This assumption had been implicit rather than explicit and had never been questioned and discussed
This is referring to the question of whether or not experts know it all, or what are the effects of this assumption. They answer by saying studies found that the concern of appearing to know it all was causing constraint on the ability to learn new things.
They knew that no single document or picture could tell the story of history; hence, they thought very hard about their choices. In contrast, the students generally just looked at the pictures and made a selection without regard or qualification. For students, the process was similar to finding the correct answer on a multiple choice test.
I find this very important. It adds to the idea that people who are more knowledgeable look for deeper connections, and they go the extra mile to reflect what they learn. A normal student would just pick one picture because that was the baseline of the assignment. An expert will go deeper than that because they have a better understanding of it. This somewhat connects to our readings and the idea that it's important to make deep connections when reading things to better understand it.
Experts have acquired a great deal of content knowledge that is organized in ways that reflect a deep understanding of their subject matter.
I can connect this to my personal learning because this is something I most definitely do when I'm trying to learn material . I take countless notes and keep them very organized. Organization helps me remember what I'm writing down and helps me better understand it.
This chapter illustrates key scientific findings that have come from the study of people who have developed expertise in areas such as chess, physics, mathematics, electronics, and history. We discuss these examples not because all school children are expected to become experts in these or any other areas, but because the study of expertise shows what the results of successful learning look like.
I do see where the author lays out the main claim of the text. They state it right at the beginning of the reading. I think the claim is saying that we'll be reading about studies resulting from observing how people develop enterprise on a certain topic, or how they become “experts.” I think the claim did a good job of grabbing my attention because I’m interested in learning how to become an expert in something.