. Author manuscript; available in PMC: 2023 Jan 4.

Published in final edited form as: Child Dev. 2021 Nov 11;93(1):e47–e58. doi: 10.1111/cdev.13675

TABLE 4.

Biometric results: within-person sensitivity to the Flynn Effect

Measure	ICC MZ	ICC DZ	A	C	E
FSIQ	.90 (.06)^***	.58 (.10)^***	0.64 (0.22)^**	0.26 (0.20)	0.10 (0.06)
VIQ	.83 (.05)^***	.59 (.08)^***	0.48 (0.18)^**	0.35 (0.17)^*	0.17 (0.05)^**
PIQ	.93 (.13)^***	.70 (.19)^***	0.45 (0.42)	0.48 (0.38)	0.08 (0.13)

Note: As presented, standardized ACE estimates do not all sum exactly to 1 due to rounding. Presented as estimate (SE).

Abbreviations: A, standardized additive genetic variance; C, shared environmental variance; DZ, dizygotic; E, nonshared environmental variance; FSIQ, full scale IQ; ICC, intraclass correlation; MZ, monozygotic; PIQ, performance IQ; VIQ, verbal IQ.

p < .05.

^**

p < .01.

^***

p < .001.