Donald W Nibbelink | Researchain

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Journal of Clinical Psychology | 1993

Factor structure and scoring of the SKT test battery

Yong S. Kim; Donald W Nibbelink; John E. Overall

The SKT (Syndrom Kurztest) has been used in the assessment of treatment responses in numerous clinical trials for treatment of dementia in German-speaking Europe. Data from 265 patients with mild to moderate Alzheimers disease in a study conducted in the U.S. were analyzed to evaluate factor structure, common and specific subtest content, reliability, and concurrent validity. Results confirm the presence of two primary factors of memory and attention. Test-retest reliability of the factor scores was estimated to be .75 and .93. Test-retest reliability of the composite SKT total score was .90. The correlations between the SKT memory and attention factor scores and the MMSE and ADAS measurements of dementia also support validity with regard to the broader construct of cognitive dysfunction.

European Neurology | 1997

Comparison of immediate-release and controlled release carbidopa/levodopa in Parkinson's Disease : A multicenter 5-year study

Gilbert A. Block; Charles Liss; Scott A. Reines; Joseph D. Irr; Donald W Nibbelink; Johan A. Aarli; Miquel Aguilar; Suzanne P. Ahrens; A. Bakheit; Barry Baumel; John M. Bertoni; Rudy Capildeo; Alexandre Castro-Caldas; Luis Deza; Ivan Donaldson; Georges Franck; Jose Fusillo; Serge Gauthier; Oscar Gershanik; Ann Katherine Granerus; Robert A. Hauser; Keven Hennessey; J. Thomas Hutton; Ronald Joffe; William C. Koller; Peter A. LeWitt; Bruno Mamoli; Bala Manyam; Margery H. Mark; Kenneth Nakano

European Neurology | 1997