HARRY-assisted stories received more 'good' CHECK TEXT grammar and style reports than control stories in the case studies¶

Claim · All claims
Evidence · 1 study (2 entries) · causal r1 · q1
Currency · newest study 2004 · checked against its sources 2026-10-29 (automated, 2 of 2 entries) · not reviewed by a person

Subclaims¶

Reading the evidence codes

q is the design tier, i the impact, n the sample, and the kind with its r the rigour judged within that kind: what each code means.

This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.

q1 i? James' HARRY-assisted final draft earned two more 'good' CHECK TEXT reports than his control story. → C.E. Holdich 2004 q1 i? Sophie's HARRY-assisted final draft earned five more 'good' CHECK TEXT reports than her control story. → C.E. Holdich 2004 (2)

Evidence¶

C.E. Holdich 2004¶

C.E. Holdich, P.W.H. Chung and R.G. Holdich. (2004). Improving children's written grammar and style: revising and editing with HARRY. Computers & Education, Vol 42, pp1-23. https://creativecommons.org/licenses/by-nc-nd/2.5/

q1 · i? · causal · r1

Case study of James, one of four randomly selected 8/9-year-olds who each wrote a control story and a HARRY-assisted story on the same theme. The authors report that the "assisted story (final draft)" gained two more good reports than the control, with vocabulary (variety = 69%) and sentence-to-comma ratio (0.7) improved.

"CHECK TEXT recorded two more 'good' reports for the assisted story (final draft) than the control."

C.E. Holdich 2004 (2)¶

q1 · i? · causal · r1

Case study of Sophie, who wrote a control story and a HARRY-assisted story on the same theme; the article states "five more good reports" for the assisted final draft, with vocabulary choice (variety = 78%) improving and story length rising to 663 words.

"CHECK TEXT awarded Sophie's HARRY assisted story (final draft) five more good reports than her control story."

Discussion¶

HARRY's second-stage editing prompts improved James' sentence constructions, reducing 'and' overuse and improving vocabulary variety — a broader claim this one bears on
Editing suggestions restored but did not fully correct Sophie's punctuation: her final draft showed no improvement in full-stop use over control — related

Page metadata

Field	Value
`type`	`claim`
`id`	`harry-assisted-stories-more-good-check-text-reports`
`title`	`HARRY-assisted stories received more 'good' CHECK TEXT grammar and style reports than control stories in the case studies`
`description`	`HARRY-assisted stories received more 'good' CHECK TEXT grammar and style reports than control stories in the case studies`
`status`	`review`
`evidence_strength`	`weak`
`newest_evidence`	`2004`
`source_checked`	`2026-10-29`
`generated`	by `process:wiki-ingest` on `2026-10-29`
`trust`	unverified — no one has confirmed this page's content
`sources`	2 — `ce-holdich-2004`, `ce-holdich-2004-2`

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