Answer:
The correct answer is: The spotlight effect.
Step-by-step explanation:
The spotlight effect can be understood as the tendency that individuals have to perceive themselves as being more noticed than they are.
This phenomenon occurs because individuals overestimate how much they are noticed by other people. One is the center of one's world, therefore one cannot be the center of everyone else's world.
In this particular case, When Vanessa noticed she was wearing mismatched socks, she overestimated the extent to which others would also notices.
Her reaction best illustrates: The spotlight effect.