Fittings and likelihood of various models tested.

Percent signal changes in L. F3op/F3t and L. SMG were fitted with a single scale parameter to a model of each factor using its subtracted estimates (Table 1) for the four contrasts of Nested’(L), Nested’(S), Simple’(L), and Simple’(S). The P values for the t-tests are shown in ascending order. Note that the models of DoM and “DoM+number of Search” (with an asterisk) resulted in the best fit for L. F3op/F3t and L. SMG, respectively, i.e., with the least residual sum of squares (RSS), largest coefficient of determination (r2), and larger P values. The likelihood of models with all null estimates was incalculable (n/a). A likelihood ratio is the ratio of each model’s likelihood to the best model’s likelihood. The best models of DoM and “DoM+number of Search” for L. F3op/F3t and L. SMG, respectively, were by far more likely than the other models.