Corrective feedback

Specific information provided to a user after an action that identifies what was done incorrectly and how to improve on the next attempt. In accessible interaction design, corrective feedback for blind users is typically delivered through text-to-speech (e.g., "make it longer," "try wider") and is effective for conveying discrete, precise corrections to gesture parameters like direction, size, and location. Corrective feedback is complementary to sonification: verbal corrections excel at specific adjustments while sonification better conveys continuous and temporal properties. Effective gesture training systems should combine both modalities.