The main idea of this book is that perceiving is a way of acting. Perception is not something that happens to us, or in us. It is something we do. Think of a blind person taptapping his or her way around a cluttered space, perceiving that space by touch, not all at once, but through time, by skillful probing and movement. This is, or at least ought to be, our paradigm of what perceiving is. The...

The federally administered Supplemental Security Income (SSI) program, created by the provisions of the 1972 Amendments to the Social Security Act, established uniform national eligibility criteria and payment standards for the Nation’s needy population who, in addition to being poor, were also aged, blind, or disabled. It replaced the previous Stateadministered programs of Old-Age Assistance (...

Three key themes reverberate throughout this volume. An equity and excellence theme emphasizes that the creation of high-quality learning opportunities is a core value shared by all the authors of this volume. An elephants theme (as in the poem “The Blind Men and the Elephant” by John Godfrey Saxe)1 reminds us that our educational system includes a multiplicity of subsystems that may or may not...

Introduction Wrinkle ridges are prominent structures mapped throughout Mars where they accommodate shortening above thrust faults due to planet-scale loading of the Tharsis rise and other features. Solis Planum contains some of the most distinct and well studied arrays of wrinkle ridges on Mars and is a focus of our work. Many previous studies have conducted modeling of these wrinkle ridges in ...

DB, the first blindsight case to be tested extensively (Weiskrantz, 1986) has demonstrated the ability to detect and discriminate a range of visual stimuli presented within his perimetrically blind visual field defect. In a temporal two alternative forced choice (2AFC) detection experiment we have investigated the limits of DB's detection ability within his field defect. Blind field performance...

Estimations of daylight factors, used to calculate energy savings, typically do not consider occupants’ use of window blinds. The data indicate that such estimations should include some assessment of window blind usage, because over half of the window area is usually occluded in some way by blinds. It appears that many occupants purposely use window blinds to sunlight from penetrating their wor...