Told that an elephant is not a horse, a boy changes his whole idea of animals. This is:

1. The boy first saw the elephant through his existing *horse* scheme. 2. The correction shows the old scheme does not work for this animal (disequilibrium). 3. He resolves it by modifying his animal schema to make room for elephants. 4. Changing the schema itself to fit new information is **accommodation**. 5. Had he kept calling it a horse, that would have been assimilation. **Why not the others:** Assimilation is the trap here: it describes the boy's first reaction, not the change he makes after correction. _Source: Wikipedia, "Piaget's theory of cognitive development", section "Cognitive equilibration" (revision 1379038101)_