A psychological space is established for any set of stimuli by determining metric distances
between the stimuli such that the probability that a response learned to any stimulus will …

The universality, invariance, and elegance of principles governing the universe may be
reflected in principles of the minds that have evolved in that universe—provided that the …

Beukelman (1991) introduced the concept of the magic versus the cost of communicative
competence in AAC. Fundamentally, this refers to the relative effort that must be exerted (the …

Originally published in 1987, this book, attempted to bring together work by researchers
concerned with the functional and neurological mechanisms underlying visual object …

Five studies examined the use of scene-based and viewer-centered (ie, head-or retina-
based) representations for comparing shapes at different orientations. Two objects that …

There are infinitely many ways in which an object might rigidly move between any two
positions in space. Experiments on real, apparent, and imagined motion indicate, however …

Observers judged whether 2 successive computer-displayed rotations of a cube were the
same or different. With respect to the observers, each rotation was about a vertical axis (Y), a …

Abstract Kosslyn (1980, 1983) theorized that performance measures on imagery tasks may
vary as a function of the existence of independent processes in imaging ability. Tue present …

Myearly fascination with geometry and physics and, later, with perception and imagination
inspired a hope that fundamental phenomena of psychology, like those of physics, might …

Extending Fitts' law to more than one dimension has been recognized as having important
implications for HCI. In spite of the progress made over the years, however, it is still far from …