Evidence map›Paper›PMID 25738626›Full record

ArticleNursing research

The problem with Cronbach's Alpha: comment on Sijtsma and van der Ark (2015).

Claudio Barbaranelli, Christopher S Lee, Ercole Vellone, Barbara Riegel

Abstract readComment
PubMed Full text at PMC Publisher
In one paragraph

Article in Nursing research. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed, 1 pooled it
–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

33 citing papers in PubMed, 1 synthesis or guideline pooled it.

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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors.

Claudio BarbaranelliClaudio Barbaranelli, PhD, is Professor, Department of Psychology, Sapienza University of Rome, Italy. Christopher S. Lee, PhD, RN, is Associate Professor, Schools of Nursing and Medicine, Oregon Health & Science University, Portland. Ercole Vellone, PhD, RN, is Research Fellow, Department of Biomedicine and Prevention, Tor Vergata University, Rome, Italy. Barbara Riegel, DNSc, RN, FAAN, FAHA, is Professor, School of Nursing, University of Pennsylvania, Philadelphia.
Christopher S Lee
Ercole Vellone
Barbara Riegel

Funding

Scholars in Women's Health Research Across the LifespanK12HD043488 · NICHD · OREGON HEALTH & SCIENCE UNIVERSITY · PI MYATT, LESLIE · 2002 to 2023
$10.4M
Impact of sleepiness on heart failure self-careR01HL084394 · NHLBI · UNIVERSITY OF PENNSYLVANIA · PI RIEGEL, BARBARA J · 2007 to 2009
$2.1M
NHLBI NIH HHS R01 HL084394NICHD NIH HHS K12 HD043488NICHD NIH HHS K12 HD043488-08
6 · The paper itself

Abstract

Knowledge of a scale's dimensionality is an essential preliminary step to the application of any measure of reliability derived from classical test theory--an approach commonly used is nursing research. The focus of this article is on the applied aspects of reliability and dimensionality testing. Throughout the article, the Self-Care of Heart Failure Index is used to exemplify real-world data challenges of quantifying reliability and to provide insight into how to overcome such challenges.

Indexed as

Models, StatisticalNursing ResearchReproducibility of ResultsHumans

Identifiers

PMID25738626
PMCPMC4351779

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.