Background: People with aphasia (PWA) frequently present impairments in reading comprehension. Such impairments can be particularly debilitating due to the limitations and constraints they impose on everyday life. Recent technological advancements in the field of information and communication technologies offer many compensative tools for PWA. However, most technological tools are designed for patients with speech production impairments. Instruments addressing reading impairments associated with aphasia remain scarce and underrepresented in the scientific literature. Aims: To conduct a state-of-the-art review of the technologies currently available to PWA and acquired reading impairments. In particular, this review covers (1) research on technologies explicitly developed to compensate for reading difficulties associated with aphasia; and (2) research into which accessibility features included in mainstream high-tech systems are helpful for PWA when trying to access written material. Methods & Procedures: Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) international standard, the authors conducted a systematic review from 2009 to 2019. The databases inspected were Scopus, Web of Science, PubMed, the Cochrane collection, IEEE Xplore, ScienceDirect and SpringerLink. Other research papers were included after checking the references of the selected papers. Main Contribution: The review reveals that research on compensative devices for reading impairments largely neglects tools for individuals with aphasia and acquired reading difficulties. Most of the studies in this field are qualitative investigations of how patients with literacy difficulties tackle everyday tasks with the help of mainstream technology (e.g., smartphone applications). Therefore, this paper highlights the scarce high-tech alternatives that support text comprehension in PWA and acquired reading impairments, and suggests further work on the development of customized software for smartphones and personal computers. Conclusions: High-tech reading tools may help PWA to regain reading autonomy. PWA and acquired reading impairments employ a wide array of devices to overcome reading difficulties, which underlines the importance of reading in everyday life. However, the supports currently available are not yet flexible and accurate enough to answer their day-today needs. Thus, further work is necessary to enhance the compensative devices available to them. For instance, existing new technologies in the area of natural language processing (such as automatic text simplification) could potentially be used in compensative devices.

Text-to-speech (TTS) systems provide fundamental reading support for people with aphasia and reading difficulties. However, artificial voices are more difficult to process than natural voices. The current study is an extended analysis of the results of a clinical experiment investigating which, among three artificial voices and a digitised human voice, is more suitable for people with aphasia and reading impairments. Such results show that the voice synthesised with Ogmios TTS, a concatenative speech synthesis system, caused significantly slower reaction times than the other three voices used in the experiment. The present study explores whether and what voice quality metrics are linked to delayed reaction times. For this purpose, the voices were analysed using an automatic assessment of intelligibility, naturalness, and jitter and shimmer voice quality parameters. This analysis revealed that Ogmios TTS, in general, performed worse than the other voices in all parameters. These observations could explain the significantly delayed reaction times in people with aphasia and reading impairments when listening to Ogmios TTS and could open up consideration about which TTS to choose for compensative devices for these patients based on the voice analysis of these parameters.