Summary: <br> A look at how we understand and think about semantic<br> knowledge. I discuss semantic and propositional networks, the spreading<br> activation model, present some evidence in favour of these models, and discuss<br> the promising new approach of connectionism. I also examine how we classify<br> objects into categories, looking at prototype and exemplar theories, family<br> resemblance, graded membership, and the theory-theory of concepts.<br>
