By analysing switching current data i(t), produced by the reversal
of domains, it was possible to extract detailed information concerning the
behaviour of the switching kinetics in TGS crystals. The switching curves were
fitted to a three-parameter nucleation and growth model based on Avrami
statistical theory. By direct observation of the domain pattern during slow
polarization reversal, by means of nematic liquid crystals, it was possible to
verify the assumptions of the theory for crystal samples with both a spatially
uniform and non-uniform distribution of domain nuclei.