Are red, yellow, green, and blue perceptual categories?

Red Blue Green Yellow Green Red Blue Red Yellow Green Red Blue Green Blue Red Green

Consider two adolescents: Person One and Person Two. Person One has never used substances and exhibits relatively few behavioral (conduct) problems. On the other hand, Person Two uses substances frequently and more commonly exhibits poor conduct. If you were to guess, which of the individuals would you expect to have lower overall judgment and self-regulation? If you answered Person Two, your i...

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Red–green and blue–yellow mechanisms are matched in sensitivity for temporal and spatial modulation

The spatial and temporal properties of human colour vision are examined using isoluminant, red--green and blue--yellow tritanopic gratings. Chromatic sensitivity is found to be low-pass as a function of both spatial and temporal frequency along all the chromatic axes investigated, including the tritanopic confusion lines employed to examine the properties of the S-cone driven mechanism. Compari...

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Brownish blue Green Bright red Yellow 1 - 0 Brown Greenish yellow Bright red Yellow 1 - 5 Brownish red Yellow Bright rcd Yellow 2 - 0 Red Orangish yellow Bright

SYNOPSIS The statement made in some standard textbooksthatBenedict'squalitativetestgivesa green, yellow, or orange-red precipitate with pure solutions of glucose of varying strength has been shown to be incorrect. Pure solutions ofglucose give only a bright red precipitate at all concentrations. These changes in the colour of the suspensions are observed with urinary glucose only. The differenc...

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Brownish blue Green Bright red Yellow 1 - 0 Brown Greenish yellow Bright red Yellow 1 - 5 Brownish red Yellow Bright rcd

SYNOPSIS The statement made in some standard textbooksthatBenedict'squalitativetestgivesa green, yellow, or orange-red precipitate with pure solutions of glucose of varying strength has been shown to be incorrect. Pure solutions ofglucose give only a bright red precipitate at all concentrations. These changes in the colour of the suspensions are observed with urinary glucose only. The differenc...

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Brownish blue Green Bright red Yellow 1 - 0 Brown Greenish yellow Bright red Yellow 1 - 5 Brownish red Yellow Bright rcd Yellow 2 - 0 Red Orangish yellow Bright red Orangish

SYNOPSIS The statement made in some standard textbooksthatBenedict'squalitativetestgivesa green, yellow, or orange-red precipitate with pure solutions of glucose of varying strength has been shown to be incorrect. Pure solutions ofglucose give only a bright red precipitate at all concentrations. These changes in the colour of the suspensions are observed with urinary glucose only. The differenc...

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Are red, yellow, green, and blue perceptual categories?

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Red Blue Green Yellow Green Red Blue Red Yellow Green Red Blue Green Blue Red Green

Red–green and blue–yellow mechanisms are matched in sensitivity for temporal and spatial modulation

Brownish blue Green Bright red Yellow 1 - 0 Brown Greenish yellow Bright red Yellow 1 - 5 Brownish red Yellow Bright rcd Yellow 2 - 0 Red Orangish yellow Bright

Brownish blue Green Bright red Yellow 1 - 0 Brown Greenish yellow Bright red Yellow 1 - 5 Brownish red Yellow Bright rcd

Brownish blue Green Bright red Yellow 1 - 0 Brown Greenish yellow Bright red Yellow 1 - 5 Brownish red Yellow Bright rcd Yellow 2 - 0 Red Orangish yellow Bright red Orangish

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