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Participant characteristics for children (n = 40) who contributed both fMRI and behavioral data.
| Characteristic | 4-year-olds (n = 21) | 6-year-olds (n = 19) | Group differences |
|---|---|---|---|
| Age (years) | 4.51 | 6.48 | t(38) = −20.88, p < .001 |
| Gender (male %) | 33.3 | 26.3 | χ2(1, 40) = 0.23, p = .63 |
| IQ (mean, SD) | 113 (11.40) | 116 (14.14) | t(38) = −.797, p = .43 |
| Motion | |||
| Scrubbed scans (mean, SD) | 5.05 (5.58) | 4.74 (6.44) | t(38) = .16, p = .87 |
| Mean FD (mean, SD) | 0.19 (0.09) | 0.20 (0.12) | t(38) = −.23, p = .82 |
