Model Independence and Relativistic Spin Effects in the Nucleon

The effect of different forms of relativistic spin coupling of constituent quarks on the nucleon electromagnetic properties is studied. The correlations between the static observables are independent of the shape of momentum part of the nucleon light-front wave function. The neutron charge form factor also depends on different choices of spin coupling schemes, for a given magnetic moment. The scalar quark pair is preferred by the neutron charge form factor data for momentum transfers below 1 (GeV/c)², independent of the shape of the wave function.