The purpose of this web page is to simulate a two-alternative forced choice (2AFC) situation. To use this simulation app, you should: 1) Provide a label for the 1st Outcome, 2) Provide a label for the 2nd Outcome, 3) Provide a valid probability (i.e. a value between 0 & 1) for the 1st outcome, and 4) Provide a valid number for the Number of Trials (i.e. a value greater than 0 and less than 1000).