A description of the microstructure of interpersonal processes is deve
loped, based on the analysis of interaction as a succession of reflexi
ve triadic units. This account can be modified in some aspects so as t
o provide a detailed theory of the process of dementia care. The theor
y is particularly relevant to moderate and severe dementia, and to for
mal care settings. A key concept is that of facilitation. The idea of
a 'culture of dementia' is explored. Cautiously optimistic conclusions
are reached about the possibilities for enabling dementia sufferers t
o remain in a state of relative well-being.