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Titolo:
Modeling logMAR visual acuity scores: Effects of termination rules and alternative forced-choice options
Autore:
Carkeet, A;
Indirizzi:
Eye Res Inst, Singapore 168751, Singapore Eye Res Inst Singapore Singapore 168751 nst, Singapore 168751, Singapore
Titolo Testata:
OPTOMETRY AND VISION SCIENCE
fascicolo: 7, volume: 78, anno: 2001,
pagine: 529 - 538
SICI:
1040-5488(200107)78:7<529:MLVASE>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHART; REPEATABILITY; AGE;
Keywords:
visual acuity; modeling; alternative forced choice; termination rules;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Carkeet, A Eye Res Inst, 11 3rd Hosp Ave, Singapore 168751, Singapore Eye Res Inst 11 3rd Hosp Ave Singapore Singapore 168751 gapore
Citazione:
A. Carkeet, "Modeling logMAR visual acuity scores: Effects of termination rules and alternative forced-choice options", OPT VIS SCI, 78(7), 2001, pp. 529-538

Abstract

Background. Logarithm of the minimum angle of resolution (logMAR) charts come in a variety of alternative forced-choice (AFC) formats and can be usedwith a variety of different rules to determine when to stop a subject reading down a chart (termination rules). Methods. Exact calculation and Monte Carlo simulation techniques were used to compare logMAR scores for different termination rules and for infinite-, 26-, 10-, 8-, 4-, and 2-AFC logMAR chart formats. Slope-corrected standard deviation, an index of variability of the underlying ideal threshold, was used as a common metric for the different test conditions. Results. The mean and standard deviation of logMAR scores can be significantly affected by termination rules and AFC format. Fordifferent AFC formats, different termination criteria were found to give optimal slope-corrected standard deviations. Conclusion. A number of clinically suitable termination rules are proposed for different AFC format logMARcharts. For letter-by-letter scoring of Bailey-Lovie and EDTRS charts, it is recommended that researchers and practitioners use a termination rule ofstopping after four or more mistakes on a line.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/04/20 alle ore 22:49:38