Interactions with feedback at the trait level: direct and indirect genetic effects.

<p>Relative magnitude of direct (A) and indirect (B) genetic effects and their dependence on the strength of the interaction, for different numbers of individuals (two, six and ten individuals). Interaction as depicted in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0046273#pone-0046273-g001" target="_blank">Figure 1 C</a>, where is the strength of the interaction between trait X of the focal individual and the same trait in its social partner.