TABLE IV.
Heritability Estimates for Cognitive Data
| Traits | N | Heritability estimate | Std. error | P | Age | Sex | Age × sex |
|---|---|---|---|---|---|---|---|
| Vocabulary | 85 | 0.7827 | 0.258 | 0.016* | 0.983 | 0.864 | 0.987 |
| Similarities | 85 | 0.8969 | 0.2215 | 0.012* | 0.983 | 0.761 | 0.958 |
| Information | 85 | 0.9367 | 0.2553 | 0.012* | 0.999 | 0.628 | 0.987 |
| Block Design | 69 | 0.7314 | 0.3039 | 0.035* | 0.983 | 0.478 | 0.888 |
| Matrix Reasoning | 86 | 0.1531 | 0.3487 | 0.470 | 0.999 | 0.864 | 0.888 |
| Digits Forward | 85 | 0 | — | 0.500 | 0.983 | 0.628 | 0.888 |
| Digits Back | 85 | 0 | — | 0.500 | 0.921 | 0.817 | 0.888 |
| Digit Span | 85 | 0 | — | 0.500 | 0.999 | 0.864 | 0.981 |
| LN Sequencing | 84 | 0.0073 | 0.3224 | 0.500 | 0.983 | 0.817 | 0.888 |
| Digit Symbol | 72 | 0.8749 | 0.2442 | 0.012* | 0.999 | 0.874 | 0.958 |
| WRAT Reading | 85 | 0.5879 | 0.2571 | 0.035* | 0.999 | 0.864 | 0.888 |
| WRAT Spelling | 86 | 0.6056 | 0.4786 | 0.230 | 0.282 | 0.478 | 0.888 |
| WRAT Arithmetic | 86 | 0.7924 | 0.3071 | 0.035* | 0.999 | 0.864 | 0.958 |
| CVLT 1–5 Total | 86 | 0.3542 | 0.2482 | 0.124 | 0.999 | 0.864 | 0.992 |
| CVLT Immediate | 86 | 0.4971 | 0.2541 | 0.043* | 0.999 | 0.817 | 0.968 |
| CVLT Delayed | 86 | 0.7301 | 0.2653 | 0.019* | 0.999 | 0.668 | 0.888 |
| CVLT Recognition | 86 | 0.2465 | 0.2849 | 0.296 | 0.999 | 0.478 | 0.968 |
| Verbal Pairs Immediate | 84 | 0.6171 | 0.2728 | 0.031* | 0.999 | 0.864 | 0.958 |
| Verbal Pairs Delayed | 84 | 0.3830 | 0.2475 | 0.104 | 0.983 | 0.801 | 0.968 |
| Visual Memory Immediate | 83 | 0.7402 | 0.2671 | 0.019* | 0.999 | 0.817 | 0.888 |
| Visual Memory Delayed | 82 | 0.5877 | 0.2652 | 0.035* | 0.983 | 0.973 | 0.888 |
| Boston Naming | 83 | 0.7900 | 0.2760 | 0.019* | 0.983 | 0.864 | 0.888 |
| PPVT | 85 | 0.8299 | 0.2661 | 0.016* | 0.999 | 0.628 | 0.958 |
| COWA Total | 84 | 0.1734 | 0.2773 | 0.391 | 0.983 | 0.864 | 0.888 |
| Stroop Interference | 81 | 0.7453 | 0.3003 | 0.035* | 0.983 | 0.618 | 0.888 |
| Trails A Raw | 85 | 0.3732 | 0.2710 | 0.130 | 0.983 | 0.864 | 0.987 |
| Trails A Percentile | 59 | 0 | 0.3437 | 0.500 | 0.999 | 0.550 | 0.958 |
| Trails B Raw | 81 | 0 | — | 0.500 | 0.983 | 0.864 | 0.958 |
| Trails B Percentile | 53 | 0.2335 | 0.4915 | 0.466 | 0.999 | 0.864 | 0.981 |
| Tapping Dominant Raw | 82 | 0.0662 | 0.1954 | 0.470 | 0.282 | 0.628 | 0.888 |
| Tapping Dominant Percentile | 69 | 0 | — | 0.500 | 0.517 | 0.511 | 0.888 |
| Tapping Non-Dominant Raw | 79 | 0.0142 | 0.1905 | 0.500 | 0.999 | 0.550 | 0.888 |
| Tapping Non-Dominant Percentile | 69 | 0.0162 | 0.2819 | 0.500 | 0.983 | 0.817 | 0.888 |
| Pegboard Right Raw | 89 | 0.7349 | 0.2704 | 0.019* | 0.983 | 0.047* | 0.968 |
| Pegboard Right Percentile | 75 | 0.7260 | 0.2617 | 0.026* | 0.983 | 0.118 | 0.987 |
| Pegboard Left Raw | 90 | 0.4721 | 0.2397 | 0.043* | 0.983 | 0.478 | 0.958 |
| Pegboard both Raw | 89 | 0.3473 | 0.2578 | 0.131 | 0.999 | 0.603 | 0.888 |
| Pegboard Assemblies Raw | 87 | 1 | — | 0.012* | 0.999 | 0.864 | 0.888 |
| Laterality | 87 | 0 | — | 0.500 | 0.999 | 0.674 | 0.888 |
| Factor 1: “g” | 48 | 0.9826 | 0.3642 | 0.035* | 0.999 | 0.723 | 0.888 |
| Factor 2: Verbal Memory | 48 | 0.8085 | 0.3439 | 0.035* | 0.999 | 0.817 | 0.888 |
| Factor 3: WM | 48 | 0.1364 | 0.3662 | 0.470 | 0.999 | 0.864 | 0.888 |
| Factor 4: Visual Memory | 48 | 1 | — | 0.035* | 0.999 | 0.864 | 0.888 |
| Factor 5: Speed | 48 | 0.1025 | 0.295 | 0.470 | 0.983 | 0.894 | 0.888 |
| Factor 6: Inhibition | 48 | 1 | — | 0.040* | 0.999 | 0.511 | 0.888 |
| Factor 7: Laterality | 48 | 0 | — | 0.500 | 0.501 | 0.663 | 0.888 |
| Factor 8: Motor | 48 | 0.3401 | 0.3739 | 0.274 | 0.983 | 0.577 | 0.958 |
*
P<0.05.