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Double-headed curved arrows represent variances. The direct path is labeled “b” and the path from the A component is labeled “a.” rMZ = cross-twin family correlation in MZ families; rDZ = cross-twin family correlation in DZ families; Rpt = report; 1 = twin family 1 and 2 = twin family 2. Intercepts of the A, C, E, Family Functioning, and Child Functioning components were fixed equal to zero. Child Functioning consisted of children’s self-reports.
