title: Parkinson's disease: a reduced ability to shift to a new grouping if not prompted or guided.
authors.forename: A R
authors.initials: AR
authors.lastname: Cools
authors.forename: J H
authors.initials: JH
authors.lastname: van den Bercken
authors.forename: M W
authors.initials: MW
authors.lastname: Horstink
authors.forename: K P
authors.initials: KP
authors.lastname: van Spaendonck
authors.forename: H J
authors.initials: HJ
authors.lastname: Berger
mesh_terms: D006801:Humans; D009483:Neuropsychological Tests; D010300:Parkinson Disease / Q000503:physiopathology*; D011597:Psychomotor Performance / Q000502:physiology*