What are the four steps associated with perception-reaction time, in order?

• A. Detection, Identification, Decision, Response
• B. Detection, Decision, Identification, Response
• C. Detection, Identification, Response, Decision
• D. Identification, Detection, Decision, Response

Answer: (A)

Perception-reaction time is the time from noticing a hazard to starting the actual action. The four steps occur in this order: first detection, when you notice that something in the environment has changed. Next, identification, where you interpret what the hazard is and what it could mean for you. Then decision, choosing the appropriate course of action. Finally, response, when you initiate the physical action, such as applying the brakes or steering away. This sequence explains why the correct order is detection, identification, decision, response. Other sequences would place steps out of logical order—for example, deciding before you’ve identified the hazard, or reacting before you’ve made a decision.