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Family Relationships And Sibling Intelligence

Table 6:

Predictors IQ (elder sibling)
R R2 F p
Model 1 .19 .03 .75 .52
Control variables a
Model 2 .52 .24 3.84 .00
Sibling age gap ‒.02 .83
First child sex ‒.02 .87
Second child sex .06 .62
Paternal Control ‒.23 .05
Maternal Control ‒.30 .01
Dominance ‒.31 .01
Total R2 .27
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