1. Language Development Lab, Department of English Studies, Faculty of Philosophy, Aristotle University of Thessaloniki, PC 54124 Thessaloniki, Greece
2. Department of Speech and Language Therapy, University of Peloponnese, PC 24100 Kalamata, Greece
3. Laboratory of Medical Physics & Digital Innovation, Faculty of Health Sciences, School of Medicine, Aristotle University of Thessaloniki, PC 54124 Thessaloniki, Greece
4. Department of Psychology, Aristotle University of Thessaloniki, PC 54124 Thessaloniki, Greece
5. School of Computer Science, University of Lincoln, Lincoln PC LN6 7TS, UK