A research method used photographs of people exhibiting different facial expressions and required participants to label the emotion demonstrated in each photograph. what did this procedure reveal?

This procedure revealed that g roups tested from all over the world agreed on the emotion exhibited by facial expression.

It means that all over the world, facial expressions denote the same emotions, which is why all of the participants were able to recognize what these expressions were trying to convey. I guess that facial expressions and what they represent are universal.