Evidence map›Paper›PMID 23997545›Full record

ArticleLearning and individual differences2013

A multivariate twin study of early literacy in Japanese Kana.

Keiko K Fujisawa, Sally J Wadsworth, Shinichiro Kakihana, Richard K Olson, John C Defries, Brian Byrne, Juko Ando

Abstract read
In one paragraph

Article in Learning and individual differences, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Keiko K FujisawaDepartment of Education, Faculty of Letters, Keio University.
Sally J Wadsworth
Shinichiro Kakihana
Richard K Olson
John C Defries
Brian Byrne
Juko Ando

Funding

VALIDITY OF SUBTYPES OF ADHDP50HD027802 · NICHD · UNIVERSITY OF COLORADO AT BOULDER · PI ERIK G WILLCUTT · 1990 to 2026
$44.9M
Longitudinal Twin Study of Early Reading Development (supplement)R01HD038526 · NICHD · UNIVERSITY OF COLORADO AT BOULDER · PI OLSON, RICHARD K · 2000 to 2010
$4.2M
NICHD NIH HHS P50 HD027802NICHD NIH HHS R01 HD038526
6 · The paper itself

Abstract

This first Japanese twin study of early literacy development investigated the extent to which genetic and environmental factors influence individual differences in prereading skills in 238 pairs of twins at 42 months of age. Twin pairs were individually tested on measures of phonological awareness,

Indexed as

behavioral geneticsearly literacyJapanese Kana syllabary

Identifiers

PMID23997545
PMCPMC3753202

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.