How to communicate: spontaneous requesting – 2 person prompt- pick up, reach, release.
Phase 2 Distance and persistence: travel to communication partner, take symbols/PECS, persistence across obstacles.
Phase 3A – simple discrimination: highly preferred vs non preferred, 4 step error correction.
Phase 3B – Conditional discrimination – correspondence checks, 4 step error correction, find picture in books
Phase 4 – Sentence structure e.g. I want, using descriptive vocabulary e.g. colours. Quantity, size. shape.
Phase 5 – answering questions
Phase 6 – commenting