In some individuals, a visually presented letter or number automatically evokes the perception of a specific color, an experience known as color-grapheme synesthesia. It has been suggested that parietal binding mechanisms play a role in the phenomenon. We used a noninvasive stimulation technique, transcranial magnetic stimulation (TMS), to determine whether the posterior parietal lobe is critic...

N color palette—the changing sky, autumn leaves, the tinted irises of beloved eyes—has allured human interest since time immemorial. Scientific advances over the past twenty years have led to a far better understanding of the relevance and physiological basis of color experience than ever before. Recent research in molecular genetics, color perception and cognitive psychology is clarifying the ...

The research presented in this paper looks at ECA’s and the influence of the color of their clothing on user perception. To perform this research an experiment was done. In the experiment two different colored versions of the same ECA told a story after which test subjects answered questions on their perception of the ECA and the contents of the story. The initial literary research gave good re...

It is well established that about 2 percent of otherwise normal human males are confusers of red and green from birth. There is considerable interest in the question: What do red-green confusers see? From a knowledge of the normal color perceptions corresponding to deuteranopic and protanopic red and green, we may not only understand better why color-blindness tests sometimes fail, and so be in...

In the State of Tennessee, the Tennessee Department of Environment and Conservation (TDEC) is the NPDES permitting authority who sets color limits for a recreational water use color narrative under the auspices of EPA review that requires effluent discharge to be free of objectionable color, but the narrative lacks numeric guidance on how to determine an acceptable discharge color. The City of ...

The reasons for the circular sense of human color perception generated by two sorts of color opponent neurons and three cone types are not well understood. Here we use geometrical analysis to examine the hypothesis that opponency, the recursive nature of color perception, and trichromacy arise as the most efficient ways of distinguishing spectrally different points on a plane using a minimum of...