We present a developmental neural network model of motor learning and control, called RL_SURE_REACH. In a childhood phase, a motor controller for goal directed reaching movements with a redundant arm develops unsupervised. In subsequent task-specific learning phases, the neural network acquires goal-modulation skills. These skills enable RL_SURE_REACH to master a task that was used in a psychological experiment by Trommersh&ser, Maloney, and Landy (2003). This task required participants to select aimpoints within targets that maximize the likelihood of hitting a rewarded target and minimizes the likelihood of accidentally hitting an adjacent penalty area. The neural network acquires the necessary skills by means of a reinforcement learning based modulation of the mapping from visual representations to the target representation of the motor controller. This mechanism enables the model to closely replicate the data from the original experiment. In conclusion, the effectiveness of learned actions can be significantly enhanced by fine-tuning action selection based on the combination of information about the statistical properties of the motor system with different environmental payoff scenarios.
Herbort, O., Ognibene, D., Butz Martin, V., & Baldassarre, G. (2007). Learning to select targets within targets in reaching tasks. In Development and Learning, 2007. ICDL 2007. IEEE 6th International Conference on (pp.360-365). Springer [10.1109/devlrn.2007.4354040].
|Citazione:||Herbort, O., Ognibene, D., Butz Martin, V., & Baldassarre, G. (2007). Learning to select targets within targets in reaching tasks. In Development and Learning, 2007. ICDL 2007. IEEE 6th International Conference on (pp.360-365). Springer [10.1109/devlrn.2007.4354040].|
|Carattere della pubblicazione:||Scientifica|
|Presenza di un coautore afferente ad Istituzioni straniere:||Si|
|Titolo:||Learning to select targets within targets in reaching tasks|
|Autori:||Herbort, O; Ognibene, D; Butz Martin, V; Baldassarre, G|
|Data di pubblicazione:||2007|
|Nome del convegno:||ICDL 2007 - 6th IEEE International Conference on Development and Learning|
|Appare nelle tipologie:||02 - Intervento a convegno|