Programming a Robot or an Avatar: A Study on Learning Outcomes, Motivation, and Cooperation. - Rianne van den Berghe; Hans Petersen; Annika Hellendoorn; Hanno van Keulen (HRI (Companion), 2020)

Robotic Task Complexity and Collaborative Behavior of Children with ASD. - Franziska Prummer; Annika Hellendoorn; Rianne van den Berghe; Hans Petersen; Erik Ploeger; Hanno van Keulen (HRI, 2022)