I need help finding the name of a learning defect

Hi, I need some help with my homework. Google wasn't a great help. How is the defect called that leads (children) to "write down" things more often that are easily observed; and to "write down" things less often (or not at all) that are hard to observe. I hope I translated the question right.

Submitted February 22, 2017 at 03:13PM by Schizodroi_dk http://ift.tt/2l9EbgO