Hsieh, S Set-shifting aptitude in Parkinson's disease: external versus internal cues. [electronic resource] - Psychological reports Aug 1995 - 339-49 p. digital Publication Type: Journal Article ISSN: 0033-2941 Standard No.: 10.2466/pr0.1995.77.1.339 doi Subjects--Topical Terms: AgedAptitudeAttentionBrain Damage, Chronic--psychologyDiscrimination LearningFemaleHumansInternal-External ControlMaleMiddle AgedNeuropsychological TestsParkinson Disease--psychologyPattern Recognition, VisualSet, Psychology