This paper covers the main features of Martha Harris's development and consolidation of the psychoanalytic training founded on infant observation that she inherited from Esther Bick in 1960. In particular she instituted the work discussion group, personality development seminars, and the two-part training that also facilitated the dissemination of psychoanalytic knowledge into the wider community, through workers who would not necessarily train to become psychoanalysts themselves. Her distinctive principle was to encourage “self-selection”. She drew on various sources of personal experience—inspiring teachers (Klein, Bick, Bion), work in schools set up together with her husband Roland Harris,2 teaching and organizational skills, and above all, personal self-analytic awareness—being firmly convinced that a psychoanalytic attitude is useful in all emotional situations where infant conflicts are inevitably involved and, unless acknowledged and understood, are liable to undermine the work-group ethos.