The aim of this doctoral thesis is to investigate the combined use of Virtual Reality (VR) technologies and Event Related Potentials (ERPs) in the context of Computerized Speech Language Therapy (CSLT) of post-stroke survivors (PSS) with language and communication problems (aphasic patients or People With Aphasia, PWA). The ultimate goal of this work is the design and development of a novel CSLT application, possibly for more than one setup or device to cover diverse target groups. A preliminary search has shown that few such applications exist; only one relies on immersive VR; none has used ERPs as an assessment tool.