A PECS user consistently uses incorrect sentence structure (e.g., 'Want ball'). What is the MOST effective error correction procedure?

The most effective error correction procedure for a PECS (Picture Exchange Communication System) user consistently using incorrect sentence structure, such as 'Want ball,' is a systematic approach called Expanded Modeling. PECS is a visual communication system where individuals use pictures to communicate their wants and needs. Initially, PECS focuses on requesting single items. However, progressing to correct sentence structure is a crucial step toward more complex communication. Expanded Modeling directly addresses this need. Expanded Modeling involves the communication partner (e.g., teacher, parent) observing the child’s communication attempt, and then *immediately* expanding upon it with a complete, grammatically correct sentence. Th....