When checking for responsiveness in an adult, the correct steps include gently shaking or tapping the person and seeing if they move or make a noise. You should also shout or ask, "Are you OK?" to check for any response. If the person does not respond, call emergency services immediately (such as 911) and seek help.

Key actions when checking responsiveness in an adult:

• Gently shake or tap the person.
• Ask loudly, "Are you OK?"
• Look for any movement or sound in response.
• If no response, call emergency services promptly.

This initial check ensures timely recognition of an unresponsive adult and activates emergency medical response.