  Perovskite oxide ferroelectrics show classical soft mode behaviour typical
for the onset of a homogeneous long-range polar state and a displacive phase
transition. Besides these long wave length properties, local effects are
observed by different probes which reveal that dynamical symmetry breaking
already takes place already far above the actual instability. It is shown here
that displacive mean-field type dynamics can indeed coexist with local
dynamical symmetry breaking.
