Behavioural Neurology / 2014 / Article / Tab 3

Clinical Study

Dopamine Treatment and Cognitive Functioning in Individuals with Parkinson’s Disease: The “Cognitive Flexibility” Hypothesis Seems to Work

Table 3

Subjects’ performance (average values) on the cognitive tests administered in the two experimental sessions.

Low performer PD patientsHigh performer PD patientsLow performer NCsHigh performer NCs
Off conditionOn conditionOff conditionOn conditionBlue sessionGreen sessionBlue sessionGreen session

Mean (SD)
Stroop test
Word reading
  Response times54.9 (13.6)58.1 (30.3)56.0 (15.2)54.4 (19.9)54.5 (21.5)49.3 (8.7)46.8 (9.7)48.0 (5.9)
  Accuracy99.7 (0.6)99.6 (0.9)100 (0.0)100 (0.0)99.7 (1.3)100.0 (0.0)99.8 (0.5)100 (0.0)
Naming colours
  Response times81.5 (18.4)95.7 (48.9)79.7 (12.9)86.0 (22.9)72.8 (20.5) 75.4 (16.8) 68.4 (17.4)65.8 (16.4)
  Accuracy99.2 (1.2)99.6 (2.4)99.4 (0.9)99.4 (0.8)99.4 (1.1)99.8 (0.4)99.6 (0.9)100 (0.0)
 Resistance to interference
  Response times187.6 (57.8)156.3 (55.0)126.1 (37.7)130.4 (53.2)133.9 (44.5) 139.9 (44.5)130.2 (53.1)120.4 (27.3)
  Accuracy91.9 (12.9)92.8 (13.2)98.4 (1.5)99.6 (0.8)97.7 (5.2)98.6 (2.3)98.2 (1.9)99.4 (0.9)
Fluency tests
 Phonemic25.8 (11.9)23.0 (8.7)29.6 (9.5)32.3 (9.0)32.1 (11.1)32.2 (8.1)33.2 (4.2)33.2 (6.9)
 Semantic33.0 (9.6)29.3 (8.6)33.7 (4.5)36.0 (9.3)35.4 (11.7)35.8 (5.6)38.6 (3.4)40.8 (1.6)
 Alternate phonemic/semantic19.1 (9.0)19.7 (8.3)24.6 (7.6)26.8 (11.2)28.0 (12.7)26.5 (9.6)33.6 (8.0)29.2 (6.1)

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