Systematic Screening for behavioral disorders in three steps was created in 1990 by whom?

• A. Walker
• B. Smith
• C. Johnson
• D. Lee

Answer: (A)

The question is asking who first introduced a systematic, three‑step screening approach for behavioral disorders. This method, Systematic Screening for Behavioral Disorders, was developed in 1990 by Walker. Walker is the name most closely associated with creating and popularizing this three-step framework in that era, which gave educators a practical, scalable way to flag potential behavioral disorders in students with severe-profound disabilities. The idea is to start with a broad screening to identify concerns, then gather and review data to confirm patterns, and finally decide whether a formal evaluation or specific intervention is needed. The other names don’t have this same historical attribution to the SSBD framework.