Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/41702

TitleRepeated assessment and practice effects of the written symbol digit modalities test using a short inter-test interval
Author(s)Pereira, D. R.
Costa, Patrício
Cerqueira, João José
KeywordsSDMT
Practice effects
Repeated assessment
Test-retest reliability
Alternate forms
Issue date2015
PublisherOxford Univ Press
JournalArchives of Clinical Neuropsychology
CitationPereira, D. R., Costa, P., & Cerqueira, J. J. (2015). Repeated Assessment and Practice Effects of the Written Symbol Digit Modalities Test Using a Short Inter-Test Interval. Archives of Clinical Neuropsychology, 30(5), 424-434. doi: 10.1093/arclin/acv028
Abstract(s)The Symbol Digit Modalities Test (SDMT) is a widely used instrument to assess information processing speed, attention, visual scanning, and tracking. Considering that repeated evaluations are a common need in neuropsychological assessment routines, we explored test–retest reliability and practice effects of two alternate SDMT forms with a short inter-assessment interval. A total of 123 university students completed the written SDMT version in two different time points separated by a 150-min interval. Half of the participants accomplished the same form in both occasions, while the other half filled different forms. Overall, reasonable test–retest reliabilities were found (r = .70), and the subjects that completed the same form revealed significant practice effects (p < .001, dz = 1.61), which were almost non-existent in those filling different forms. These forms were found to be moderately reliable and to elicit a similar performance across participants, suggesting their utility in repeated cognitive assessments when brief inter-assessment intervals are required.
TypeArticle
URIhttp://hdl.handle.net/1822/41702
DOI10.1093/arclin/acv028
ISSN0887-6177
Publisher versionhttp://www.elsevier.com
Peer-Reviewedyes
AccessOpen access
Appears in Collections:ICVS - Artigos em Revistas Internacionais com Referee

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