Andrew Huberman· PhD
During the first five, maybe even 10 minutes of reading a book chapter, unless you are absolutely enthralled from the first word, or you are intensely curious what the material in that book chapter is-- maybe that book chapter is about you and what's going to happen to you next in your life. But unless it's one of those specific instances, it's going to be about five or 10 minutes before the neural circuits in your brain that are required to understand and digest and commit that material to memory are going to come online at the levels of activity that are going to be required for you to experience that as intense focus, or even as mild focus.