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photopic-sensitivity curve

a graph of visual threshold as a function of wavelength under light-adapted conditions. The peak of the human photopic-sensitivity curve falls at approximately 555 nm, which means that less stimulus energy is needed for detection at this wavelength than at any other wavelength under daylight conditions. See photopic vision.

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Psychology term of the day

January 3rd 2025

politeness

politeness

n. the process by which a speaker attempts to avoid harm to a listener’s public image or private self-concept through the use of nonthreatening or face-saving forms of speech. Politeness involves steering clear of content or forms of language that might embarrass listeners, make them feel uncomfortable, or lessen their self-respect. It also involves actively using language that maintains or enhances the listener’s dignity, prestige, and autonomy. For example, a speaker might preface the request for a favor by saying, “I’m sorry to bother you, and feel free to say no, but I wonder if you would. . . .” Politeness is one aspect of facework.