This study focuses on the psychotherapeutic process of a group of children with learning difficulties. After preliminary examination of the vocabulary used by therapists and children during 29 videotaped sessions, the analysis focused on its pragmatic characteristics through the identification of speech acts and their categorization according to speech act type, content referred to, environment referred to, and means of expression used. Multivariate statistical analysis revealed important changes in the vocabulary and speech acts of children and therapists throughout the course of treatment, a result that contributes in an essential way to the understanding of the evolution of therapy.