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. Author manuscript; available in PMC: 2009 Nov 6.
Published in final edited form as: Cogn Affect Behav Neurosci. 2009 Jun;9(2):144–152. doi: 10.3758/CABN.9.2.144

Table 3. Performance and differences between groups on EF tests.

Normal aging (n = 17) AD (n = 7) FTLD (n = 24)
Mean (SD) Mean (SD) Mean (SD) Test statistics
1. Working memory (working memory) 22.59 (3.16) 19.86 (3.98) 21.79 (5.08) ns
2. Stroop (inhibition; residualized) -7.09a (8.21) 22.53b (53.00) -1.55a (23.25) F(2,45) = 3.31, p < .05
3. Trail making (task switching; residualized) -8.01(42.76) 3.83 (50.13) 4.56 (46.85) ns
4. Verbal fluency (cognitive flexibility) 48.71a (8.30) 25.71b (11.76) 25.25b (11.90) F(2,45) = 26.27, p < .05.

Note. Scores on Stroop and Trail Making are residualized. Groups with different subscript differed from each other at p < .05 or below.