ALTHOUGH we have several space-senses, most of us live predominatingly in a world of visual space. Visual space-perception is therefore one of the largest and most important topics in psychology. We shall limit our experiments in this chapter to a few features of visual space images.
1. Outward Projection of the Visual Image.
a. Floating Flakes.--Look toward the sky with your eyelids almost closed and observe a sort of snowfall effect. Describe it.
These flakes are the shadows, on the retina, of particles floating in the vitreous humor. They are projected as objects in outer space in accordance with the law of outward projection.†____________________