Below-chance direction of effect judgments with decimals below one are not attributable to weak decimal computation skill¶
Claim · All claims
Evidence · 1 study · causalr2·q3
Currency · newest study 2017 · 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.
q3 i? Most students who correctly solved multiplication and division computation problems with decimals below one still erred on the parallel direction of effect judgments. → Lortie-Forgues 2017
Evidence¶
Lortie-Forgues 2017¶
Lortie-Forgues, Hugues and Siegler, Robert S (2017) Conceptual knowledge of decimal arithmetic. Journal of Educational Psychology. pp. 374-391. ISSN: 0022-0620. https://doi.org/10.1037/edu0000148
q3 · i? · causal · r2
In Study 1, computation accuracy was analyzed alongside direction of effect judgments; "Most students (14 of 19, 74%) who correctly solved both multiplication computation problems" with decimals below one still erred on both parallel direction of effect judgments (division: 9 of 14, 64%).
"Most students (14 of 19, 74%) who correctly solved both multiplication computation problems involving decimals below one were incorrect on both of the direction of effect judgments on parallel problems."
Discussion¶
Learner Variables¶
- Operations and Place Value — predictor: learners who differ on it differ in outcomes
Related Claims¶
- Below Chance Direction Of Effect Decimals Below One
- Decimal magnitude comparison accuracy is unrelated to direction of effect judgment accuracy, indicating the errors do not stem from poor access to decimal magnitudes — related
- Direction of effect judgments for multiplication of decimals below one are more accurate when one operand is a whole number than when both operands are decimals — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
direction-of-effect-errors-not-attributable-computation |
title |
Below-chance direction of effect judgments with decimals below one are not attributable to weak decimal computation skill |
description |
Below-chance direction of effect judgments with decimals below one are not attributable to weak decimal computation skill |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2017 |
generated |
by process:wiki-ingest on 2026-10-23 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — lortie-forgues-2017 |
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