I have to record Reaction Time after an audio stimulus of a beep, i.e. time between the instances when audio begins to play till the time person press the space bar. I'm totally unaware about the software, and doesn't know about using it. I urgently need to measure the reaction time in 2 - 3 days. Can anyone please help me. I'm not able to understand how to use the software, inspite of wasting my time from 2 days.! Please reply fast, and I would be very thankful if anyone can give me .osexp file by making it for me.