Evidence map›Paper›PMID 28811585›Full record

ArticleScientific reports2017

Age-related changes in crowding and reading speed.

Rong Liu, Bhavika N Patel, MiYoung Kwon

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed
2.2field-weighted citation impact, top 12% of its field
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

30 citing papers in PubMed, 52 citations in OpenAlex.

  1. Article
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  4. Review
  5. Age-Related Changes in Mesopic Reading Vision Across Adulthood.Investigative ophthalmology & visual science · 2025
    Article
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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

3 authors at 1 institution in 1 country.

Rong LiuDepartment of Ophthalmology, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA.
Bhavika N PatelDepartment of Ophthalmology, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA.
MiYoung KwonDepartment of Ophthalmology, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA. kwon@uab.edu.
University of Alabama at Birmingham · US

Funding

Perceptual mechanisms underlying reading difficulties in glaucomaR01EY027857 · NEI · UNIVERSITY OF ALABAMA AT BIRMINGHAM · PI KWON, MIYOUNG · 2017 to 2021
$1.8M
NEI NIH HHS R01 EY027857
6 · The paper itself

Abstract

Crowding, the inability to recognize objects in clutter, is known to play a role in developmental changes in reading speed. Here, we investigated whether crowding also plays a role in age-related changes in reading speed. We recruited 18 young (mean age: 22.6 ± 3.5; range: 18~31) and 21 older adults (mean age: 58.2 ± 7.0; range: 50~73) with normal vision. Reading speed was measured with short blocks of text. The degree of crowding was determined by measuring crowding zone (the distance between a target and flankers required to yield a criterion recognition accuracy) and the size of the visual span (an uncrowded window in the visual field within which letters can be recognizable reliably). Measurements were made across the central 16-degree visual field using letter-recognition tasks. Our results showed that, compared to young adults, older adults exhibited significantly slower reading speed (a decrease by 30%) and larger crowding: an enlargement of crowding zone (an increase by 31%) and shrinkage of the visual span (a decrease by 6.25 bits). We also observed significant correlations between reading speed and each of the crowding measures. Our results suggest that crowding increases with age. Age-related changes in crowding may in part explain slower reading in older adults.

Indexed as

Pattern Recognition, VisualReadingAdolescentAdultAgedAged, 80 and overAge FactorsAgingFemaleHumansMaleMiddle AgedPsychophysicsVisual AcuityVisual FieldsYoung Adult

Identifiers

PMID28811585
PMCPMC5557829
OpenAlexW2744260853

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.