  We argue that the $ZZH$ coupling constitutes a simple probe of the nature of
the scalar sector responsible for electroweak symmetry breaking. We demonstrate
the efficacy of this measure through an analysis of four-dimensional models
containing scalars in arbitrary representation of $SU(2) \times U(1)$, as well
as extra-dimensional models with a non-factorizable geometry. A possible role
for the $t \bar t H$ couplings is also discussed.
