Final answer:
The first step is to make sure the resident is safe. It is important to address this behavior as it falls under elder abuse. Notify your supervisor about the incident.
Step-by-step explanation:
The first step you should take if you witness a resident pinch another resident hard enough to make them yell out is to make sure the resident is safe. This involves intervening to prevent further harm and ensuring both residents are out of immediate danger.
It is important to address this behavior because it falls under elder abuse, specifically physical abuse. Pinching someone hard enough to make them yell out is not normal behavior and should not be ignored.
After ensuring the resident's safety, it is recommended that you notify your supervisor about the incident. Your supervisor can take appropriate action and involve other necessary parties, such as calling Adult Protective Services if needed.