Pulido Pascual, José CarlosFunke, RebeccaSmith, Beth A.Mataric, MajaGarcía Polo, Francisco Javier2020-03-262020-03-262018-11-21J. C. Pulido, R. Funke, J. García, B. A. Smith y M. Mataric. Adaptation of the Difficulty Level in an Infant-Robot Movement Contingency Study. Advances in Intelligent Systems and Computing, Vol. 855, pp. 70-83 (2019)978-3-319-99884-8https://hdl.handle.net/10016/3003119th International Workshop of Physical Agents (WAF). Madrid (22-23 Noviembre 2018)ABSTRACT: This paper presents a personalized contingency feedback adaptation system that aims to encourage infants aged 6 to 8 months to gradually increase the peak acceleration of their leg movements. The ultimate challenge is to determine if a socially assistive humanoid robot can guide infant learning using contingent rewards, where the reward threshold is personalized for each infant using a reinforcement learning algorithm. The model learned from the data captured by wearable inertial sensors measuring infant leg movement accelerations in an earlier study. Each infant generated a unique model that determined the behavior of the robot. The presented results were obtained from the distributions of the participants' acceleration peaks and demonstrate that the resulting model is sensitive to the degree of differentiation among the participants; each participant (infant) should have his/her own learned policy.eng© Springer Nature Switzerland AG 2019Socially assistive roboticsInfant-robot interactionUser adaptationReinforcement learningconference proceedingsInformáticahttps://doi.org/10.1007/978-3-319-99885-5_6open access7083Advances in Physical Agents. WAF 2018855CC/0000029179