The optimal position of the focal spot was found to be at the distance of 6 mm before the laser-produced plume.
We do not understand the notion of a "psychological" theory that is "nonindividualistic"; the individual organism is psychology's focal level of analysis.
One possibility is that the capacity of focal attention differs for simultaneously available elements arrayed in space, and for representations encountered over time.
The final focal radius is about 2.4 mm in the case with the insulator guide.
The measured focal spot radius was 13 mm.
The width at halfmaximum focal spot radius measured in vacuum was about 10 mm.
It provides a focal point for the viewer, leading the eye and telling it where to rest.
They argue that we do not impute irrationality to our visual systems because they fail to screen out the information that is not focal.
