Does this word sounds familiar to you or not ?
Stereognosis, or tactile gnosis, is recognizing and identifying the characteristics of an object only by soliciting touch (tactile perceptions) as well as the position, weight,... (proprioceptive information) of an object.
What's the point ?
Each of us, on a daily basis, often mechanically uses our ability to use or recognize objects without seeing them.
It is the handle of the fork that we take without looking at it, the keys that we seek in the pocket, ...
Tactile discrimination, motor control, etc. are thus developed and allow ease in everyday life and the ability to then perform more complex actions.
Early detection of difficulties in these areas will then allow a specialist to provide appropriate interventions.
The mystery bag is one of the tools for developing stereognosis.