Anna was usually quiet and shy at home with her six brothers and sisters, so her mom was surprised when her teacher described her as outgoing and chatty at school. the best possible explanation for the difference in behavior is trait perspective trait expression personality type personality abnormality

The answer is: Trait expression

Trait expression refers to the specific characteristics that usually imposed by an individual to anther person based on personal observation.

Trait expression is not a reliable measure to judge other's personalities since people could act differently if they are interacting in a different environment, just like what anna did.

answer; they both highlight the power of the situation in determining behavior;