If the topic affects me and/or I am interested in it, I can read a book quite fast.
However, even then I need a certain level of silence otherwise I will end up rereading several sentences because I start to focus on noise or other distractions and forget where I was at. If it is noise, my eyes keep on reading and my mind is focusing on the noise with the result of getting lost. Nonetheless I was usually one of the first who was done reading texts that we had to read in school and waiting for others to finish so I could finally get my task... the teacher (referring to teachers in general here) usually asked "Are you done again?" but refused to give me the task before the others, that wasted time/waiting was boring. Nowadays most textsheets we get usually contain tasks so the teacher can sit back and browse some websites on his/her tablet or read something or whatever, so I can get to work immediately after being done. If it is group work, I will still have to wait for the others though. At least I can now just draw in class due to the "so what, they're almost adults" attitude of teachers without getting scolded or having my spiral note pad taken away from me.
Other times the teacher would just say "well, did you mark certain passages in the text?" and if I didn't, s/he forced me to do so, although I already processed and separated important and unimportant information in my mind in most cases...
Sometimes it can happen that if the topic is way too interesting, my eyes keep on reading but I start thinking about how this relates to that, why it is that way, what other theories could apply, etc. and then have to go back to where my mind left the book/text/article.
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Diagnosed with Aspergers.
BSP-errors are awesome.