Ok, meta perspective here... I love this! What a fascinating insight into how women mirror each other & connect with the group. We are both socialized and have the hormonal profiles to be relational. This is a fantastic example of the group bonding that especially young women engage in.

We all had our analogs to this behavior, and just like this characteristic, I bet we were unconcious of our group bonding behaviors. I am also interested to know if this vocal trend is cross cultural. The women in the vid were all middle class white women.