Answer: centration.
Explanation: Centration involves focusing on one aspect of a situation and ignoring the others and It is a common phenomenon in early childhood. Furthermore, centration refers to the tendency of children to pay attention on only one salient aspect of an object, situation, or problem at a time, while they exclude other potentially important aspects.
According to the text, Brandon has no problem understanding that the 20-year-old woman who sometimes stays with him is both a student and a babysitter. However this is because Brandon's thinking has moved beyond centration. It means Brandon no longer think along one direction at the expense of others.
