The commentary deals with multiplicity vs unity in psychology, contrasting the compartmentalization of psychology as several different disciplines.
The problem has significant repercussions on the professional level, given that the psychologist under Italian law is authorized to work in all fields of the psychological profession, except psychotherapy for which specialist training is required. Possible unifying criteria, epistemology and methods common to the entire psychological science are sought. The applicative aspects for training, in light of the new norms on the qualifying degree in psychology, are discussed.