Tactile Accuracy

Tactile accuracy is an evaluation criterion for measuring how well a person perceives the shape information of an object in a tactile image through touch. Unlike "naming accuracy" (whether someone can name the object), tactile accuracy captures whether the person has obtained key shape information even if they cannot produce the correct name — for example, recognizing a shape as an animal even if they cannot identify it as a sheep. Tactile accuracy uses a multi-level coding scheme that includes exact naming, categorization at multiple levels, identification of similar shapes from different categories, and recognition of other objects in the same category. This criterion better reflects what touch actually conveys and avoids underestimating blind users' perception.