Fast Interaction 1.0.2 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free Mac application is David Stanley.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The most popular version among the program users is 1.0. Fast Interaction was developed to work on Mac OS X 10.8 or later. The program lies within Education Tools, more precisely Science.
From the developer:
Fast Interaction conducts regression analyses to determine if two continuous variables interact to predict a criterion variable. Results are presented in a table and a 2-D/3-D graph. Simple-slope lines are calculated and displayed in the context of the 3-D surface.
You may want to check out more Mac applications, such as Fast Rabbit Typing, A+ Interactive Software or Interactive Presentation Utility, which might be similar to Fast Interaction.
Teaching Tools
Mind mapping