Final answer:
Reactive ability in an agility test can be measured by observing responses to visual and auditory stimuli, such as using a stopwatch for visual reaction timings and the sound of a beep or whistle for auditory reactions.
Step-by-step explanation:
Reactive ability is a crucial component in agility tests. It can be measured by observing an individual's response to two primary things: visual and auditory stimuli. In an agility test context, a participant's reaction time to visual stimuli could be tested by signaling them to start the test through a visual cue, such as a flashing light or a sudden movement.
Similarly, auditory stimuli can be tested through sounds or verbal commands which the participant must respond to immediately. For example, a simple method to measure reaction time to visual stimuli is using a stopwatch. A participant could attempt to quickly stop the stopwatch as soon as it is started. For auditory stimuli, participants might be asked to start running when they hear a beep or a whistle. The forecast temperature on the day of the test can also be relevant, as environmental conditions may impact reaction times.