“Valley Girl Speak” – is there such a thing?

A study by Amalia Arvaniti and Amanda Ritchie of the phenomenon of “uptalking” (rising intonation in declarative sentences) has found that men also participate in this speech pattern, though it is twice as prevalent among young females as males in Southern California. However, it remains unclear whether this feature originated in Southern California among females (it is found widely among younger speakers), and researchers also do not know why women use it more frequently:
http://nyti.ms/Jlp5AW