Why does my web page fade instead of scroll?

As people scroll a web page, are there any studies or evidence around where users focus their attention (top, bottom, middle of the page)?

• For example, do people tend to look at the bottom or top of the page, depending on the direction of scroll?

• Answer:

  Generally speaking, eye statistics indicate a user's line of path to be top to bottom, left to right. This means that the highest trafficked areas move from the top left to the bottom right, usually inline with the content that he/she is most interested in. This graphic shows a good example: http://www.useit.com/eyetracking/eyetracking_corporate_site_about_us.png With that said, it is difficult to answer this question in a vacuum, since it is possible that a user's eye will be fixed on a very visible element such as a vibrant photograph or a large block of yellow text.