Which technique is used to check for responsiveness in a victim?

To assess a victim’s responsiveness effectively, the appropriate technique is to gently shake the victim and shout at them. This approach is critical because it allows the lifeguard or responder to quickly determine if the victim is conscious and able to respond verbally or physically to external stimuli. By shaking the person gently and calling out to them, you are providing a clear and immediate stimulus that can indicate awareness and responsiveness.

In contrast, the other techniques mentioned serve different purposes. Checking for pulse is important for assessing circulation but does not provide information about a person's responsiveness. Looking for chest movement can indicate breathing but doesn't reveal if the individual is responsive or aware. Performing a sternal rub, while it can elicit a response, is generally a more aggressive technique and is typically used when other methods indicate unresponsiveness. Therefore, shaking the victim gently and shouting is the most effective and universally accepted first step in checking for consciousness and responsiveness in an emergency situation.