The project ETSO: Estilometría aplicada al Teatro del Siglo de Oro arose from the interest of researcher Álvaro Cuéllar (Universitat Autònoma de Barcelona) and Professor Germán Vega García-Luengos (Universidad de Valladolid) in applying new computational tools to the many problems of authorship attribution posed by Spanish Golden Age theatre. The portal offers analyses that can help shed light on questions of attribution within the vast theatrical production of that period. Stylometry makes it possible, in one of its most useful applications, to identify the works whose lexical frequencies are closest to those of the text under study within the available corpus. Since every author uses words in different proportions, works often tend to cluster according to authorship. Nevertheless, caution is always necessary, because other similarities may arise from genre, subject matter, dating, provenance, textual condition or other factors.

Here you can consult examples in which stylometry supports the traditional attribution, such as La dama boba, Don Gil de las calzas verdes, El médico de su honra, as well as cases in which stylometry points to an unexpected and potentially revealing attribution, such as La francesa Laura, La monja alférez, La puerta Macarena (primera parte). The new attributions indicated here should be understood only as preliminary authorship clues produced by an automatic computational process. Each case must therefore be studied in detail from a philological perspective, taking its specific complexities into account.