Table 1.

Age effects on mean univariate and spread of multivariate action effects

ExperimentMeasure/ROIAge effectLinearQuadratic
F (R2)pt (β)pt (β)p
SensorimotorUnivariate meanContralateral31.7 (5.29)<0.0001−7.95 (−7.5)<0.0001−0.3 (−0.29)0.76
Ipsilateral18.2 (2.89)<0.00015.26 (1.22)<0.0001−3.11 (−0.72)0.002
Multivariate spreadContralateral4.82 (0.81)0.0082.31 (0.008)0.021−2.08 (−0.007)0.038
Ipsilateral2.97 (0.49)0.052
Free selectionUnivariate meanContralateral4.49 (5.29)0.0141.88 (1.34)0.067−2.32 (−1.6)0.025
Ipsilateral9.31 (10.2)0.00023.66 (1.68)0.00040.900 (−1)0.032
Multivariate spreadContralateral2.83 (3.24)0.065
Ipsilateral2.02 (2.56)0.14
  • Effect sizes for the total age effect (linear and quadratic) and for the linear/quadratic effects separately are expressed as the proportion of explained variance (R2), as a percentage, and as standardized regression coefficients (β), respectively. Degrees of freedom in experiment 1: age effect F(2,583) and t(583); experiment 2: Age F(2,78) and t(78). Boldface indicates p < 0.05.