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Color psychology is the study of hues as a determinant of human behavior. Color influences perceptions that are not obvious, such as the taste of food. Colors have qualities that can cause certain emotions in people. How color influences individuals may differ depending on age, gender, and culture.
These theories were enhanced by 18th-century investigations of a variety of purely psychological color effects, in particular the contrast between "complementary" or opposing hues that are produced by color afterimages and in the contrasting shadows in colored light.
In the psychology of color, color preferences are the tendency for an individual or a group to prefer some colors over others, such as having a favorite color or a traditional color.
Goethe's studies of colour began with experiments which examined the effects of turbid media, such as air, dust, and moisture on the perception of light and dark. The poet observed that light seen through a turbid medium appears yellow, and darkness seen through an illuminated medium appears blue.
The Lüscher color test is a psychological test invented by Max Lüscher in Basel, Switzerland, first published in 1947 in German and first translated to English in 1969. The simplest form of the test instructs a subject to order a series of 8 colors in order of preference .
In psychology, the Stroop effect is the delay in reaction time between congruent and incongruent stimuli. The effect has been used to create a psychological test (the Stroop test) that is widely used in clinical practice and investigation.
The field of color psychology attempts to identify the effects of color on human emotion and activity. Chromotherapy is a form of alternative medicine attributed to various Eastern traditions. Colors have different associations in different countries and cultures.
In formal color theory, purple colors often refer to the colors on the line of purples on the CIE chromaticity diagram (or colors that can be derived from colors on the line of purples), i.e., any color between red and violet, not including either red or violet themselves.
Opponent color pairs based on the NCS experiment, including black, white and the four unique hues. The colors that define the extremes for each opponent channel are called unique hues, as opposed to composite (mixed) hues.
In column 2, metamerism is used to simulate the scene with blue, green and red LEDs, giving a similar response. In colorimetry, metamerism is a perceived matching of colors with different (nonmatching) spectral power distributions. Colors that match this way are called metamers .