–6) raises their scores on executive-function tests by about a third of a standard deviation, but has not been shown to raise learning-related or academic outcomes reliably compared with control groups: one meta-analysis found no significant extra effect on learning and behaviour outcomes pooled together (g = 0.17, not significant; Scionti et al. 2020), while another found literacy and numeracy gains of about 0.4 standard deviations in 4- to 6-year-olds right after training, resting on very few studies per outcome and including non-randomised ones (Birtwistle et al. 2025).
Status
weakened
Last change
2026-11-05
Serves
Q1 (How do humans actually learn, and what helps them learn best?)
Ages
foralder-tidig-barndom
Area
Early childhood and language
Relates to
C29 relates-to C30 (training one skill does not lift unrelated school results)
Bounds
Stand-alone cognitive training for ages 3–6 (computer or game-based tasks); not whole curricula such as Tools of the Mind and not physical activity. Evidence on file: Scionti, Cavallero, Zogmaister & Marzocchi 2020 (Frontiers in Psychology 10, 2812, DOI 10.3389/fpsyg.2019.02812; full text read 2026-11-05, open access, PMC6965160): 32 studies (randomised or pre-post with an active or passive control, at least 10 sessions), 123 effect sizes; executive functions g = 0.352; larger for at-risk children. Non-EF outcomes (learning-related, behaviour and problem-behaviour measures pooled together): 39 outcomes from 15 studies, g = 0.169 (SE 0.106, 95% CI −0.047 to 0.383, p = .122); the discussion gives g = 0.10 for the same analysis, an inconsistency in the paper; academic outcomes were not pooled on their own. Melby-Lervåg & Hulme 2013 (Developmental Psychology; already in the library): working-memory training gave near but not far transfer (adjacent support). Weakened 2026-10-31 (nightly attacks): Birtwistle, Chernikova, Wünsch & Niklas 2025 (SAGE Open 15(1), DOI 10.1177/21582440241311060; full text, open access): 57 published RCTs and quasi-experiments of EF training (at least 80 minutes) in typically developing children aged 3–14, immediate post-tests only; ages 4–6 (29 studies): near transfer g = 0.25, far transfer g = 0.34 (p = .05), literacy g = 0.40 (df = 4), numeracy g = 0.39 (df = 5), reasoning ns; I² = 84%. Melby-Lervåg & Hulme 2013 (full text, corrected 2026-10-31): working-memory training at all ages, mean 12 hours; immediate word decoding d = 0.13 (95% CI −0.07 to 0.35) and arithmetic d = 0.07 (−0.13 to 0.27), both non-significant; follow-ups 3–8 months later all non-significant (Table 4). The 'no academic gain' side rests on Scionti et al.'s pooled non-EF estimate, which mixes learning-related and behaviour outcomes (full text read 2026-11-05).
What would kill this
A meta-analysis of randomised preschool cognitive-training trials finds a reliable gain on academic or learning-related outcomes, not only on executive-function tests, on a delayed test or with enough studies per outcome that the gain does not rest on a handful (sharpened 2026-10-31 with the weaken: Birtwistle et al. 2025 mixes randomised and quasi-experimental studies and reports immediate tests only). Promoted from K59 on 2026-10-29 in the bold expansion Jonatan approved after four empty attack nights (26–29 Oct): new sharp claims in thin areas, each naming a comparison, a rough size or direction and a population.
Tutor consequence
none yet
Attack record
1 attack: 1 narrowed
2026-10-31 narrowed
Attack
A 2025 meta-analysis of 57 executive-function training studies in typically developing children found that 4- to 6-year-olds improved on literacy (g = 0.40) and numeracy (g = 0.39) tests right after training, not only on executive-function tests, so C29's flat statement that such training "does not raise learning-related or academic outcomes" is not established.
Target
claim-text
Source
Birtwistle, Chernikova, Wünsch & Niklas 2025 | SAGE Open 15(1), DOI 10.1177/21582440241311060 (full text read 2026-10-31 on the publisher's open-access page; Crossref-checked)
Steelmans to
C29's academic prong rests on one meta-analysis read only in its abstract (Scionti et al. 2020: "no significant extra effect"); a newer, larger meta-analysis covering the same age band and the same kind of stand-alone cognitive training reports positive academic estimates of about 0.4 SD for ages 4–6, near-and-far transfer not significantly different, and no sign of publication bias, so the most the evidence supports is that academic gains are unproven, not that they are absent.
Why
Nightly-attacks 2026-10-31 Europe/Stockholm. Full text: 57 published RCTs or quasi-experiments with a treated or untreated control and pre/post tests; typically developing children aged 3–14; at least 80 minutes of training; immediate post-tests only. Overall g = .23 (95% CI .09 to .37). Ages 4–6 (29 studies): near transfer g = 0.25 (p = .004), far transfer g = 0.34 (SE .15, p = .05, df = 11), literacy g = 0.40 (SE .09, p = .01, df = 4), numeracy g = 0.39 (SE .08, p = .003, df = 5), reasoning 0.33 (ns); I² = 84%; funnel, asymmetry test and p-curve showed no publication bias; type of control not a significant predictor. Kill withheld: C29's kill line asks for randomised trials, and this pool mixes in quasi-experiments; tests were immediate only; the age-band literacy and numeracy estimates rest on 4 and 5 degrees of freedom; far transfer for ages 4–6 was only marginal (p = .05). So the claim narrows from "does not raise" to "has not been shown to raise reliably". Not a duplicate (empty ledger before tonight); not a restatement (Bounds named no positive academic estimate). Not a preprint. Status alive → weakened. Claim field, Bounds and kill line rewritten in the same turn; brief and diagram core rewritten (C29 has no front-page rule).
Rewrite
claim-field+brief
Corrections to our notes
These fix a number or a fact in our notes. They are not attacks and do not count toward the floor of 3 survivals.
— Checked against the full text of the study: facts behind the "adjacent support" line.
— Limits and claim-text fact fix from the full text of Scionti et al. 2020, which C29 cited as "read only in its abstract".
Abstract: training one executive-function component in children gave near transfer g+ = 0.44 (k = 43) but no convincing transfer to untrained components, g+ = 0.11 (k = 17, p = .11). Age range not stated in the abstract; far transfer here is to other executive functions, not academic outcomes. Closed from the box.
Full text (2026-11-05): EF g = 0.352; non-EF outcomes (learning-related and behaviour pooled) g = 0.169, 95% CI −0.047 to 0.383, p = .122 (15 studies); academic outcomes not pooled separately.