Historically, the bodily senses have often been regarded as impeccable sources of spatial information and as being the teacher of vision. Here, the authors report that the haptic perception of slope by means of the foot is greatly exaggerated. The exaggeration is present in verbal as well as proprioceptive judgments. It is shown that this…

Describes an experiment in which students work together in small groups, take data, and make a calculation to roughly determine the diameter of the blind spot in their eye. (WRM)

Two experiments with 11 college students demonstrate the influence of their prior visual adaptation to motion on the imagined speed of an imaginary moving object. Results suggest that imagined motion and real vision may engage common neural mechanisms without being functionally equivalent. (SLD)

This annotated bibliography containing research on visual perception executed at photopic levels in artificial laboratory situations has been compiled to make information available that can be applied to scotopic perception of natural objects in natural situations. There are 407 reports or studies, published from 1945 through 1964, cited in this…

Presents a quantitative calculation of the inadequacy of human vision to illustrate Heisenberg's uncertainty principle. (MLH)

Studies demonstrate increasing glucose metabolic rates in human primary (PVC) and association (AVC) visual cortex as complexity of visual scenes increase. AVC increased more rapidly with scene complexity than PVC and increased local metabolic activities above control subject with eyes closed; indicates wide range and metabolic reserve of visual…

Discusses human ability to perceive repeated sensory stimuli in the visual system, and explains that its frequency fc has a critical value, under normal conditions, about 40 Hz. (GA)

The Perky effect, identified in 1910, is the reduction in performance from the no-imagery to the imagery condition. A series of experiments with over 100 undergraduates and graduates shows that the reduction reflects a true reduction in visual sensitivity, not just alteration in criteria for responding or response organization. (SLD)

Four experiments involving 367 college students and 259 sixth graders demonstrate that children and adults, when asked to represent vision schematically, have a bias to draw arrows pointing away from the eye and toward a visual efferent. The role of this type of representation in learning is discussed. (SLD)

Reviews research done on the nature of vision from a neurologic perspective. Proposes a multiplex filter model to explain patterns in the signals transmitted to the brain from the retina. Describes experiments done to test the model. (CW)

Discusses physiological and psychological aspects of color. Includes guidelines for using color effectively, especially in the development of computer programs. Indicates that if applied with its limitations and requirements in mind, color can be a powerful manipulator of attention, memory, and understanding. (Author/JN)

Describes a corrective method of color adaptation designed to allow most, if not all, individuals to participate in the learning process as well as social and work-related environments. Provides a concise summation of facts and theories concerning color deficiency. Includes anatomical drawings, graphs, and statistical data. (MJP)