The widely-used Tukey's HSD index is not produced in the current version of SPSS (i.e., PASW Statistics, version 18), and a computer program named “HSD Calculator” has been chosen to amend this problem. In comparison to hand calculation, this program application does not require table checking, which eliminates potential concern on the size of a Studentized range table that might not cover various degrees of freedom. Since the software is free and downloadable online, this approach demonstrated a simple and practical solution for the SPSS-based HSD computing