When a visual stimulus is seen before a saccade, subjects are still able to make another saccade back to that image, even if it is no longer visible.
42.
Twenty participants tracked a visual stimulus with a joystick for 50 minutes in 2 dimensions ( up / down / right / left ) on a computer screen.
43.
But, when placed in another setting, the monkey is perfectly capable of performing that movement in a spontaneous, self initiated manner, as a response to the same visual stimulus.
44.
They concluded that valid peripheral cues benefit performance, for instance when the peripheral cues are brief flashes at the relevant location before to the onset of a visual stimulus.
45.
Stiles and Crawford subsequently measured this effect more precisely by observing the visual stimulus of narrow beams of light selectively passed through various positions in the pupil using pinholes.
46.
When plotted on the CIE chromaticity diagram, it can be seen that this is a hue corresponding to that of a visual stimulus of approximately 380 nm on the spectrum.
47.
While these simple cells in V1 respond to oriented bars through small receptive fields, the optimal visual stimulus becomes increasing complex as one moves toward the anterior of the brain.
48.
This system uses a visual stimulus that is usually red in color with a frequency of about 4 Hz to stimulate the neural pathway between the retina and the visual cortex.
49.
The reduced sensitivity to light passing near the edge of the pupil enhances human vision by reducing the sensitivity of the visual stimulus to light that exhibits significant optical aberrations and diffraction.
50.
A motion picture projected on a large screen in front of the room provided the visual stimulus of a drive on streets and highways, while the students " drove " their simulators.
