Reference Data for the Ruff Figural Fluency Test Stratified by Age and Educational Level

• Gerbrand J. Izaks ,

  * E-mail: g.j.izaks@int.umcg.nl

  Affiliations University Center for Geriatric Medicine, University Medical Center Groningen, Groningen, The Netherlands, Alzheimer Center Groningen, University Medical Center Groningen, Groningen, The Netherlands, Graduate School of Medical Sciences, University of Groningen, Groningen, The Netherlands

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• Hanneke Joosten,

  Affiliations University Center for Geriatric Medicine, University Medical Center Groningen, Groningen, The Netherlands, Department of Nephrology, University Medical Center Groningen, Groningen, The Netherlands, Graduate School of Medical Sciences, University of Groningen, Groningen, The Netherlands

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• Janneke Koerts,

  Affiliation Department of Clinical and Developmental Neuropsychology, University of Groningen, Groningen, The Netherlands

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• Ron T. Gansevoort,

  Affiliations Department of Nephrology, University Medical Center Groningen, Groningen, The Netherlands, Graduate School of Medical Sciences, University of Groningen, Groningen, The Netherlands

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• Joris P. Slaets

  Affiliations University Center for Geriatric Medicine, University Medical Center Groningen, Groningen, The Netherlands, Alzheimer Center Groningen, University Medical Center Groningen, Groningen, The Netherlands, Graduate School of Medical Sciences, University of Groningen, Groningen, The Netherlands

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