D-E-D-C-D-E-D Click on image to view the QuickTime movie.

In this example, where the head position is affected by the placement of one's attention, you can see for yourself that if you look at a square (for example) and look at each corner in succession, each corner when looked at is always in the centre of one's attention. In order to notice that, one has to become capable of dropping the hold one's anticipation has (that is, one's anticipation of the "square") on the way one sees. ("Suspend Adumbration" is a Website where I explore some of this more.)

But let's say now that I want to determine the colour of the eyes in the face I am looking at. My scanning pattern will likely change drastically and become something like: E-F-E-F-D-E-F-E-C-E-F, etc.

E-F-E-F-D-E-F-E-C-E-F, etc. Click on image to view the QuickTime movie.

In this example, the head is taken for granted and stays in the centre of the vision, while the attention moves around from scanning point to scanning point, primarily from eye to eye, trying to determine the eye colour.