I've always loved pondering emotion theories and usually agree with them, but Plutchik describes the intense form of anticipation to be Vigilance, and this is quite confusing to me.
Vigilance as defined on wiki:
"In modern psychology, vigilance, also termed sustained concentration, is defined as the ability to maintain concentrated attention over prolonged periods of time."
This describes a character trait and not an emotion. So my question is has the meaning of vigilance changed since Plutchik's theory, and if so what would be the modern equivalent of this emotion. Or did Plutchik drop the ball on this part of an otherwise excellent theory.