Shannon’s Index of Difficulty ( $ID$ ). reputable for quantifying the perceived difficulty of pointing tasks as a logarithmic relationship between movement-amplitude ( $A$ ) and target-width ( $W$ ). is used for modeling the corresponding observed movement-times ( $MT_{O}$ ) in such tasks in controlled experimental setup. However. https://www.ensemblecarpediem.com/product-category/silicone-moulds/