Refractive Status and Vision Profile: evaluation of psychometric properties and comparison of Rasch and summated Likert-scaling. [Post-print]
| dc.contributor.author | Garamendi, Estibaliz | |
| dc.contributor.author | Pesudovs, Konrad | |
| dc.contributor.author | Stevens, Michael J | |
| dc.contributor.author | Elliott, David B | |
| dc.date.accessioned | 2006-08-24T05:49:51Z | |
| dc.date.available | 2006-08-24T05:49:51Z | |
| dc.date.issued | 2006-04 | |
| dc.description.abstract | The psychometric properties of the Refractive Status and Vision Profile (RSVP) questionnaire were evaluated using Rasch analysis. Ninety-one myopic patients from a refractive surgery clinic and general optometric practice completed the RSVP. Rasch analysis of the RSVP ordinal data was performed to examine for unidimensionality and item reduction. The traditional Likert-scoring system was compared with a Rasch-scored RSVP and a reduced item Rasch-scored RSVP. Rasch analysis of the original RSVP showed poor targeting of item difficulty to patient quality of life, items with a ceiling effect and underutilized response categories. Combining the underutilized response scales and removal of redundant and misfitting items improved the internal consistency and targeting of the RSVP, and the reduced 20-item Rasch scored RSVP showed greater relative precision over standard Likert scoring in discriminating between the two subject groups. A Rasch scaled quality of life questionnaire is recommended for use in refractive outcomes research. | en |
| dc.format.extent | 193039 bytes | |
| dc.format.mimetype | application/pdf | |
| dc.identifier.citation | Garamendi E., Pesudovs K., Stevens M J, Elliott DB. 2006. The Refractive Status and Vision Profile: evaluation of psychometric properties and comparison of Rasch and summated Likert-scaling. 'Vision Research'. Vol 46, Nos. 8-9, 1375-83. | en |
| dc.identifier.issn | 0042-6989 | |
| dc.identifier.uri | http://hdl.handle.net/2328/1141 | |
| dc.language.iso | en | |
| dc.oaire.license.condition.license | In Copyright | |
| dc.publisher | Elsevier | en |
| dc.subject | Myopia | en |
| dc.subject | Refractive Errors | en |
| dc.subject | Sickness Impact Profile | en |
| dc.subject.other | Australian Research Classification 321016 Ophthalmology and Vision Science | en |
| dc.title | Refractive Status and Vision Profile: evaluation of psychometric properties and comparison of Rasch and summated Likert-scaling. [Post-print] | en |
| dc.type | Preprint | en |