  Strong field processes in the non-relativistic regime are insensitive to the
electron spin, i.e. the observables appear to be independent of this electron
property. This does not have to be the case for several active electrons where
Pauli principle may affect the their dynamics. We exemplify this statement
studying model atoms with three active electrons interacting with strong pulsed
radiation, using an ab-initio time-dependent Schr\"odinger equation on a grid.
In our restricted dimensionality model we are able, for the first time, to
analyse momenta correlations of the three outgoing electrons using Dalitz
plots. We show that significant differences are obtained between model Neon and
Nitrogen atoms. These differences are traced back to the different symmetries
of the electronic wavefunctions, and directly related to the different initial
state spin components.
