Shared home environment has little effect on intelligence variance

Evidence

By comparing these MZ-apart twins with monozygotic twins who had grown up together, Bouchard and his colleagues (1990) calculated that about 70% of the variance in intelligence was inherited. … Growing up in the same home seemed to have almost no effect. — Bob Altemeyer, The Authoritarian Specter, 887 (#corroborates, via linked claim)

Can a society which is incapable of protecting individual privacy even within one’s four walls rightfully claim that it respects the individual and that it is a free society? To be sure, a free society is defined by more, and by more fundamental achievements, than private autonomy. And yet, the absence of the latter vitiates even the most conspicuous institutions of economic and political freedom—by denying freedom at its hidden roots. Massive socialization begins at home and arrests the development of consciousness and conscience. The attainment of autonomy demands conditions in which the repressed dimensions of experience can come to life again; their liberation demands repression of the heteronomous needs and satisfactions which organize life in this society. The more they have become the individual’s own needs and satisfactions, the more would their repression appear to be an all but fatal deprivation. But precisely by virtue of this fatal character, it may create the primary subjective prerequisite for qualitative change—namely, the redefinition of needs. — Herbert Marcuse, One-Dimensional Man, 851 (#complicates, via linked claim)

Categorization

• XREF: connects to: Shared home environment has almost no effect on intelligence variance. — Bob Altemeyer, The Authoritarian Specter, 887; Intelligence develops from environment and experience rather than genetic inheritance; Massive socialization at home arrests consciousness and blocks autonomy’s hidden roots — Herbert Marcuse, One-Dimensional Man: Studies in the…, 851 (+2 more)

Broader Connections

• Shared home environment has almost no effect on intelligence variance. #corroborates (0.99) — Bob Altemeyer, The Authoritarian Specter, 887
• Intelligence develops from environment and experience rather than genetic inheritance #complicates (0.75)
• Massive socialization at home arrests consciousness and blocks autonomy’s hidden roots #complicates (0.72) — Herbert Marcuse, One-Dimensional Man, 851