PSYC 2145 Lecture Notes - Lecture 17: Backpropagation, Connectionism, Semantic Network
Document Summary
Hierarchical structure leads to cognitive economy: shared properties are stored at higher- level nodes. Represent properties once rather than repeatedly (requires fewer computational resources) Avoiding overrepresentation of features because that requires more resources than you need to deploy. Distance between concepts predicts how long it takes to retrieve information about concepts as measured by the sentence verification technique. It would take longer to answer a canary is an animal than a canary is a bird because the second one takes less travelling. Canary, ostrich are same distance (1link) from bird. Some sentence-verification results are problematic for the model. A pig is a animal faster than a pic is a mammal . A chicken is an animal faster than a chicken is a bird . People take longer to verify statements with less typicality even if they are in the same category. Shorter links to connect closely related concepts. Longer links for less closely related concepts.
