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. Author manuscript; available in PMC: 2012 Jun 1.
Published in final edited form as: Neurobiol Aging. 2009 Jun 25;32(6):1124–1137. doi: 10.1016/j.neurobiolaging.2009.05.015

Table 4.

Speed of processing in working memory (n-back tasks): Summary of results.

Effect df F-Ratio Partial η2 p-Value
Between Subjects Error df = 143
Age 1 59.76 0.295 0.00000
Age2 1 3.56 0.050 0.061
Sex 1 9.79 0.064 0.002
comt 2 1.73 0.024 0.181
ace 2 1.30 0.018 0.276
Pulse Pressure 1 0.25 0.002 0.618
ace × comt 4 1.20 0.008 0.314
Sex × Age 1 5.79 0.039 0.017
Sex × Age2 1 6.89 0.046 0.010
Within Subjects Error df = 143
Task 1 795.63 0.847 0.00000
Task × Age 1 3.46 0.023 0.065
Within Subjects Error df = 286
Load 2 236.36 0.623 0.00000
Load × Age 2 5.27 0.035 0.010
Load × Sex 2 3.99 0.042 0.028
Load × ace 4 2.25 0.030 0.079
Load × ace × comt 8 3.86 0. 097 0.0008
Within Subjects Error df = 286
Task × Load 2 16.17 0.101 0.00000
Task × Load × Age 2 4.11 0.028 0.026
Task × Load × ace × comt 8 1.90 0.050 0.078

Note. Non-significant interactions (p > 0.12) were removed from the models.