Choice Response Time (CRT). There are multiple stimuli, and each stimulus requires a different response. It is important to understand that response times play a crucial role in experimental cognitive psychology. The basic idea is that response times reflect the time it takes to interpret a stimulus, get information from memory, initiate a muscle response, etc. As we can see in the video, one athlete places the pad target where they want, his partner need to kick or punch as fast is possible according to the position. Sparring another example of choice reaction.