Evidence map›Paper›PMID 24985476›Full record

ArticleInvestigative ophthalmology & visual science2014

The effect of aging on crowded letter recognition in the peripheral visual field.

Andrew T Astle, Alan J Blighe, Ben S Webb, Paul V McGraw

Open access · bronzeAbstract read
In one paragraph

Article in Investigative ophthalmology & visual science, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 1 pooled it
1.3field-weighted citation impact, top 21% 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

14 citing papers in PubMed, 1 synthesis or guideline pooled it, 20 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Article
  6. Review
  7. Article
  8. Visual Crowding in Glaucoma.Investigative ophthalmology & visual science · 2019
    Article
  9. Towards a whole brain model of Perceptual Learning.Current opinion in behavioral sciences · 2018
    Article
  10. Article
  11. Article
  12. Agnosic vision is like peripheral vision, which is limited by crowding.Cortex; a journal devoted to the study of the nervous system and behavior · 2017
    Article
  13. Rehabilitation Approaches in Macular Degeneration Patients.Frontiers in systems neuroscience · 2016
    Review
  14. 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

4 authors at 1 institution in 1 country.

Andrew T AstleVisual Neuroscience Group, School of Psychology, University of Nottingham, Nottingham, United Kingdom.
Alan J BligheVisual Neuroscience Group, School of Psychology, University of Nottingham, Nottingham, United Kingdom.
Ben S WebbVisual Neuroscience Group, School of Psychology, University of Nottingham, Nottingham, United Kingdom.
Paul V McGrawVisual Neuroscience Group, School of Psychology, University of Nottingham, Nottingham, United Kingdom.
University of Nottingham · GB

Funding

Department of Health PDF-2013-06-057Wellcome Trust
6 · The paper itself

Abstract

purposeCrowding describes the increased difficulty in identifying a target object when it is surrounded by nearby objects (flankers). A recent study investigated the effect of age on visual crowding and found equivocal results: Although crowded visual acuity was worse in older participants, crowding expressed as a ratio did not change with age. However, the spatial extent of crowding is a better index of crowding effects and remains unknown. In the present study, we used established psychophysical methods to characterize the effect of age on visual crowding (magnitude and extent) in a letter recognition task.

methodsLetter recognition thresholds were determined for three different flanker separations in 54 adults (aged 18-76 years) with normal vision. Additionally, the spatial extent of crowding was established by measuring spacing thresholds: the flanker-to-target separation required to produce a given reduction in performance. Uncrowded visual acuity, crowded visual acuity, and spacing thresholds were expressed as a function of age, avoiding arbitrary categorization of young and old participants.

resultsOur results showed that uncrowded and crowded visual acuities do not change significantly as a function of age. Furthermore, spacing thresholds did not change with age and approximated Bouma's law (half eccentricity).

conclusionsThese data show that crowding in adults is unaffected by senescence and provide additional evidence for distinct neural mechanisms mediating surround suppression and visual crowding, since the former shows a significant age effect. Finally, our data suggest that the well-documented age-related decline in peripheral reading ability is not due to age-related changes in visual crowding.

Indexed as

ReadingVisual FieldsAdolescentAdultAgedAgingFemaleHumansMaleMiddle AgedPattern Recognition, VisualPerceptual MaskingPsychophysicsReference ValuesSpace PerceptionVisual Acuityagingcritical spacingcrowdingreadingvisual acuity

Identifiers

PMID24985476
PMCPMC4132554
OpenAlexW2335181847

What OpenQuestion holds

Textmetadata
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.