In ethology and cognitive ethology, the hawk/goose effect refers to a behavior observed in some young birds when another bird flies above them: if the flying bird is a goose, the young birds show no reaction, but if the flying bird is a hawk, the young birds either become more agitated or cower to reduce the danger. It was first observed by Konrad Lorenz and Nikolaas Tinbergen. Using only the above description and what you know about the world, "The hawk/goose effect is only observed in some older doves" is definitely correct, incorrect, or inconclusive? 