Exploring the Dimensionality of Digit Span

Autor/inn/en	Bowden, Stephen C.; Petrauskas, Vilija M.; Bardenhagen, Fiona J.; Meade, Catherine E.; Simpson, Leonie C.
Titel	Exploring the Dimensionality of Digit Span
Quelle	In: Assessment, 20 (2013) 2, S.188-198 (11 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1073-1911
DOI	10.1177/1073191112457016
Schlagwörter	Short Term Memory; Cognitive Tests; Factor Analysis; Correlation; Test Items; Difficulty Level; Neurological Impairments; Seizures; Patients; Regression (Statistics); Foreign Countries; Cognitive Ability; Australia; Wechsler Memory Scale + Suchen Sie Ihr Suchwort? Kurzzeitgedächtnis; Kognitiver Fähigkeitstest; Faktorenanalyse; Korrelation; Test content; Testaufgabe; Schwierigkeitsgrad; Neurodegenerative Erkrankung; Anfallsleiden; Patient; Regression; Regressionsanalyse; Ausland; Denkfähigkeit; Australien
Abstract	The Digit Span subtest from the Wechsler Scales is used to measure Freedom from Distractibility or Working Memory. Some published research suggests that Digit Span forward should be interpreted differently from Digit Span backward. The present study explored the dimensionality of the Wechsler Memory Scale-III Digit Span (forward and backward) items in a sample of heterogeneous neuroscience patients ("n" = 267) using confirmatory factor analysis (CFA) for dichotomous items. Results suggested that four correlated factors underlie Digit Span, reflecting easy and hard items in both forward and backward presentation orders. The model for Digit Span was then cross-validated in a seizure disorders sample ("n" = 223) by replication of the CFA and by examination of measurement invariance. Measurement invariance tests of the precise numerical generalization of trait estimation across groups. Results supported measurement invariance and it was concluded that forward and backward digit span scores should be interpreted as measures of the same cognitive ability. (Contains 6 tables.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10