[en] This study aims to identify and analyse all the doctoral theses defended in Spain that refer to the concept of "internal communication" (hereinafter IC) over a period of 34 years from 1986 to 2019 (including both). It should be noted that not all of them are specialized in IC, but that some of them refer to the concept in some way. For this purpose, a descriptive and retrospective bibliometric analysis has been used, divided into three phases: 1) Search and identification in Dialnet Plus and TESEO; 2) Analysis of a total of (n= 81) theses; 3) Graphic representation with RStudio of the relationships between advisers and chairmen of the tribunal. For this, 30 variables distributed in three dimensions (work, research team and evaluation team) have been used. 32 universities are present (85,2% of them are state owned), of which the UCM (22,2%) is the most productive, followed by the UNAV, the ULL and the UAB (all with 6,2% each). If we analyse the origin of the theses by autonomous xommunities, Madrid (28,4%), Catalonia (14,8%) and Andalusia (12,3%) are in the lead. The most prolific decade is 2010-2019 (56,8%), especially 2016 with 12,3% and in terms of languages, the theses have been presented mainly in Spanish (92,6%), with English being almost anecdotal (3,7%). Its authorship is divided close to parity with 50,6% of women and 49,4% of men. It should be noted that there is individualism in management with 71,6% of sole advisers and an average of 1.3 advisers per thesis. In addition, there is a strong dispersion of advisers and a minimal relationship with chairpeople, as only 5,1% have repeated in the management and among them, only on one occasion, they have coincided with the same chairman. It is relevant to mention that 70,4% of the first advisers are men and 80% of the professionals who have occupied this function more than once are also men. In terms of the composition of the boards, the chairmen (76,5%), the secretaries (60,5%) and the male members (71%) are the most important, and once again the UCM is the university with the greatest presence. As might be expected, the terms most used in the theses´ titles revolve around "communication" and "internal" with 82,7% and 50,6% respectively. Among the descriptors, "communication" decreases to 49,4% (although it is still the most repeated) but "internal" disappears completely. There is evidence of a great diversity of items in both questions, although it is important to emphasize the use of concepts such as "strategy", "information", "influence" or "behaviour" that demonstrate the direct link between IC and public relations. By way of conclusion, it can be stated that the production of theses on internal communication in Spain has experienced a boom in the last decade thanks to state owned universities and with the UCM as the main creative and evaluative entity. Among the academics of the discipline, the figure of Alfonso-Javier Fernández-del-Moral, professor at the UCM, stands out, with two theses supervised and seven evaluation panels (five presidencies, a secretariat and a membership). Although there are no gender differences in terms of their origin, it is evident both in the management and in the tribunals, where men take especial presence. There is also the almost inexistent connection between advisers and members of the boards, and among the boards themselves. For future research work in this field, it would be interesting to delve into the main sources cited in these theses or to analyse the methodologies and tools most commonly used in them.

[es] Este estudio identifica y analiza las tesis doctorales defendidas en España que aluden al concepto "comunicación interna" en un período de 34 años (1986 y 2019). Para ello se realiza un análisis bibliométrico descriptivo y retrospectivo dividido en tres fases: 1) Búsqueda e identificación en Dialnet Plus y TESEO; 2) Análisis de un total de (n= 81) tesis; 3) Representación gráfica con RStudio de las relaciones entre directores-as y presidentes-as de tribunal. Destacar que están presentes 32 universidades (85,2% de titularidad pública), de las cuales la UCM (22,2%) es la más productiva. La década más prolífera es la de 2010-2019 (56,8%) en la que destaca el año 2016 con el 12,3% de tesis y, en cuanto a idiomas, las tesis se han presentado principalmente en español (92,6%). Su autoría, cercana a la paridad, se distribuye entre un 50,6% de mujeres y un 49,4% de hombres. Existe dirección única en el 71,6% y un promedio de 1,3 directores o directoras por tesis. Además, se observa una dispersión de directores-as y una mínima relación con presidentes-as. En cuanto a la composición de los tribunales, priman los hombres que como presidentes actúan en el 76,5%, como secretarios en el 60,5% y como vocales en el 71% y de nuevo es la UCM es la universidad con mayor presencia. Se concluye que la producción de tesis sobre comunicación interna en España ha vivido un auge en la última década de la mano de las universidades públicas y con la UCM como principal entidad creadora y evaluadora. Sin diferencias de género en cuanto a su origen, sí existe una brecha de género tanto en la dirección como en la participación en los tribunales, donde los hombres adquieren especial protagonismo. Se constata también la casi nula conexión entre directores y miembros de los tribunales.