Chapter: 'Enhancing Public Speaking Skills - An Evaluation of the Presentation Trainer in the Wild' from book: Adaptive and Adaptable Learning: 11th European Conference on Technology Enhanced Learning, EC-TEL 2016, Lyon, France, September 13-16, 2016, Pr - Verbert, Katrien. Sharples, Mike. Klobucar, Tomaz. (Springer International Publishing, 2016)