Latency refers to the amount of time that passes between a given prompt or cue and the initiation of the desired behaviorBehavior refers to any activity or action that living o.... It measures how long it takes for a person to begin the behavior after being prompted.
Example
Imagine a teacher tells a student, “Please start your math homework.” If the student begins working on the math homework 30 seconds after the teacher gives the prompt, the latency would be 30 seconds. To measure this, the observer would start a timer when the prompt is given and stop it when the student begins the task.