Two more in-press papers from Intelligence.

The first, Prokosch et al., finds a .39 correlation between their most g-loaded tests (Raven's Advanced Progressive) and body symmetry. Their explanation is that

A parsimonious explanation for our findings is that both neurodevelopmental stability (as manifest in general intelligence) and morphodevelopmental stability (as manifest in body symmetry) tap into an underlying general “fitness factor” (Miller, 2000a and Miller, 2000b). In factor-analytic terms, general fitness is superordinate to these two forms of developmental stability. The existence of this superordinate fitness factor may explain why general intelligence positively correlates with so many fitness-related biological traits such as health, longevity, and physical attractiveness (Jensen & Sinha, 1993; Whalley & Deary, 2001; Zebrowitz et al., 2002).

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