Evidence map›Paper›PMID 42646822›Full record

ArticleVision (Basel, Switzerland)2026

When Cronbach's Alpha Is Not Enough: Implications for the Clinical Use of Vision-Related Patient-Reported Outcomes.

Mario Cantó-Cerdán, María C Martínez-Hergueta, Ana Siverio-Colomina, Pilar Yébana-Rubio, Jorge Alió-Del-Barrio, Pilar Cacho-Martínez, Ángel García-Muñoz, Antonio Martínez-Abad

Abstract read
In one paragraph

Article in Vision (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing 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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

8 authors.

Mario Cantó-CerdánVissum (Miranza Group), 03016 Alicante, Spain.ORCID 0000-0003-0992-0877
María C Martínez-HerguetaVissum (Miranza Group), 03016 Alicante, Spain.ORCID 0000-0002-6817-6569
Ana Siverio-ColominaVissum (Miranza Group), 03016 Alicante, Spain.
Pilar Yébana-RubioVissum (Miranza Group), 03016 Alicante, Spain.
Jorge Alió-Del-BarrioVissum (Miranza Group), 03016 Alicante, Spain.ORCID 0000-0003-2666-3366
Pilar Cacho-MartínezGrupo de Investigación en Optometría (GIOptom), University of Alicante, 03690 Alicante, Spain.ORCID 0000-0003-2992-6467
Ángel García-MuñozGrupo de Investigación en Optometría (GIOptom), University of Alicante, 03690 Alicante, Spain.ORCID 0000-0003-3804-9048
Antonio Martínez-AbadVissum (Miranza Group), 03016 Alicante, Spain.ORCID 0000-0002-5684-1090

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Patient-reported outcome measures (PROMs) in vision science are commonly evaluated using Cronbach's alpha, yet Rasch-based statistics may provide different information about their reliability. This study compared Cronbach's alpha, a Classical Test Theory (CTT) index, with Rasch person reliability and the person separation ratio across three vision-related questionnaires: the Symptom Questionnaire for Visual Dysfunctions (SQVD;

Indexed as

classical test theoryCronbach’s alphameasurement reliabilitypatient-reported outcomesperson separation ratioRasch analysisvision

Identifiers

PMID42646822
PMCPMC13517947

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.