Sociology progresses through the joint advancement of both theory and
methodology. The diversity of its theoretical approaches is mirrored b
y the diversity of its methodologies. There has been a disappearance o
r loss of pertinence of the distinction between 'quantitative' and 'qu
alitative' methodologies. Perhaps a more constructive distinction is t
hat between 'ascending' and 'descending' methodologies, noting however
that these are complementary and may be combined in a single research
project. All methodologies have a 'non universal' character even thou
gh each has its particular domain of comptence and pertinence. Multi-m
ethod analysis is valuable in obtaining stable results and opening up
communications between subdisciplines. A general sociological research
procedure is presented in four 'classic' points to which two often un
explicited basic steps are added: the initial transformation and the f
inal transformation of information during research procedure.