M. Singh and B. L. Anderson proposed a perceptual theory of achromatic transparency in which the perceived transmittance of a perceived transparent filter is determined by the ratio of the Michelson contrast seen in the region of transparency to that of the background seen directly. Subsequently, B. L. Anderson, M. Singh, and J. Meng proposed that…

Preparing students to be both constructors and consumers of visual information will be an important responsibility for all teachers. This will mean giving learners the tools to go beyond what is merely visual to the deeper, human meanings that lie beneath. One important way that educators can prepare students to be wise visual consumers is to help…

Despite the central role of risk assessment in analyzing and making decisions about many environmental issues, most people are poorly equipped to understand key concepts about risk or apply them successfully. I present three class activities in which students develop a better appreciation for the magnitude of a one in a million increased risk of…