The paper presents a unique approach in associating perspective projection with the image beheld by the eye and demonstrates that all graphical and photographic perspective projections must contain distortion when compared to the image beheld by the eye. (Contains 8 figures.)

We investigated how within-stimulus heterogeneity affects the ability of rhesus monkeys to order pairs of the numerosities 1 through 9. Two rhesus monkeys were tested in a touch screen task where the variability of elements within each visual array was systematically varied by allowing elements to vary in color, size, shape, or any combination of…

Learning centers are a highly regarded and widely accepted practice in early childhood classrooms. Centers offer a variety of experiences during a single time segment that encourage children to explore materials, interact with peers, and accomplish new tasks. In this article, the author presents the block center, a popular mainstay among learning…