There is no real difference if you think about the boundaries between reading and notetaking. Moving the eyes over text: Sounds like reading. Highlighting key words while reading: Still sounds like reading. Jotting down keywords in the margins: Some writing, but still could count as reading. Writing tasks in the marings (e.g. "Should compare that to Buddhism"): Don't know. Reformulating key sections in your own words: Sounds like writing. But could be just the externalisation of what could be internal. Does make a difference if you stop and think about what you read or do it in written form?