Table 3.
(A) Mean percent and SD of partially explained variance by each predictor from multiple regressions on reaction times run on the single-subject level for all tasks, as well as addition and multiplication tasks. (B) Mean and SD of predictor correlations from multiple regressions on the single-subject level run for all tasks, as well as addition and multiplication tasks. (C) Mean and SD of the Variance Inflation Factor (VIF) from multiple regressions on the single-subject level run for all tasks, as well as addition and multiplication tasks.
| (A) Partial R2 Coefficients | ||||
|---|---|---|---|---|
|
Strategy |
Sum of operands |
|||
| Mean | SD | Mean | SD | |
| All Tasks | 0.13 | 0.08 | 0.09 | 0.04 |
| Addition | 0.23 | 0.12 | 0.10 | 0.08 |
| Multiplication | 0.22 | 0.15 | 0.17 | 0.09 |
|
Strategy |
Product of operands |
|||
| Mean | SD | Mean | SD | |
| All Tasks | 0.16 | 0.08 | 0.11 | 0.04 |
| Addition | 0.29 | 0.12 | 0.09 | 0.08 |
| Multiplication | 0.25 | 0.14 | 0.27 | 0.10 |
| (B) Correlations of Predictors | ||||
|
Sum of operands ∗ Strategy |
Product of operands ∗ Strategy |
|||
| Mean | SD | Mean | SD | |
| All tasks | 0.66 | 0.07 | 0.59 | 0.06 |
| Addition | 0.62 | 0.07 | 0.53 | 0.07 |
| Multiplication | 0.74 | 0.07 | 0.68 | 0.09 |
| (C) Variance Inflation Factor (VIF) | ||||
|
Sum of operands vs. Strategy |
Product of operands vs. Strategy |
|||
| Mean | SD | Mean | SD | |
| All Tasks | 1.90 | 0.31 | 1.58 | 0.18 |
| Addition | 1.70 | 0.26 | 1.41 | 0.16 |
| Multiplication | 2.45 | 0.75 | 2.03 | 0.49 |