User can do a 12 items sort, attending to the subtle individual differences between all the parts. Or, the concept of "category" can be introduced when the four types of bushings, grommets are sorted into three categories.
Includes 240 rubber parts, organizer and bins. Also included are step-by-step instructions, performance norms and data sheets. The instructions detail many variations for this task. Sorting tasks are not timed so there are no norms.
Quality criteria: Accuracy.