A specific shifting deficit in Parkinson's disease: A reversal shift of consistent stimulus-response mappings

ShuLan Hsieh, Ya Yun Chuang, Wen Juh Hwang, Ming Chi Pai

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Two experiments were designed to investigate effects of cueing upon aptitude for shifting by patients with Parkinson's disease. Subjects executed in alternation two different components of a task set over successive items in a list. We compared the costs of shifting when the stimulus ensemble remained constant from trial to trial ("uniform" lists), with the case in which a change of stimulus ensemble cued each shift of task ("mixed" lists). Shift costs with mixed lists were significantly smaller than those with uniform lists (Exp. 1, ns=12). This suggests that patients with Parkinson's disease can benefit from cues about the stimulus ensemble in performing tasks. Patients' shifting performance was different from that of controls only in a reversal-shift condition of the previously consistent stimulus-response mappings (Exp. 2, ns= 12). This result suggests that patients with Parkinson's disease suffer from a specific but not a general deficit in ability to shift.

Original languageEnglish
Pages (from-to)1107-1119
Number of pages13
JournalPerceptual and Motor Skills
Volume87
Issue number3 PART 1
Publication statusPublished - 1998 Dec 1

All Science Journal Classification (ASJC) codes

  • Experimental and Cognitive Psychology
  • Sensory Systems

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