4: Learning Mechanisms Last updated Save as PDF Page ID12579 Contributed by 4.1: Introduction4.2: Biology of Synaptic Plasticity4.3: The eXtended Contrastive Attractor Learning (XCAL) Model4.4: When, Exactly, is there an Outcome that should Drive Learning4.5: The Leabra Framework4.6: SubTopics and Explorations4.7: References