A persons IQ can be calculated by having the person take an intelligence test. The average IQ is 100 by definition. If you achieve a score higher than 100, you did better than the average person, and a lower score means you (somewhat) performed less.
Can too much reading affect the brain?
Decision makers have fairly limited cognitive processing capacity. Consequently, when information overload occurs, it is likely that a reduction in decision quality will occur.” Reading is a beneficial activity. But reading too much can also kill your brains productivity especially when no new meanings are created.
What happens to your brain while reading?
When you read letters on a page, the left occipito-temporal cortex of your brain immediately links each written word to its spoken equivalent. This means that they may be more visually oriented, and may learn better from pictures, reading aloud, or listening than from silent reading.