Letter sound only instruction may interfere with letter name learning relative to incidental exposure¶

Claim · All claims
Evidence · 1 study · causal r2 · q2
Currency · newest study 2010 · not yet checked against its sources · 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.

q2 i? Children receiving letter sound only instruction performed worse on letter name measures than children in the treated control, which the authors interpret as possible confusion or interference from sound-only labels. → Piasta 2010

Evidence¶

Piasta 2010¶

Piasta, S. B., Purpura, D. J., & Wagner, R. K. (2010). Fostering Alphabet Knowledge Development: A Comparison of Two Instructional Approaches. Reading and Writing, 23(6), 607-626. https://doi.org/10.1007/s11145-009-9174-x

q2 · i? · causal · r2

Authors' interpretation of the experimental results: LS-only children "performed worse on letter name measures than children in the treated control", suggesting the sound-only labels may have caused confusion or interference in alphabet learning.

"The fact that children receiving letter sound only instruction performed worse on letter name measures than children in the treated control may support this interpretation."

Discussion¶

Learner Variables¶

Alphabet Knowledge and Print Awareness — outcome: instruction changes it

Combined letter name and sound instruction produced greater letter name production gains than letter sound only instruction in preschoolers — related
Combined letter name and sound instruction produced greater letter sound gains than number instruction, with a trend over letter sound only instruction — related
Current instruction affects previously learned knowledge (interference), calling into question the accuracy of any single assessment — a broader claim this one bears on
The Multimodal Interference Effect: mapping visual representations to physical concepts degrades LLM performance even on non-visual problem aspects — a broader claim this one bears on

Page metadata

Field	Value
`type`	`claim`
`id`	`ls-only-possible-letter-name-interference`
`title`	`Letter sound only instruction may interfere with letter name learning relative to incidental exposure`
`description`	`Letter sound only instruction may interfere with letter name learning relative to incidental exposure`
`status`	`review`
`evidence_strength`	`weak`
`newest_evidence`	`2010`
`generated`	by `process:wiki-ingest` on `2026-10-17`
`trust`	unverified — no one has confirmed this page's content
`sources`	1 — `piasta-2010`

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