Table 1.
Descriptive statistics for the source memory, language, and EF tasks as a function of age.
| 6-year-olds |
8-year-olds |
t | p | d | |||||
|---|---|---|---|---|---|---|---|---|---|
| M | SD | n | M | SD | n | ||||
| Fact recall | .61 | .15 | 35 | .86 | .11 | 37 | −7.81 | <.001 | 1.91 |
| Fact knowledge | .89 | .11 | 35 | .99 | .03 | 37 | −4.97 | <.001 | 1.26 |
| Source recall | .57 | .19 | 35 | .63 | .16 | 37 | −1.47 | .15 | .34 |
| Intraexperimental error | .31 | .15 | 34 | .34 | .12 | 35 | −.88 | .38 | .22 |
| False alarms | .38 | .35 | 20 | .22 | .25 | 13 | 1.43 | .16 | .51 |
| Forward digit | 4.94 | .80 | 35 | 5.42 | .87 | 36 | −2.34 | .02 | .57 |
| Backward digit | 2.68 | .68 | 34 | 3.94 | .98 | 36 | −6.23 | <.001 | 1.49 |
| Stroop interference | 206.35 | 631.77 | 35 | 53.82 | 604.32 | 37 | −1.05 | .30 | .25 |
| EVT | 70.57 | 9.53 | 35 | 89.22 | 13.42 | 37 | −6.76 | <.001 | 1.59 |
Note: All values for the source memory measures represent mean proportions. Forward and Backward Digit Span values represent highest span achieved. For the Stroop task (measured in RT), higher values represent a greater interference score.